mcs/class/referencesource/mscorlib/system/threading/thread.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6 //
   7 // <OWNER>Microsoft</OWNER>
   8 /*=============================================================================
   9 **
  10 ** Class: Thread
  11 **
  12 **
  13 ** Purpose: Class for creating and managing a thread.
  14 **
  15 **
  16 =============================================================================*/
  17
  18 namespace System.Threading {
  19     using System.Threading;
  20     using System.Runtime;
  21     using System.Runtime.InteropServices;
  22 #if FEATURE_REMOTING
  23     using System.Runtime.Remoting.Contexts;
  24     using System.Runtime.Remoting.Messaging;
  25 #endif
  26     using System;
  27     using System.Diagnostics;
  28     using System.Security.Permissions;
  29     using System.Security.Principal;
  30     using System.Globalization;
  31     using System.Collections.Generic;
  32     using System.Runtime.Serialization;
  33     using System.Runtime.CompilerServices;
  34     using System.Runtime.ConstrainedExecution;
  35     using System.Security;
  36     using System.Runtime.Versioning;
  37     using System.Diagnostics.Contracts;
  38
  39     internal delegate Object InternalCrossContextDelegate(Object[] args);
  40
  41     internal class ThreadHelper
  42     {
  43         [System.Security.SecuritySafeCritical]
  44         static ThreadHelper() {}
  45
  46         Delegate _start;
  47         Object _startArg = null;
  48         ExecutionContext _executionContext = null;
  49         internal ThreadHelper(Delegate start)
  50         {
  51             _start = start;
  52         }
  53
  54         internal void SetExecutionContextHelper(ExecutionContext ec)
  55         {
  56             _executionContext = ec;
  57         }
  58
  59         [System.Security.SecurityCritical]
  60         static internal ContextCallback _ccb = new ContextCallback(ThreadStart_Context);
  61
  62         [System.Security.SecurityCritical]
  63         static private void ThreadStart_Context(Object state)
  64         {
  65             ThreadHelper t = (ThreadHelper)state;
  66             if (t._start is ThreadStart)
  67             {
  68                 ((ThreadStart)t._start)();
  69             }
  70             else
  71             {
  72                 ((ParameterizedThreadStart)t._start)(t._startArg);
  73             }
  74         }
  75
  76         // call back helper
  77         #if FEATURE_CORECLR
  78         [System.Security.SecuritySafeCritical] // auto-generated
  79         #else
  80         [System.Security.SecurityCritical]
  81         #endif
  82         internal void ThreadStart(object obj)
  83         {
  84             _startArg = obj;
  85             if (_executionContext != null)
  86             {
  87                 ExecutionContext.Run(_executionContext, _ccb, (Object)this);
  88             }
  89             else
  90             {
  91                 ((ParameterizedThreadStart)_start)(obj);
  92             }
  93         }
  94
  95         // call back helper
  96         #if FEATURE_CORECLR
  97         [System.Security.SecuritySafeCritical] // auto-generated
  98         #else
  99         [System.Security.SecurityCritical]
 100         #endif
 101         internal void ThreadStart()
 102         {
 103             if (_executionContext != null)
 104             {
 105                 ExecutionContext.Run(_executionContext, _ccb, (Object)this);
 106             }
 107             else
 108             {
 109                 ((ThreadStart)_start)();
 110             }
 111         }
 112     }
 113 #if !MONO
 114     internal struct ThreadHandle
 115     {
 116         private IntPtr m_ptr;
 117
 118         internal ThreadHandle(IntPtr pThread)
 119         {
 120             m_ptr = pThread;
 121         }
 122     }
 123 #endif
 124     // deliberately not [serializable]
 125     [ClassInterface(ClassInterfaceType.None)]
 126     [ComDefaultInterface(typeof(_Thread))]
 127 [System.Runtime.InteropServices.ComVisible(true)]
 128     public sealed partial class Thread : CriticalFinalizerObject
 129 #if !MOBILE
 130     , _Thread
 131 #endif
 132     {
 133 #if !MONO
 134         /*=========================================================================
 135         ** Data accessed from managed code that needs to be defined in
 136         ** ThreadBaseObject to maintain alignment between the two classes.
 137         ** DON'T CHANGE THESE UNLESS YOU MODIFY ThreadBaseObject in vm\object.h
 138         =========================================================================*/
 139 #if FEATURE_REMOTING
 140         private Context         m_Context;
 141 #endif
 142 #if !FEATURE_CORECLR
 143         private ExecutionContext m_ExecutionContext;    // this call context follows the logical thread
 144 #endif
 145
 146         private String          m_Name;
 147         private Delegate        m_Delegate;             // Delegate
 148
 149 #if FEATURE_LEAK_CULTURE_INFO
 150         private CultureInfo     m_CurrentCulture;
 151         private CultureInfo     m_CurrentUICulture;
 152 #endif
 153         private Object          m_ThreadStartArg;
 154
 155         /*=========================================================================
 156         ** The base implementation of Thread is all native.  The following fields
 157         ** should never be used in the C# code.  They are here to define the proper
 158         ** space so the thread object may be allocated.  DON'T CHANGE THESE UNLESS
 159         ** YOU MODIFY ThreadBaseObject in vm\object.h
 160         =========================================================================*/
 161 #pragma warning disable 169
 162 #pragma warning disable 414  // These fields are not used from managed.
 163         // IntPtrs need to be together, and before ints, because IntPtrs are 64-bit
 164         //  fields on 64-bit platforms, where they will be sorted together.
 165
 166         private IntPtr  DONT_USE_InternalThread;        // Pointer
 167         private int     m_Priority;                     // INT32
 168         private int     m_ManagedThreadId;              // INT32
 169
 170 #pragma warning restore 414
 171 #pragma warning restore 169
 172
 173         private bool m_ExecutionContextBelongsToOuterScope;
 174 #if DEBUG
 175         private bool m_ForbidExecutionContextMutation;
 176 #endif
 177 #endif
 178         /*=========================================================================
 179         ** This manager is responsible for storing the global data that is
 180         ** shared amongst all the thread local stores.
 181         =========================================================================*/
 182         static private LocalDataStoreMgr s_LocalDataStoreMgr;
 183
 184         /*=========================================================================
 185         ** Thread-local data store
 186         =========================================================================*/
 187         [ThreadStatic]
 188         static private LocalDataStoreHolder s_LocalDataStore;
 189
 190         // Do not move! Order of above fields needs to be preserved for alignment
 191         // with native code
 192         // See code:#threadCultureInfo
 193 #if !FEATURE_LEAK_CULTURE_INFO
 194         [ThreadStatic]
 195         internal static CultureInfo     m_CurrentCulture;
 196         [ThreadStatic]
 197         internal static CultureInfo     m_CurrentUICulture;
 198 #endif
 199
 200         static AsyncLocal<CultureInfo> s_asyncLocalCurrentCulture;
 201         static AsyncLocal<CultureInfo> s_asyncLocalCurrentUICulture;
 202
 203         static void AsyncLocalSetCurrentCulture(AsyncLocalValueChangedArgs<CultureInfo> args)
 204         {
 205 #if FEATURE_LEAK_CULTURE_INFO
 206             Thread.CurrentThread.m_CurrentCulture = args.CurrentValue;
 207 #else
 208             m_CurrentCulture = args.CurrentValue;
 209 #endif // FEATURE_LEAK_CULTURE_INFO
 210         }
 211
 212         static void AsyncLocalSetCurrentUICulture(AsyncLocalValueChangedArgs<CultureInfo> args)
 213         {
 214 #if FEATURE_LEAK_CULTURE_INFO
 215             Thread.CurrentThread.m_CurrentUICulture = args.CurrentValue;
 216 #else
 217             m_CurrentUICulture = args.CurrentValue;
 218 #endif // FEATURE_LEAK_CULTURE_INFO
 219         }
 220
 221 #if FEATURE_CORECLR
 222         // Adding an empty default ctor for annotation purposes
 223         [System.Security.SecuritySafeCritical] // auto-generated
 224         internal Thread(){}
 225 #endif // FEATURE_CORECLR
 226
 227         /*=========================================================================
 228         ** Creates a new Thread object which will begin execution at
 229         ** start.ThreadStart on a new thread when the Start method is called.
 230         **
 231         ** Exceptions: ArgumentNullException if start == null.
 232         =========================================================================*/
 233         [System.Security.SecuritySafeCritical]  // auto-generated
 234         public Thread(ThreadStart start) {
 235             if (start == null) {
 236                 throw new ArgumentNullException("start");
 237             }
 238             Contract.EndContractBlock();
 239             SetStartHelper((Delegate)start,0);  //0 will setup Thread with default stackSize
 240         }
 241
 242         [System.Security.SecuritySafeCritical]  // auto-generated
 243         public Thread(ThreadStart start, int maxStackSize) {
 244             if (start == null) {
 245                 throw new ArgumentNullException("start");
 246             }
 247             if (0 > maxStackSize)
 248                 throw new ArgumentOutOfRangeException("maxStackSize",Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
 249             Contract.EndContractBlock();
 250             SetStartHelper((Delegate)start, maxStackSize);
 251         }
 252
 253         [System.Security.SecuritySafeCritical]  // auto-generated
 254         public Thread(ParameterizedThreadStart start) {
 255             if (start == null) {
 256                 throw new ArgumentNullException("start");
 257             }
 258             Contract.EndContractBlock();
 259             SetStartHelper((Delegate)start, 0);
 260         }
 261
 262         [System.Security.SecuritySafeCritical]  // auto-generated
 263         public Thread(ParameterizedThreadStart start, int maxStackSize) {
 264             if (start == null) {
 265                 throw new ArgumentNullException("start");
 266             }
 267             if (0 > maxStackSize)
 268                 throw new ArgumentOutOfRangeException("maxStackSize",Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegNum"));
 269             Contract.EndContractBlock();
 270             SetStartHelper((Delegate)start, maxStackSize);
 271         }
 272 #if !MONO
 273         [ComVisible(false)]
 274         public override int GetHashCode()
 275         {
 276             return m_ManagedThreadId;
 277         }
 278
 279         extern public int ManagedThreadId
 280         {
 281             [ResourceExposure(ResourceScope.None)]
 282             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 283             [MethodImplAttribute(MethodImplOptions.InternalCall)]
 284             [System.Security.SecuritySafeCritical]  // auto-generated
 285             get;
 286         }
 287
 288         // Returns handle for interop with EE. The handle is guaranteed to be non-null.
 289         internal unsafe ThreadHandle GetNativeHandle()
 290         {
 291             IntPtr thread = DONT_USE_InternalThread;
 292
 293             // This should never happen under normal circumstances. m_assembly is always assigned before it is handed out to the user.
 294             // There are ways how to create an unitialized objects through remoting, etc. Avoid AVing in the EE by throwing a nice
 295             // exception here.
 296             if (thread.IsNull())
 297                 throw new ArgumentException(null, Environment.GetResourceString("Argument_InvalidHandle"));
 298
 299             return new ThreadHandle(thread);
 300         }
 301 #endif
 302
 303         /*=========================================================================
 304         ** Spawns off a new thread which will begin executing at the ThreadStart
 305         ** method on the IThreadable interface passed in the constructor. Once the
 306         ** thread is dead, it cannot be restarted with another call to Start.
 307         **
 308         ** Exceptions: ThreadStateException if the thread has already been started.
 309         =========================================================================*/
 310         [HostProtection(Synchronization=true,ExternalThreading=true)]
 311         [MethodImplAttribute(MethodImplOptions.NoInlining)] // Methods containing StackCrawlMark local var has to be marked non-inlineable
 312         public void Start()
 313         {
 314             StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
 315             Start(ref stackMark);
 316         }
 317
 318         [HostProtection(Synchronization=true,ExternalThreading=true)]
 319         [MethodImplAttribute(MethodImplOptions.NoInlining)] // Methods containing StackCrawlMark local var has to be marked non-inlineable
 320         public void Start(object parameter)
 321         {
 322             //In the case of a null delegate (second call to start on same thread)
 323             //    StartInternal method will take care of the error reporting
 324             if(m_Delegate is ThreadStart)
 325             {
 326                 //We expect the thread to be setup with a ParameterizedThreadStart
 327                 //    if this constructor is called.
 328                 //If we got here then that wasn't the case
 329                 throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ThreadWrongThreadStart"));
 330             }
 331             m_ThreadStartArg = parameter;
 332             StackCrawlMark stackMark = StackCrawlMark.LookForMyCaller;
 333             Start(ref stackMark);
 334         }
 335
 336         [System.Security.SecuritySafeCritical]
 337         private void Start(ref StackCrawlMark stackMark)
 338         {
 339 #if FEATURE_COMINTEROP_APARTMENT_SUPPORT
 340             // Eagerly initialize the COM Apartment state of the thread if we're allowed to.
 341             StartupSetApartmentStateInternal();
 342 #endif // FEATURE_COMINTEROP_APARTMENT_SUPPORT
 343
 344             // Attach current thread's security principal object to the new
 345             // thread. Be careful not to bind the current thread to a principal
 346             // if it's not already bound.
 347             if (m_Delegate != null)
 348             {
 349                 // If we reach here with a null delegate, something is broken. But we'll let the StartInternal method take care of
 350                 // reporting an error. Just make sure we dont try to dereference a null delegate.
 351                 ThreadHelper t = (ThreadHelper)(m_Delegate.Target);
 352                 ExecutionContext ec = ExecutionContext.Capture(
 353                     ref stackMark,
 354                     ExecutionContext.CaptureOptions.IgnoreSyncCtx);
 355                 t.SetExecutionContextHelper(ec);
 356             }
 357 #if FEATURE_IMPERSONATION
 358             IPrincipal principal = (IPrincipal)CallContext.Principal;
 359 #else
 360             IPrincipal principal = null;
 361 #endif
 362             StartInternal(principal, ref stackMark);
 363         }
 364
 365
 366 #if !FEATURE_CORECLR
 367         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 368         internal ExecutionContext.Reader GetExecutionContextReader()
 369         {
 370             return new ExecutionContext.Reader(m_ExecutionContext);
 371         }
 372
 373         internal bool ExecutionContextBelongsToCurrentScope
 374         {
 375             get { return !m_ExecutionContextBelongsToOuterScope; }
 376             set { m_ExecutionContextBelongsToOuterScope = !value; }
 377         }
 378
 379 #if !MONO && DEBUG
 380         internal bool ForbidExecutionContextMutation
 381         {
 382             set { m_ForbidExecutionContextMutation = value; }
 383         }
 384 #endif
 385
 386         // note: please don't access this directly from mscorlib.  Use GetMutableExecutionContext or GetExecutionContextReader instead.
 387         public  ExecutionContext ExecutionContext
 388         {
 389             [SecuritySafeCritical]
 390             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
 391             get
 392             {
 393                 ExecutionContext result;
 394                 if (this == Thread.CurrentThread)
 395                     result = GetMutableExecutionContext();
 396                 else
 397                     result = m_ExecutionContext;
 398
 399                 return result;
 400             }
 401         }
 402
 403         [SecurityCritical]
 404         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
 405         internal ExecutionContext GetMutableExecutionContext()
 406         {
 407             Contract.Assert(Thread.CurrentThread == this);
 408 #if !MONO && DEBUG
 409             Contract.Assert(!m_ForbidExecutionContextMutation);
 410 #endif
 411             if (m_ExecutionContext == null)
 412             {
 413                 m_ExecutionContext = new ExecutionContext();
 414             }
 415             else if (!ExecutionContextBelongsToCurrentScope)
 416             {
 417                 ExecutionContext copy = m_ExecutionContext.CreateMutableCopy();
 418                 m_ExecutionContext = copy;
 419             }
 420
 421             ExecutionContextBelongsToCurrentScope = true;
 422             return m_ExecutionContext;
 423         }
 424
 425         [SecurityCritical]
 426         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 427         internal void SetExecutionContext(ExecutionContext value, bool belongsToCurrentScope)
 428         {
 429             m_ExecutionContext = value;
 430             ExecutionContextBelongsToCurrentScope = belongsToCurrentScope;
 431         }
 432
 433         [SecurityCritical]
 434         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 435         internal void SetExecutionContext(ExecutionContext.Reader value, bool belongsToCurrentScope)
 436         {
 437             m_ExecutionContext = value.DangerousGetRawExecutionContext();
 438             ExecutionContextBelongsToCurrentScope = belongsToCurrentScope;
 439         }
 440 #endif //!FEATURE_CORECLR
 441
 442 #if !MONO
 443         [System.Security.SecurityCritical]  // auto-generated
 444         [ResourceExposure(ResourceScope.None)]
 445         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 446         private extern void StartInternal(IPrincipal principal, ref StackCrawlMark stackMark);
 447 #endif
 448 #if FEATURE_COMPRESSEDSTACK || MONO
 449         /// <internalonly/>
 450         [System.Security.SecurityCritical]  // auto-generated_required
 451         [DynamicSecurityMethodAttribute()]
 452         [Obsolete("Thread.SetCompressedStack is no longer supported. Please use the System.Threading.CompressedStack class")]
 453         public void SetCompressedStack( CompressedStack stack )
 454         {
 455             throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ThreadAPIsNotSupported"));
 456         }
 457 #if !MONO
 458         [System.Security.SecurityCritical]  // auto-generated
 459         [ResourceExposure(ResourceScope.None)]
 460         [MethodImplAttribute(MethodImplOptions.InternalCall), ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 461         internal extern IntPtr SetAppDomainStack( SafeCompressedStackHandle csHandle);
 462
 463         [System.Security.SecurityCritical]  // auto-generated
 464         [ResourceExposure(ResourceScope.None)]
 465         [MethodImplAttribute(MethodImplOptions.InternalCall), ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 466         internal extern void RestoreAppDomainStack( IntPtr appDomainStack);
 467 #endif
 468
 469         /// <internalonly/>
 470         [System.Security.SecurityCritical]  // auto-generated_required
 471         [Obsolete("Thread.GetCompressedStack is no longer supported. Please use the System.Threading.CompressedStack class")]
 472         public CompressedStack GetCompressedStack()
 473         {
 474             throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ThreadAPIsNotSupported"));
 475         }
 476 #endif // #if FEATURE_COMPRESSEDSTACK
 477 #if !MONO
 478
 479         // Helper method to get a logical thread ID for StringBuilder (for
 480         // correctness) and for FileStream's async code path (for perf, to
 481         // avoid creating a Thread instance).
 482         [System.Security.SecurityCritical]  // auto-generated
 483         [ResourceExposure(ResourceScope.None)]
 484         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 485         internal extern static IntPtr InternalGetCurrentThread();
 486
 487         /*=========================================================================
 488         ** Raises a ThreadAbortException in the thread, which usually
 489         ** results in the thread's death. The ThreadAbortException is a special
 490         ** exception that is not catchable. The finally clauses of all try
 491         ** statements will be executed before the thread dies. This includes the
 492         ** finally that a thread might be executing at the moment the Abort is raised.
 493         ** The thread is not stopped immediately--you must Join on the
 494         ** thread to guarantee it has stopped.
 495         ** It is possible for a thread to do an unbounded amount of computation in
 496         ** the finally's and thus indefinitely delay the threads death.
 497         ** If Abort() is called on a thread that has not been started, the thread
 498         ** will abort when Start() is called.
 499         ** If Abort is called twice on the same thread, a DuplicateThreadAbort
 500         ** exception is thrown.
 501         =========================================================================*/
 502
 503 #if !FEATURE_CORECLR
 504         [System.Security.SecuritySafeCritical]  // auto-generated
 505         [SecurityPermissionAttribute(SecurityAction.Demand, ControlThread=true)]
 506         public void Abort(Object stateInfo)
 507         {
 508             // If two aborts come at the same time, it is possible that the state info
 509             //  gets set by one, and the actual abort gets delivered by another. But this
 510             //  is not distinguishable by an application.
 511             // The accessor helper will only set the value if it isn't already set,
 512             //  and that particular bit of native code can test much faster than this
 513             //  code could, because testing might cause a cross-appdomain marshalling.
 514             AbortReason = stateInfo;
 515
 516             // Note: we demand ControlThread permission, then call AbortInternal directly
 517             // rather than delegating to the Abort() function below. We do this to ensure
 518             // that only callers with ControlThread are allowed to change the AbortReason
 519             // of the thread. We call AbortInternal directly to avoid demanding the same
 520             // permission twice.
 521             AbortInternal();
 522         }
 523 #endif
 524
 525         #if FEATURE_CORECLR
 526         [System.Security.SecurityCritical] // auto-generated
 527         #else
 528         [System.Security.SecuritySafeCritical]
 529         #endif
 530 #pragma warning disable 618
 531         [SecurityPermissionAttribute(SecurityAction.Demand, ControlThread = true)]
 532 #pragma warning restore 618
 533         public void Abort()
 534         {
 535 #if FEATURE_LEGACYNETCF
 536             if(CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
 537             {
 538                 System.Reflection.Assembly callingAssembly = System.Reflection.Assembly.GetCallingAssembly();
 539                 if(callingAssembly != null && !callingAssembly.IsProfileAssembly)
 540                 {
 541                     string caller = new StackFrame(1).GetMethod().FullName;
 542                     string callee = System.Reflection.MethodBase.GetCurrentMethod().FullName;
 543                     throw new MethodAccessException(String.Format(
 544                         CultureInfo.CurrentCulture,
 545                         Environment.GetResourceString("Arg_MethodAccessException_WithCaller"),
 546                         caller,
 547                         callee));
 548                 }
 549             }
 550 #endif // FEATURE_LEGACYNETCF
 551             AbortInternal();
 552         }
 553
 554         // Internal helper (since we can't place security demands on
 555         // ecalls/fcalls).
 556         [System.Security.SecurityCritical]  // auto-generated
 557         [ResourceExposure(ResourceScope.None)]
 558         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 559         private extern void AbortInternal();
 560 #endif
 561 #if (!FEATURE_CORECLR && !MONO) || MONO_FEATURE_THREAD_ABORT
 562         /*=========================================================================
 563         ** Resets a thread abort.
 564         ** Should be called by trusted code only
 565           =========================================================================*/
 566         [System.Security.SecuritySafeCritical]  // auto-generated
 567         [SecurityPermissionAttribute(SecurityAction.Demand, ControlThread=true)]
 568         public static void ResetAbort()
 569         {
 570             Thread thread = Thread.CurrentThread;
 571             if ((thread.ThreadState & ThreadState.AbortRequested) == 0)
 572                 throw new ThreadStateException(Environment.GetResourceString("ThreadState_NoAbortRequested"));
 573             thread.ResetAbortNative();
 574             thread.ClearAbortReason();
 575         }
 576
 577         [System.Security.SecurityCritical]  // auto-generated
 578         [ResourceExposure(ResourceScope.None)]
 579         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 580         private extern void ResetAbortNative();
 581 #endif
 582 #if (!FEATURE_CORECLR && !MONO) || MONO_FEATURE_THREAD_SUSPEND_RESUME
 583         /*=========================================================================
 584         ** Suspends the thread. If the thread is already suspended, this call has
 585         ** no effect.
 586         **
 587         ** Exceptions: ThreadStateException if the thread has not been started or
 588         **             it is dead.
 589         =========================================================================*/
 590         [System.Security.SecuritySafeCritical]  // auto-generated
 591         [Obsolete("Thread.Suspend has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202", false)][SecurityPermission(SecurityAction.Demand, ControlThread=true)]
 592         [SecurityPermission(SecurityAction.Demand, ControlThread=true)]
 593         public void Suspend() { SuspendInternal(); }
 594
 595         // Internal helper (since we can't place security demands on
 596         // ecalls/fcalls).
 597         [System.Security.SecurityCritical]  // auto-generated
 598         [ResourceExposure(ResourceScope.None)]
 599         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 600         private extern void SuspendInternal();
 601
 602         /*=========================================================================
 603         ** Resumes a thread that has been suspended.
 604         **
 605         ** Exceptions: ThreadStateException if the thread has not been started or
 606         **             it is dead or it isn't in the suspended state.
 607         =========================================================================*/
 608         [System.Security.SecuritySafeCritical]  // auto-generated
 609         [Obsolete("Thread.Resume has been deprecated.  Please use other classes in System.Threading, such as Monitor, Mutex, Event, and Semaphore, to synchronize Threads or protect resources.  http://go.microsoft.com/fwlink/?linkid=14202", false)]
 610         [SecurityPermission(SecurityAction.Demand, ControlThread=true)]
 611         public void Resume() { ResumeInternal(); }
 612
 613         // Internal helper (since we can't place security demands on
 614         // ecalls/fcalls).
 615         [System.Security.SecurityCritical]  // auto-generated
 616         [ResourceExposure(ResourceScope.None)]
 617         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 618         private extern void ResumeInternal();
 619 #endif
 620
 621 #if !FEATURE_CORECLR || MONO
 622         /*=========================================================================
 623         ** Interrupts a thread that is inside a Wait(), Sleep() or Join().  If that
 624         ** thread is not currently blocked in that manner, it will be interrupted
 625         ** when it next begins to block.
 626         =========================================================================*/
 627         [System.Security.SecuritySafeCritical]  // auto-generated
 628         [SecurityPermission(SecurityAction.Demand, ControlThread=true)]
 629         public void Interrupt() { InterruptInternal(); }
 630
 631         // Internal helper (since we can't place security demands on
 632         // ecalls/fcalls).
 633         [System.Security.SecurityCritical]  // auto-generated
 634         [ResourceExposure(ResourceScope.None)]
 635         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 636         private extern void InterruptInternal();
 637 #endif
 638
 639         /*=========================================================================
 640         ** Returns the priority of the thread.
 641         **
 642         ** Exceptions: ThreadStateException if the thread is dead.
 643         =========================================================================*/
 644
 645         public ThreadPriority Priority {
 646             [System.Security.SecuritySafeCritical]  // auto-generated
 647             get { return (ThreadPriority)GetPriorityNative(); }
 648             [System.Security.SecuritySafeCritical]  // auto-generated
 649             [HostProtection(SelfAffectingThreading=true)]
 650             set { SetPriorityNative((int)value); }
 651         }
 652         [System.Security.SecurityCritical]  // auto-generated
 653         [ResourceExposure(ResourceScope.None)]
 654         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 655         private extern int GetPriorityNative();
 656         [System.Security.SecurityCritical]  // auto-generated
 657         [ResourceExposure(ResourceScope.None)]
 658         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 659         private extern void SetPriorityNative(int priority);
 660 #if !MONO
 661         /*=========================================================================
 662         ** Returns true if the thread has been started and is not dead.
 663         =========================================================================*/
 664         public extern bool IsAlive {
 665             [System.Security.SecuritySafeCritical]  // auto-generated
 666             [MethodImpl(MethodImplOptions.InternalCall)]
 667             get;
 668         }
 669
 670         /*=========================================================================
 671         ** Returns true if the thread is a threadpool thread.
 672         =========================================================================*/
 673         public extern bool IsThreadPoolThread {
 674             [System.Security.SecuritySafeCritical]  // auto-generated
 675             [MethodImpl(MethodImplOptions.InternalCall)]
 676             get;
 677         }
 678 #endif
 679         /*=========================================================================
 680         ** Waits for the thread to die or for timeout milliseconds to elapse.
 681         ** Returns true if the thread died, or false if the wait timed out. If
 682         ** Timeout.Infinite is given as the parameter, no timeout will occur.
 683         **
 684         ** Exceptions: ArgumentException if timeout < 0.
 685         **             ThreadInterruptedException if the thread is interrupted while waiting.
 686         **             ThreadStateException if the thread has not been started yet.
 687         =========================================================================*/
 688         [System.Security.SecurityCritical]
 689         [ResourceExposure(ResourceScope.None)]
 690         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 691         private extern bool JoinInternal(int millisecondsTimeout);
 692
 693         [System.Security.SecuritySafeCritical]
 694         [HostProtection(Synchronization=true, ExternalThreading=true)]
 695         public void Join()
 696         {
 697             JoinInternal(Timeout.Infinite);
 698         }
 699
 700         [System.Security.SecuritySafeCritical]
 701         [HostProtection(Synchronization=true, ExternalThreading=true)]
 702         public bool Join(int millisecondsTimeout)
 703         {
 704 #if MONO
 705             if (millisecondsTimeout < Timeout.Infinite)
 706                 throw new ArgumentOutOfRangeException("millisecondsTimeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1"));
 707 #endif
 708             return JoinInternal(millisecondsTimeout);
 709         }
 710
 711         [HostProtection(Synchronization=true, ExternalThreading=true)]
 712         public bool Join(TimeSpan timeout)
 713         {
 714             long tm = (long)timeout.TotalMilliseconds;
 715             if (tm < -1 || tm > (long) Int32.MaxValue)
 716                 throw new ArgumentOutOfRangeException("timeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1"));
 717
 718             return Join((int)tm);
 719         }
 720
 721         /*=========================================================================
 722         ** Suspends the current thread for timeout milliseconds. If timeout == 0,
 723         ** forces the thread to give up the remainer of its timeslice.  If timeout
 724         ** == Timeout.Infinite, no timeout will occur.
 725         **
 726         ** Exceptions: ArgumentException if timeout < 0.
 727         **             ThreadInterruptedException if the thread is interrupted while sleeping.
 728         =========================================================================*/
 729         [System.Security.SecurityCritical]  // auto-generated
 730         [ResourceExposure(ResourceScope.None)]
 731         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 732         private static extern void SleepInternal(int millisecondsTimeout);
 733
 734         [System.Security.SecuritySafeCritical]  // auto-generated
 735         public static void Sleep(int millisecondsTimeout)
 736         {
 737 #if MONO
 738             if (millisecondsTimeout < Timeout.Infinite)
 739                 throw new ArgumentOutOfRangeException("millisecondsTimeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1"));
 740 #endif
 741             SleepInternal(millisecondsTimeout);
 742 #if !MONO
 743             // Ensure we don't return to app code when the pause is underway
 744             if(AppDomainPauseManager.IsPaused)
 745                 AppDomainPauseManager.ResumeEvent.WaitOneWithoutFAS();
 746 #endif
 747         }
 748
 749         public static void Sleep(TimeSpan timeout)
 750         {
 751             long tm = (long)timeout.TotalMilliseconds;
 752             if (tm < -1 || tm > (long) Int32.MaxValue)
 753                 throw new ArgumentOutOfRangeException("timeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1"));
 754             Sleep((int)tm);
 755         }
 756
 757 #if !MONO
 758         /* wait for a length of time proportial to 'iterations'.  Each iteration is should
 759            only take a few machine instructions.  Calling this API is preferable to coding
 760            a explict busy loop because the hardware can be informed that it is busy waiting. */
 761
 762         [System.Security.SecurityCritical]  // auto-generated
 763         [MethodImplAttribute(MethodImplOptions.InternalCall),
 764          HostProtection(Synchronization=true,ExternalThreading=true),
 765          ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success),
 766          ResourceExposure(ResourceScope.None)]
 767         private static extern void SpinWaitInternal(int iterations);
 768
 769         [System.Security.SecuritySafeCritical]  // auto-generated
 770         [HostProtection(Synchronization=true,ExternalThreading=true),
 771          ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 772         public static void SpinWait(int iterations)
 773         {
 774             SpinWaitInternal(iterations);
 775         }
 776 #endif
 777         [System.Security.SecurityCritical]  // auto-generated
 778         [ResourceExposure(ResourceScope.None)]
 779         [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
 780         [SuppressUnmanagedCodeSecurity]
 781         [HostProtection(Synchronization = true, ExternalThreading = true),
 782          ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 783         private static extern bool YieldInternal();
 784
 785         [System.Security.SecuritySafeCritical]  // auto-generated
 786         [HostProtection(Synchronization = true, ExternalThreading = true),
 787          ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 788         public static bool Yield()
 789         {
 790             return YieldInternal();
 791         }
 792
 793 #if !MONO
 794         public static Thread CurrentThread {
 795             [System.Security.SecuritySafeCritical]  // auto-generated
 796             [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
 797             get {
 798                 Contract.Ensures(Contract.Result<Thread>() != null);
 799                 return GetCurrentThreadNative();
 800             }
 801         }
 802         [System.Security.SecurityCritical]  // auto-generated
 803         [ResourceExposure(ResourceScope.None)]
 804         [MethodImplAttribute(MethodImplOptions.InternalCall), ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
 805         private static extern Thread GetCurrentThreadNative();
 806 #endif
 807         [System.Security.SecurityCritical]  // auto-generated
 808         private void SetStartHelper(Delegate start, int maxStackSize)
 809         {
 810 #if MONO
 811             maxStackSize = GetProcessDefaultStackSize(maxStackSize);
 812 #else
 813 #if FEATURE_CORECLR
 814             // We only support default stacks in CoreCLR
 815             Contract.Assert(maxStackSize == 0);
 816 #else
 817             // Only fully-trusted code is allowed to create "large" stacks.  Partial-trust falls back to
 818             // the default stack size.
 819             ulong defaultStackSize = GetProcessDefaultStackSize();
 820
 821             if ((ulong)(uint)maxStackSize > defaultStackSize)
 822             {
 823                 try
 824                 {
 825                     SecurityPermission.Demand(PermissionType.FullTrust);
 826                 }
 827                 catch (SecurityException)
 828                 {
 829                     maxStackSize = (int)Math.Min(defaultStackSize, (ulong)(uint)int.MaxValue);
 830                 }
 831             }
 832 #endif
 833 #endif
 834
 835             ThreadHelper threadStartCallBack = new ThreadHelper(start);
 836             if(start is ThreadStart)
 837             {
 838                 SetStart(new ThreadStart(threadStartCallBack.ThreadStart), maxStackSize);
 839             }
 840             else
 841             {
 842                 SetStart(new ParameterizedThreadStart(threadStartCallBack.ThreadStart), maxStackSize);
 843             }
 844         }
 845 #if !MONO
 846         [SecurityCritical]
 847         [ResourceExposure(ResourceScope.None)]
 848         [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
 849         [SuppressUnmanagedCodeSecurity]
 850         private static extern ulong GetProcessDefaultStackSize();
 851
 852         /*=========================================================================
 853         ** PRIVATE Sets the IThreadable interface for the thread. Assumes that
 854         ** start != null.
 855         =========================================================================*/
 856         [System.Security.SecurityCritical]  // auto-generated
 857         [ResourceExposure(ResourceScope.None)]
 858         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 859         private extern void SetStart(Delegate start, int maxStackSize);
 860
 861         /*=========================================================================
 862         ** Clean up the thread when it goes away.
 863         =========================================================================*/
 864         [System.Security.SecuritySafeCritical]  // auto-generated
 865         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 866         ~Thread()
 867         {
 868             // Delegate to the unmanaged portion.
 869             InternalFinalize();
 870         }
 871
 872         [System.Security.SecurityCritical]  // auto-generated
 873         [ResourceExposure(ResourceScope.None)]
 874         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 875         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 876         private extern void InternalFinalize();
 877
 878 #if FEATURE_COMINTEROP
 879         [System.Security.SecurityCritical]  // auto-generated
 880         [ResourceExposure(ResourceScope.None)]
 881         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
 882         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 883         public extern void DisableComObjectEagerCleanup();
 884 #endif //FEATURE_COMINTEROP
 885
 886         /*=========================================================================
 887         ** Return whether or not this thread is a background thread.  Background
 888         ** threads do not affect when the Execution Engine shuts down.
 889         **
 890         ** Exceptions: ThreadStateException if the thread is dead.
 891         =========================================================================*/
 892         public bool IsBackground {
 893             [System.Security.SecuritySafeCritical]  // auto-generated
 894             get { return IsBackgroundNative(); }
 895             [System.Security.SecuritySafeCritical]  // auto-generated
 896             [HostProtection(SelfAffectingThreading=true)]
 897             set { SetBackgroundNative(value); }
 898         }
 899         [System.Security.SecurityCritical]  // auto-generated
 900         [ResourceExposure(ResourceScope.None)]
 901         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 902         private extern bool IsBackgroundNative();
 903         [System.Security.SecurityCritical]  // auto-generated
 904         [ResourceExposure(ResourceScope.None)]
 905         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 906         private extern void SetBackgroundNative(bool isBackground);
 907
 908
 909         /*=========================================================================
 910         ** Return the thread state as a consistent set of bits.  This is more
 911         ** general then IsAlive or IsBackground.
 912         =========================================================================*/
 913         public ThreadState ThreadState {
 914             [System.Security.SecuritySafeCritical]  // auto-generated
 915             get { return (ThreadState)GetThreadStateNative(); }
 916         }
 917
 918         [System.Security.SecurityCritical]  // auto-generated
 919         [ResourceExposure(ResourceScope.None)]
 920         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 921         private extern int GetThreadStateNative();
 922
 923 #if FEATURE_COMINTEROP_APARTMENT_SUPPORT
 924         /*=========================================================================
 925         ** An unstarted thread can be marked to indicate that it will host a
 926         ** single-threaded or multi-threaded apartment.
 927         **
 928         ** Exceptions: ArgumentException if state is not a valid apartment state
 929         **             (ApartmentSTA or ApartmentMTA).
 930         =========================================================================*/
 931         [Obsolete("The ApartmentState property has been deprecated.  Use GetApartmentState, SetApartmentState or TrySetApartmentState instead.", false)]
 932         public ApartmentState ApartmentState
 933         {
 934             [System.Security.SecuritySafeCritical]  // auto-generated
 935             get
 936             {
 937                 return (ApartmentState)GetApartmentStateNative();
 938             }
 939
 940             [System.Security.SecuritySafeCritical]  // auto-generated
 941             [HostProtection(Synchronization=true, SelfAffectingThreading=true)]
 942             set
 943             {
 944                 SetApartmentStateNative((int)value, true);
 945             }
 946         }
 947
 948         [System.Security.SecuritySafeCritical]  // auto-generated
 949         public ApartmentState GetApartmentState()
 950         {
 951             return (ApartmentState)GetApartmentStateNative();
 952         }
 953
 954         [System.Security.SecuritySafeCritical]  // auto-generated
 955         [HostProtection(Synchronization=true, SelfAffectingThreading=true)]
 956         public bool TrySetApartmentState(ApartmentState state)
 957         {
 958             return SetApartmentStateHelper(state, false);
 959         }
 960
 961         [System.Security.SecuritySafeCritical]  // auto-generated
 962         [HostProtection(Synchronization=true, SelfAffectingThreading=true)]
 963         public void SetApartmentState(ApartmentState state)
 964         {
 965             bool result = SetApartmentStateHelper(state, true);
 966             if (!result)
 967                 throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ApartmentStateSwitchFailed"));
 968         }
 969
 970         [System.Security.SecurityCritical]  // auto-generated
 971         private bool SetApartmentStateHelper(ApartmentState state, bool fireMDAOnMismatch)
 972         {
 973             ApartmentState retState = (ApartmentState)SetApartmentStateNative((int)state, fireMDAOnMismatch);
 974
 975             // Special case where we pass in Unknown and get back MTA.
 976             //  Once we CoUninitialize the thread, the OS will still
 977             //  report the thread as implicitly in the MTA if any
 978             //  other thread in the process is CoInitialized.
 979             if ((state == System.Threading.ApartmentState.Unknown) && (retState == System.Threading.ApartmentState.MTA))
 980                 return true;
 981
 982             if (retState != state)
 983                 return false;
 984
 985             return true;
 986         }
 987
 988         [System.Security.SecurityCritical]  // auto-generated
 989         [ResourceExposure(ResourceScope.None)]
 990         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 991         private extern int GetApartmentStateNative();
 992         [System.Security.SecurityCritical]  // auto-generated
 993         [ResourceExposure(ResourceScope.None)]
 994         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 995         private extern int SetApartmentStateNative(int state, bool fireMDAOnMismatch);
 996         [System.Security.SecurityCritical]  // auto-generated
 997         [ResourceExposure(ResourceScope.None)]
 998         [MethodImplAttribute(MethodImplOptions.InternalCall)]
 999         private extern void StartupSetApartmentStateInternal();
1000 #endif // FEATURE_COMINTEROP_APARTMENT_SUPPORT
1001 #endif
1002         /*=========================================================================
1003         ** Allocates an un-named data slot. The slot is allocated on ALL the
1004         ** threads.
1005         =========================================================================*/
1006         [HostProtection(SharedState=true, ExternalThreading=true)]
1007         public static LocalDataStoreSlot AllocateDataSlot()
1008         {
1009             return LocalDataStoreManager.AllocateDataSlot();
1010         }
1011
1012         /*=========================================================================
1013         ** Allocates a named data slot. The slot is allocated on ALL the
1014         ** threads.  Named data slots are "public" and can be manipulated by
1015         ** anyone.
1016         =========================================================================*/
1017         [HostProtection(SharedState=true, ExternalThreading=true)]
1018         public static LocalDataStoreSlot AllocateNamedDataSlot(String name)
1019         {
1020             return LocalDataStoreManager.AllocateNamedDataSlot(name);
1021         }
1022
1023         /*=========================================================================
1024         ** Looks up a named data slot. If the name has not been used, a new slot is
1025         ** allocated.  Named data slots are "public" and can be manipulated by
1026         ** anyone.
1027         =========================================================================*/
1028         [HostProtection(SharedState=true, ExternalThreading=true)]
1029         public static LocalDataStoreSlot GetNamedDataSlot(String name)
1030         {
1031             return LocalDataStoreManager.GetNamedDataSlot(name);
1032         }
1033
1034         /*=========================================================================
1035         ** Frees a named data slot. The slot is allocated on ALL the
1036         ** threads.  Named data slots are "public" and can be manipulated by
1037         ** anyone.
1038         =========================================================================*/
1039         [HostProtection(SharedState=true, ExternalThreading=true)]
1040         public static void FreeNamedDataSlot(String name)
1041         {
1042             LocalDataStoreManager.FreeNamedDataSlot(name);
1043         }
1044
1045         /*=========================================================================
1046         ** Retrieves the value from the specified slot on the current thread, for that thread's current domain.
1047         =========================================================================*/
1048         [HostProtection(SharedState=true, ExternalThreading=true)]
1049         [ResourceExposure(ResourceScope.AppDomain)]
1050         public static Object GetData(LocalDataStoreSlot slot)
1051         {
1052             LocalDataStoreHolder dls = s_LocalDataStore;
1053             if (dls == null)
1054             {
1055                 // Make sure to validate the slot even if we take the quick path
1056                 LocalDataStoreManager.ValidateSlot(slot);
1057                 return null;
1058             }
1059
1060             return dls.Store.GetData(slot);
1061         }
1062
1063         /*=========================================================================
1064         ** Sets the data in the specified slot on the currently running thread, for that thread's current domain.
1065         =========================================================================*/
1066         [HostProtection(SharedState=true, ExternalThreading=true)]
1067         [ResourceExposure(ResourceScope.AppDomain)]
1068         public static void SetData(LocalDataStoreSlot slot, Object data)
1069         {
1070             LocalDataStoreHolder dls = s_LocalDataStore;
1071
1072             // Create new DLS if one hasn't been created for this domain for this thread
1073             if (dls == null) {
1074                 dls = LocalDataStoreManager.CreateLocalDataStore();
1075                 s_LocalDataStore = dls;
1076             }
1077
1078             dls.Store.SetData(slot, data);
1079         }
1080 #if !MONO
1081
1082         // #threadCultureInfo
1083         //
1084         // Background:
1085         // In the desktop runtime, we allow a thread's cultures to travel with the thread
1086         // across AppDomain boundaries. Furthermore we update the native thread with the
1087         // culture of the managed thread. Because of security concerns and potential SxS
1088         // effects, in Silverlight we are making the changes listed below.
1089         //
1090         // Silverlight Changes:
1091         // - thread instance member cultures (CurrentCulture and CurrentUICulture)
1092         //   confined within AppDomains
1093         // - changes to these properties don't affect the underlying native thread
1094         //
1095         // Ifdef:
1096         // FEATURE_LEAK_CULTURE_INFO      : CultureInfos can leak across AppDomains, not
1097         //                                  enabled in Silverlight
1098         //
1099         // Implementation notes:
1100         // In Silverlight, culture members thread static (per Thread, per AppDomain).
1101         //
1102         // Quirks:
1103         // An interesting side-effect of isolating cultures within an AppDomain is that we
1104         // now need to special case resource lookup for mscorlib, which transitions to the
1105         // default domain to lookup resources. See Environment.cs for more details.
1106         //
1107 #if FEATURE_LEAK_CULTURE_INFO
1108         [System.Security.SecurityCritical]  // auto-generated
1109         [ResourceExposure(ResourceScope.None)]
1110         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1111         static extern private bool nativeGetSafeCulture(Thread t, int appDomainId, bool isUI, ref CultureInfo safeCulture);
1112 #endif // FEATURE_LEAK_CULTURE_INFO
1113
1114         // As the culture can be customized object then we cannot hold any
1115         // reference to it before we check if it is safe because the app domain
1116         // owning this customized culture may get unloaded while executing this
1117         // code. To achieve that we have to do the check using nativeGetSafeCulture
1118         // as the thread cannot get interrupted during the FCALL.
1119         // If the culture is safe (not customized or created in current app domain)
1120         // then the FCALL will return a reference to that culture otherwise the
1121         // FCALL will return failure. In case of failure we'll return the default culture.
1122         // If the app domain owning a customized culture that is set to teh thread and this
1123         // app domain get unloaded there is a code to clean up the culture from the thread
1124         // using the code in AppDomain::ReleaseDomainStores.
1125
1126         public CultureInfo CurrentUICulture {
1127             get {
1128                 Contract.Ensures(Contract.Result<CultureInfo>() != null);
1129 #if FEATURE_APPX
1130                 if(AppDomain.IsAppXModel()) {
1131                     return CultureInfo.GetCultureInfoForUserPreferredLanguageInAppX() ?? GetCurrentUICultureNoAppX();
1132                 }
1133                 else
1134 #endif
1135                 {
1136                     return GetCurrentUICultureNoAppX();
1137                 }
1138             }
1139
1140             [System.Security.SecuritySafeCritical]  // auto-generated
1141             [HostProtection(ExternalThreading=true)]
1142             set {
1143                 if (value == null) {
1144                     throw new ArgumentNullException("value");
1145                 }
1146                 Contract.EndContractBlock();
1147
1148                 //If they're trying to use a Culture with a name that we can't use in resource lookup,
1149                 //don't even let them set it on the thread.
1150                 CultureInfo.VerifyCultureName(value, true);
1151
1152                 // If you add more pre-conditions to this method, check to see if you also need to
1153                 // add them to CultureInfo.DefaultThreadCurrentUICulture.set.
1154
1155 #if FEATURE_LEAK_CULTURE_INFO
1156                 if (nativeSetThreadUILocale(value.SortName) == false)
1157                 {
1158                     throw new ArgumentException(Environment.GetResourceString("Argument_InvalidResourceCultureName", value.Name));
1159                 }
1160                 value.StartCrossDomainTracking();
1161 #else
1162                 if (m_CurrentUICulture == null && m_CurrentCulture == null)
1163                     nativeInitCultureAccessors();
1164 #endif
1165
1166 #if FEATURE_LEGACYNETCF
1167                 if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
1168                 {
1169                     //
1170                     // NetCF had a
1171
1172
1173
1174
1175
1176                     CultureInfo.SetCurrentUICultureQuirk(value);
1177                     return;
1178                 }
1179 #endif
1180                 if (!AppContextSwitches.NoAsyncCurrentCulture)
1181                 {
1182                     if (s_asyncLocalCurrentUICulture == null)
1183                     {
1184                         Interlocked.CompareExchange(ref s_asyncLocalCurrentUICulture, new AsyncLocal<CultureInfo>(AsyncLocalSetCurrentUICulture), null);
1185                     }
1186
1187                     // this one will set m_CurrentUICulture too
1188                     s_asyncLocalCurrentUICulture.Value = value;
1189                 }
1190                 else
1191                 {
1192                     m_CurrentUICulture = value;
1193                 }
1194             }
1195         }
1196
1197 #if FEATURE_LEAK_CULTURE_INFO
1198         [System.Security.SecuritySafeCritical]  // auto-generated
1199 #endif
1200         internal CultureInfo GetCurrentUICultureNoAppX() {
1201
1202             Contract.Ensures(Contract.Result<CultureInfo>() != null);
1203
1204             // Fetch a local copy of m_CurrentUICulture to
1205             // avoid ----s that malicious user can introduce
1206             if (m_CurrentUICulture == null) {
1207                 CultureInfo appDomainDefaultUICulture = CultureInfo.DefaultThreadCurrentUICulture;
1208                 return (appDomainDefaultUICulture != null ? appDomainDefaultUICulture : CultureInfo.UserDefaultUICulture);
1209             }
1210
1211 #if FEATURE_LEAK_CULTURE_INFO
1212             CultureInfo culture = null;
1213
1214             if (!nativeGetSafeCulture(this, GetDomainID(), true, ref culture) || culture == null) {
1215                 return CultureInfo.UserDefaultUICulture;
1216             }
1217
1218             return culture;
1219 #else
1220             return m_CurrentUICulture;
1221 #endif
1222         }
1223
1224         // This returns the exposed context for a given context ID.
1225 #if FEATURE_LEAK_CULTURE_INFO
1226         [System.Security.SecurityCritical]  // auto-generated
1227         [ResourceExposure(ResourceScope.None)]
1228         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1229         static extern private bool nativeSetThreadUILocale(String locale);
1230 #endif
1231
1232         // As the culture can be customized object then we cannot hold any
1233         // reference to it before we check if it is safe because the app domain
1234         // owning this customized culture may get unloaded while executing this
1235         // code. To achieve that we have to do the check using nativeGetSafeCulture
1236         // as the thread cannot get interrupted during the FCALL.
1237         // If the culture is safe (not customized or created in current app domain)
1238         // then the FCALL will return a reference to that culture otherwise the
1239         // FCALL will return failure. In case of failure we'll return the default culture.
1240         // If the app domain owning a customized culture that is set to teh thread and this
1241         // app domain get unloaded there is a code to clean up the culture from the thread
1242         // using the code in AppDomain::ReleaseDomainStores.
1243
1244         public CultureInfo CurrentCulture {
1245             get {
1246                 Contract.Ensures(Contract.Result<CultureInfo>() != null);
1247
1248 #if FEATURE_APPX
1249                 if(AppDomain.IsAppXModel()) {
1250                     return CultureInfo.GetCultureInfoForUserPreferredLanguageInAppX() ?? GetCurrentCultureNoAppX();
1251                 }
1252                 else
1253 #endif
1254                 {
1255                     return GetCurrentCultureNoAppX();
1256                 }
1257             }
1258
1259             [System.Security.SecuritySafeCritical]  // auto-generated
1260 #if FEATURE_LEAK_CULTURE_INFO
1261             [SecurityPermission(SecurityAction.Demand, ControlThread = true)]
1262 #endif
1263             set {
1264                 if (null==value) {
1265                     throw new ArgumentNullException("value");
1266                 }
1267                 Contract.EndContractBlock();
1268
1269                 // If you add more pre-conditions to this method, check to see if you also need to
1270                 // add them to CultureInfo.DefaultThreadCurrentCulture.set.
1271
1272 #if FEATURE_LEAK_CULTURE_INFO
1273                 //If we can't set the nativeThreadLocale, we'll just let it stay
1274                 //at whatever value it had before.  This allows people who use
1275                 //just managed code not to be limited by the underlying OS.
1276                 CultureInfo.nativeSetThreadLocale(value.SortName);
1277                 value.StartCrossDomainTracking();
1278 #else
1279                 if (m_CurrentCulture == null && m_CurrentUICulture == null)
1280                     nativeInitCultureAccessors();
1281 #endif
1282
1283 #if FEATURE_LEGACYNETCF
1284                 if (CompatibilitySwitches.IsAppEarlierThanWindowsPhone8)
1285                 {
1286                     // See comment in CurrentUICulture setter
1287                     CultureInfo.SetCurrentCultureQuirk(value);
1288                     return;
1289                 }
1290 #endif
1291                 if (!AppContextSwitches.NoAsyncCurrentCulture)
1292                 {
1293                     if (s_asyncLocalCurrentCulture == null)
1294                     {
1295                         Interlocked.CompareExchange(ref s_asyncLocalCurrentCulture, new AsyncLocal<CultureInfo>(AsyncLocalSetCurrentCulture), null);
1296                     }
1297                     // this one will set m_CurrentCulture too
1298                     s_asyncLocalCurrentCulture.Value = value;
1299                 }
1300                 else
1301                 {
1302                     m_CurrentCulture = value;
1303                 }
1304             }
1305         }
1306
1307 #if FEATURE_LEAK_CULTURE_INFO
1308         [System.Security.SecuritySafeCritical]  // auto-generated
1309 #endif
1310         private CultureInfo GetCurrentCultureNoAppX() {
1311
1312             Contract.Ensures(Contract.Result<CultureInfo>() != null);
1313
1314             // Fetch a local copy of m_CurrentCulture to
1315             // avoid ----s that malicious user can introduce
1316             if (m_CurrentCulture == null) {
1317                 CultureInfo appDomainDefaultCulture =  CultureInfo.DefaultThreadCurrentCulture;
1318                 return (appDomainDefaultCulture != null ? appDomainDefaultCulture : CultureInfo.UserDefaultCulture);
1319             }
1320
1321 #if FEATURE_LEAK_CULTURE_INFO
1322             CultureInfo culture = null;
1323
1324             if (!nativeGetSafeCulture(this, GetDomainID(), false, ref culture) || culture == null) {
1325                 return CultureInfo.UserDefaultCulture;
1326             }
1327
1328             return culture;
1329 #else
1330             return m_CurrentCulture;
1331 #endif
1332
1333         }
1334
1335 #if! FEATURE_LEAK_CULTURE_INFO
1336         [System.Security.SecurityCritical]  // auto-generated
1337         [ResourceExposure(ResourceScope.None)]
1338         [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
1339         [SuppressUnmanagedCodeSecurity]
1340         private static extern void nativeInitCultureAccessors();
1341 #endif
1342
1343         /*=============================================================*/
1344
1345         /*======================================================================
1346         **  Current thread context is stored in a slot in the thread local store
1347         **  CurrentContext gets the Context from the slot.
1348         ======================================================================*/
1349 #if FEATURE_REMOTING
1350         public static Context CurrentContext
1351         {
1352             [System.Security.SecurityCritical]  // auto-generated_required
1353             get
1354             {
1355                 return CurrentThread.GetCurrentContextInternal();
1356             }
1357         }
1358
1359         [System.Security.SecurityCritical]  // auto-generated
1360         internal Context GetCurrentContextInternal()
1361         {
1362             if (m_Context == null)
1363             {
1364                 m_Context = Context.DefaultContext;
1365             }
1366             return m_Context;
1367         }
1368 #endif
1369
1370
1371 #if FEATURE_IMPERSONATION
1372         // Get and set thread's current principal (for role based security).
1373         public static IPrincipal CurrentPrincipal
1374         {
1375             [System.Security.SecuritySafeCritical]  // auto-generated
1376             get
1377             {
1378                 lock (CurrentThread)
1379                 {
1380                     IPrincipal principal = (IPrincipal)
1381                         CallContext.Principal;
1382                     if (principal == null)
1383                     {
1384                         principal = GetDomain().GetThreadPrincipal();
1385                         CallContext.Principal = principal;
1386                     }
1387                     return principal;
1388                 }
1389             }
1390
1391             [System.Security.SecuritySafeCritical]  // auto-generated
1392             [SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.ControlPrincipal)]
1393             set
1394             {
1395                 CallContext.Principal = value;
1396             }
1397         }
1398
1399         // Private routine called from unmanaged code to set an initial
1400         // principal for a newly created thread.
1401         [System.Security.SecurityCritical]  // auto-generated
1402         private void SetPrincipalInternal(IPrincipal principal)
1403         {
1404             GetMutableExecutionContext().LogicalCallContext.SecurityData.Principal = principal;
1405         }
1406 #endif // FEATURE_IMPERSONATION
1407
1408 #if FEATURE_REMOTING
1409
1410         // This returns the exposed context for a given context ID.
1411         [System.Security.SecurityCritical]  // auto-generated
1412         [ResourceExposure(ResourceScope.None)]
1413         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1414         internal static extern Context GetContextInternal(IntPtr id);
1415
1416         [System.Security.SecurityCritical]  // auto-generated
1417         [ResourceExposure(ResourceScope.None)]
1418         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1419         internal extern Object InternalCrossContextCallback(Context ctx, IntPtr ctxID, Int32 appDomainID, InternalCrossContextDelegate ftnToCall, Object[] args);
1420
1421         [System.Security.SecurityCritical]  // auto-generated
1422         internal Object InternalCrossContextCallback(Context ctx, InternalCrossContextDelegate ftnToCall, Object[] args)
1423         {
1424             return InternalCrossContextCallback(ctx, ctx.InternalContextID, 0, ftnToCall, args);
1425         }
1426
1427         // CompleteCrossContextCallback is called by the EE after transitioning to the requested context
1428         private static Object CompleteCrossContextCallback(InternalCrossContextDelegate ftnToCall, Object[] args)
1429         {
1430             return ftnToCall(args);
1431         }
1432 #endif // FEATURE_REMOTING
1433
1434         /*======================================================================
1435         ** Returns the current domain in which current thread is running.
1436         ======================================================================*/
1437
1438         [System.Security.SecurityCritical]  // auto-generated
1439         [ResourceExposure(ResourceScope.None)]
1440         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1441         private static extern AppDomain GetDomainInternal();
1442         [System.Security.SecurityCritical]  // auto-generated
1443         [ResourceExposure(ResourceScope.None)]
1444         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1445         private static extern AppDomain GetFastDomainInternal();
1446
1447         [System.Security.SecuritySafeCritical]  // auto-generated
1448         public static AppDomain GetDomain()
1449         {
1450             Contract.Ensures(Contract.Result<AppDomain>() != null);
1451
1452
1453             AppDomain ad;
1454             ad = GetFastDomainInternal();
1455             if (ad == null)
1456                 ad = GetDomainInternal();
1457
1458 #if FEATURE_REMOTING
1459             Contract.Assert(CurrentThread.m_Context == null || CurrentThread.m_Context.AppDomain == ad, "AppDomains on the managed & unmanaged threads should match");
1460 #endif
1461             return ad;
1462         }
1463
1464
1465         /*
1466          *  This returns a unique id to identify an appdomain.
1467          */
1468         public static int GetDomainID()
1469         {
1470             return GetDomain().GetId();
1471         }
1472
1473
1474         // Retrieves the name of the thread.
1475         //
1476         public  String Name {
1477             get {
1478                 return m_Name;
1479
1480             }
1481             [System.Security.SecuritySafeCritical]  // auto-generated
1482             [HostProtection(ExternalThreading=true)]
1483             set {
1484                 lock(this) {
1485                     if (m_Name != null)
1486                         throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_WriteOnce"));
1487                     m_Name = value;
1488
1489                     InformThreadNameChange(GetNativeHandle(), value, (value != null) ? value.Length : 0);
1490                 }
1491             }
1492         }
1493
1494         [System.Security.SecurityCritical]  // auto-generated
1495         [ResourceExposure(ResourceScope.None)]
1496         [DllImport(JitHelpers.QCall, CharSet = CharSet.Unicode)]
1497         [SuppressUnmanagedCodeSecurity]
1498         private static extern void InformThreadNameChange(ThreadHandle t, String name, int len);
1499
1500         internal Object AbortReason {
1501             [System.Security.SecurityCritical]  // auto-generated
1502             get {
1503                 object result = null;
1504                 try
1505                 {
1506                     result = GetAbortReason();
1507                 }
1508                 catch (Exception e)
1509                 {
1510                     throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_ExceptionStateCrossAppDomain"), e);
1511                 }
1512                 return result;
1513             }
1514             [System.Security.SecurityCritical]  // auto-generated
1515             set { SetAbortReason(value); }
1516         }
1517
1518         /*
1519          *  This marks the beginning of a critical code region.
1520          */
1521         [System.Security.SecuritySafeCritical]  // auto-generated
1522         [HostProtection(Synchronization=true, ExternalThreading=true)]
1523         [ResourceExposure(ResourceScope.None)]
1524         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1525         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
1526         public static extern void BeginCriticalRegion();
1527
1528         /*
1529          *  This marks the end of a critical code region.
1530          */
1531         [System.Security.SecuritySafeCritical]  // auto-generated
1532         [HostProtection(Synchronization=true, ExternalThreading=true)]
1533         [ResourceExposure(ResourceScope.None)]
1534         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1535         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
1536         public static extern void EndCriticalRegion();
1537
1538         /*
1539          *  This marks the beginning of a code region that requires thread affinity.
1540          */
1541         [System.Security.SecurityCritical]  // auto-generated_required
1542         [ResourceExposure(ResourceScope.None)]
1543         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1544         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
1545         public static extern void BeginThreadAffinity();
1546
1547         /*
1548          *  This marks the end of a code region that requires thread affinity.
1549          */
1550         [System.Security.SecurityCritical]  // auto-generated_required
1551         [ResourceExposure(ResourceScope.None)]
1552         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1553         [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
1554         public static extern void EndThreadAffinity();
1555
1556         /*=========================================================================
1557         ** Volatile Read & Write and MemoryBarrier methods.
1558         ** Provides the ability to read and write values ensuring that the values
1559         ** are read/written each time they are accessed.
1560         =========================================================================*/
1561
1562         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1563         public static byte VolatileRead(ref byte address)
1564         {
1565             byte ret = address;
1566             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1567             return ret;
1568         }
1569
1570         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1571         public static short VolatileRead(ref short address)
1572         {
1573             short ret = address;
1574             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1575             return ret;
1576         }
1577
1578         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1579         public static int VolatileRead(ref int address)
1580         {
1581             int ret = address;
1582             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1583             return ret;
1584         }
1585
1586         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1587         public static long VolatileRead(ref long address)
1588         {
1589             long ret = address;
1590             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1591             return ret;
1592         }
1593
1594         [CLSCompliant(false)]
1595         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1596         public static sbyte VolatileRead(ref sbyte address)
1597         {
1598             sbyte ret = address;
1599             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1600             return ret;
1601         }
1602
1603         [CLSCompliant(false)]
1604         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1605         public static ushort VolatileRead(ref ushort address)
1606         {
1607             ushort ret = address;
1608             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1609             return ret;
1610         }
1611
1612         [CLSCompliant(false)]
1613         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1614         public static uint VolatileRead(ref uint address)
1615         {
1616             uint ret = address;
1617             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1618             return ret;
1619         }
1620
1621         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1622         public static IntPtr VolatileRead(ref IntPtr address)
1623         {
1624             IntPtr ret = address;
1625             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1626             return ret;
1627         }
1628
1629         [CLSCompliant(false)]
1630         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1631         public static UIntPtr VolatileRead(ref UIntPtr address)
1632         {
1633             UIntPtr ret = address;
1634             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1635             return ret;
1636         }
1637
1638         [CLSCompliant(false)]
1639         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1640         public static ulong VolatileRead(ref ulong address)
1641         {
1642             ulong ret = address;
1643             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1644             return ret;
1645         }
1646
1647         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1648         public static float VolatileRead(ref float address)
1649         {
1650             float ret = address;
1651             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1652             return ret;
1653         }
1654
1655         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1656         public static double VolatileRead(ref double address)
1657         {
1658             double ret = address;
1659             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1660             return ret;
1661         }
1662
1663         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1664         public static Object VolatileRead(ref Object address)
1665         {
1666             Object ret = address;
1667             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1668             return ret;
1669         }
1670
1671         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1672         public static void VolatileWrite(ref byte address, byte value)
1673         {
1674             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1675             address = value;
1676         }
1677
1678         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1679         public static void VolatileWrite(ref short address, short value)
1680         {
1681             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1682             address = value;
1683         }
1684
1685         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1686         public static void VolatileWrite(ref int address, int value)
1687         {
1688             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1689             address = value;
1690         }
1691
1692         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1693         public static void VolatileWrite(ref long address, long value)
1694         {
1695             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1696             address = value;
1697         }
1698
1699         [CLSCompliant(false)]
1700         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1701         public static void VolatileWrite(ref sbyte address, sbyte value)
1702         {
1703             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1704             address = value;
1705         }
1706
1707         [CLSCompliant(false)]
1708         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1709         public static void VolatileWrite(ref ushort address, ushort value)
1710         {
1711             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1712             address = value;
1713         }
1714
1715         [CLSCompliant(false)]
1716         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1717         public static void VolatileWrite(ref uint address, uint value)
1718         {
1719             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1720             address = value;
1721         }
1722
1723         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1724         public static void VolatileWrite(ref IntPtr address, IntPtr value)
1725         {
1726             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1727             address = value;
1728         }
1729
1730         [CLSCompliant(false)]
1731         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1732         public static void VolatileWrite(ref UIntPtr address, UIntPtr value)
1733         {
1734             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1735             address = value;
1736         }
1737
1738         [CLSCompliant(false)]
1739         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1740         public static void VolatileWrite(ref ulong address, ulong value)
1741         {
1742             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1743             address = value;
1744         }
1745
1746         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1747         public static void VolatileWrite(ref float address, float value)
1748         {
1749             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1750             address = value;
1751         }
1752
1753         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1754         public static void VolatileWrite(ref double address, double value)
1755         {
1756             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1757             address = value;
1758         }
1759
1760         [MethodImplAttribute(MethodImplOptions.NoInlining)] // disable optimizations
1761         public static void VolatileWrite(ref Object address, Object value)
1762         {
1763             MemoryBarrier(); // Call MemoryBarrier to ensure the proper semantic in a portable way.
1764             address = value;
1765         }
1766 #endif
1767         [System.Security.SecuritySafeCritical]  // auto-generated
1768         [ResourceExposure(ResourceScope.None)]
1769         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1770         public static extern void MemoryBarrier();
1771
1772         private static LocalDataStoreMgr LocalDataStoreManager
1773         {
1774             get
1775             {
1776                 if (s_LocalDataStoreMgr == null)
1777                 {
1778                     Interlocked.CompareExchange(ref s_LocalDataStoreMgr, new LocalDataStoreMgr(), null);
1779                 }
1780
1781                 return s_LocalDataStoreMgr;
1782             }
1783         }
1784
1785 #if !FEATURE_CORECLR && !MOBILE
1786         void _Thread.GetTypeInfoCount(out uint pcTInfo)
1787         {
1788             throw new NotImplementedException();
1789         }
1790
1791         void _Thread.GetTypeInfo(uint iTInfo, uint lcid, IntPtr ppTInfo)
1792         {
1793             throw new NotImplementedException();
1794         }
1795
1796         void _Thread.GetIDsOfNames([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
1797         {
1798             throw new NotImplementedException();
1799         }
1800
1801         void _Thread.Invoke(uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
1802         {
1803             throw new NotImplementedException();
1804         }
1805 #endif
1806
1807 #if !MONO
1808         // Helper function to set the AbortReason for a thread abort.
1809         //  Checks that they're not alredy set, and then atomically updates
1810         //  the reason info (object + ADID).
1811         [System.Security.SecurityCritical]  // auto-generated
1812         [ResourceExposure(ResourceScope.None)]
1813         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1814         internal extern void SetAbortReason(Object o);
1815
1816         // Helper function to retrieve the AbortReason from a thread
1817         //  abort.  Will perform cross-AppDomain marshalling if the object
1818         //  lives in a different AppDomain from the requester.
1819         [System.Security.SecurityCritical]  // auto-generated
1820         [ResourceExposure(ResourceScope.None)]
1821         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1822         internal extern Object GetAbortReason();
1823
1824         // Helper function to clear the AbortReason.  Takes care of
1825         //  AppDomain related cleanup if required.
1826         [System.Security.SecurityCritical]  // auto-generated
1827         [ResourceExposure(ResourceScope.None)]
1828         [MethodImplAttribute(MethodImplOptions.InternalCall)]
1829         internal extern void ClearAbortReason();
1830 #endif
1831
1832     } // End of class Thread
1833
1834     // declaring a local var of this enum type and passing it by ref into a function that needs to do a
1835     // stack crawl will both prevent inlining of the calle and pass an ESP point to stack crawl to
1836     // Declaring these in EH clauses is illegal; they must declared in the main method body
1837     [Serializable]
1838     internal enum StackCrawlMark
1839     {
1840         LookForMe = 0,
1841         LookForMyCaller = 1,
1842         LookForMyCallersCaller = 2,
1843         LookForThread = 3
1844     }
1845
1846 }