// System.Threading.WaitHandle.cs
//
// Author:
-// Dick Porter (dick@ximian.com)
+// Dick Porter (dick@ximian.com)
+// Gonzalo Paniagua Javier (gonzalo@ximian.com
//
-// (C) Ximian, Inc. http://www.ximian.com
+// (C) 2002,2003 Ximian, Inc. (http://www.ximian.com)
+// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
+using System;
+using System.Reflection;
using System.Runtime.CompilerServices;
+using System.Runtime.Remoting.Contexts;
+using System.Security.Permissions;
+using System.Runtime.InteropServices;
+using Microsoft.Win32.SafeHandles;
+using System.Runtime.ConstrainedExecution;
namespace System.Threading
{
+ [ComVisible (true)]
public abstract class WaitHandle : MarshalByRefObject, IDisposable
{
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern bool WaitAll_internal(WaitHandle[] handles, int ms, bool exitContext);
- public static bool WaitAll(WaitHandle[] waitHandles) {
- return(WaitAll_internal(waitHandles, 0, false));
+ static void CheckArray (WaitHandle [] handles, bool waitAll)
+ {
+ if (handles == null)
+ throw new ArgumentNullException ("waitHandles");
+
+ int length = handles.Length;
+ if (length > 64)
+ throw new NotSupportedException ("Too many handles");
+
+ if (handles.Length == 0) {
+ // MS throws different exceptions from the different methods.
+ if (waitAll)
+ throw new ArgumentNullException ("waitHandles");
+ else
+ throw new ArgumentException ();
+ }
+
+#if false
+ //
+ // Although we should thrown an exception if this is an STA thread,
+ // Mono does not know anything about STA threads, and just makes
+ // things like Paint.NET not even possible to work.
+ //
+ // See bug #78455 for the bug this is supposed to fix.
+ //
+ if (waitAll && length > 1 && IsSTAThread)
+ throw new NotSupportedException ("WaitAll for multiple handles is not allowed on an STA thread.");
+#endif
+ foreach (WaitHandle w in handles) {
+ if (w == null)
+ throw new ArgumentNullException ("waitHandles", "null handle");
+
+ if (w.safe_wait_handle == null)
+ throw new ArgumentException ("null element found", "waitHandle");
+
+ }
}
+#if false
+ // usage of property is commented - see above
+ static bool IsSTAThread {
+ get {
+ bool isSTA = Thread.CurrentThread.ApartmentState ==
+ ApartmentState.STA;
- public static bool WaitAll(WaitHandle[] waitHandles,
- int millisecondsTimeout,
- bool exitContext) {
- return(WaitAll_internal(waitHandles, millisecondsTimeout, false));
+ // FIXME: remove this check after Thread.ApartmentState
+ // has been properly implemented.
+ if (!isSTA) {
+ Assembly asm = Assembly.GetEntryAssembly ();
+ if (asm != null)
+ isSTA = asm.EntryPoint.GetCustomAttributes (typeof (STAThreadAttribute), false).Length > 0;
+ }
+
+ return isSTA;
+ }
+ }
+#endif
+ public static bool WaitAll(WaitHandle[] waitHandles)
+ {
+ CheckArray (waitHandles, true);
+ return(WaitAll_internal(waitHandles, Timeout.Infinite, false));
+ }
+
+ public static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
+ {
+ CheckArray (waitHandles, true);
+ // check negative - except for -1 (which is Timeout.Infinite)
+ if (millisecondsTimeout < Timeout.Infinite)
+ throw new ArgumentOutOfRangeException ("millisecondsTimeout");
+
+ try {
+ if (exitContext) SynchronizationAttribute.ExitContext ();
+ return(WaitAll_internal(waitHandles, millisecondsTimeout, false));
+ }
+ finally {
+ if (exitContext) SynchronizationAttribute.EnterContext ();
+ }
}
public static bool WaitAll(WaitHandle[] waitHandles,
TimeSpan timeout,
- bool exitContext) {
- return(WaitAll_internal(waitHandles, timeout.Milliseconds, exitContext));
+ bool exitContext)
+ {
+ CheckArray (waitHandles, true);
+ long ms = (long) timeout.TotalMilliseconds;
+
+ if (ms < -1 || ms > Int32.MaxValue)
+ throw new ArgumentOutOfRangeException ("timeout");
+
+ try {
+ if (exitContext) SynchronizationAttribute.ExitContext ();
+ return (WaitAll_internal (waitHandles, (int) ms, exitContext));
+ }
+ finally {
+ if (exitContext) SynchronizationAttribute.EnterContext ();
+ }
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern int WaitAny_internal(WaitHandle[] handles, int ms, bool exitContext);
- public static int WaitAny(WaitHandle[] waitHandles) {
- return(WaitAny_internal(waitHandles, 0, false));
+ // LAMESPEC: Doesn't specify how to signal failures
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
+ public static int WaitAny(WaitHandle[] waitHandles)
+ {
+ CheckArray (waitHandles, false);
+ return(WaitAny_internal(waitHandles, Timeout.Infinite, false));
}
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
public static int WaitAny(WaitHandle[] waitHandles,
int millisecondsTimeout,
- bool exitContext) {
- return(WaitAny_internal(waitHandles, millisecondsTimeout, exitContext));
+ bool exitContext)
+ {
+ CheckArray (waitHandles, false);
+ // check negative - except for -1 (which is Timeout.Infinite)
+ if (millisecondsTimeout < Timeout.Infinite)
+ throw new ArgumentOutOfRangeException ("millisecondsTimeout");
+
+ try {
+ if (exitContext) SynchronizationAttribute.ExitContext ();
+ return(WaitAny_internal(waitHandles, millisecondsTimeout, exitContext));
+ }
+ finally {
+ if (exitContext) SynchronizationAttribute.EnterContext ();
+ }
}
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
+ public static int WaitAny(WaitHandle[] waitHandles, TimeSpan timeout)
+ {
+ return WaitAny (waitHandles, timeout, false);
+ }
+
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
+ public static int WaitAny(WaitHandle[] waitHandles, int millisecondsTimeout)
+ {
+ return WaitAny (waitHandles, millisecondsTimeout, false);
+ }
+
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
public static int WaitAny(WaitHandle[] waitHandles,
- TimeSpan timeout, bool exitContext) {
- if(timeout.Milliseconds < 0 ||
- timeout.Milliseconds > Int32.MaxValue) {
- throw new ArgumentOutOfRangeException("Timeout out of range");
+ TimeSpan timeout, bool exitContext)
+ {
+ CheckArray (waitHandles, false);
+ long ms = (long) timeout.TotalMilliseconds;
+
+ if (ms < -1 || ms > Int32.MaxValue)
+ throw new ArgumentOutOfRangeException ("timeout");
+
+ try {
+ if (exitContext) SynchronizationAttribute.ExitContext ();
+ return (WaitAny_internal(waitHandles, (int) ms, exitContext));
+ }
+ finally {
+ if (exitContext) SynchronizationAttribute.EnterContext ();
}
- return(WaitAny_internal(waitHandles, timeout.Milliseconds, exitContext));
}
- [MonoTODO]
- public WaitHandle() {
+ protected WaitHandle()
+ {
// FIXME
}
+ public virtual void Close() {
+ Dispose(true);
+ GC.SuppressFinalize (this);
+ }
+
+#if NET_4_0
+ public void Dispose ()
+#else
+ void IDisposable.Dispose ()
+#endif
+ {
+ Close ();
+ }
+
public const int WaitTimeout = 258;
- private IntPtr handle = IntPtr.Zero;
-
+ //
+ // In 2.0 we use SafeWaitHandles instead of IntPtrs
+ //
+ SafeWaitHandle safe_wait_handle;
+
+ [Obsolete ("In the profiles > 2.x, use SafeHandle instead of Handle")]
public virtual IntPtr Handle {
get {
- return(handle);
+ return safe_wait_handle.DangerousGetHandle ();
}
-
+
+ [SecurityPermission (SecurityAction.LinkDemand, UnmanagedCode = true)]
+ [SecurityPermission (SecurityAction.InheritanceDemand, UnmanagedCode = true)]
set {
- handle=value;
+ if (value == InvalidHandle)
+ safe_wait_handle = new SafeWaitHandle (InvalidHandle, false);
+ else
+ safe_wait_handle = new SafeWaitHandle (value, true);
}
}
+
+ [MethodImplAttribute(MethodImplOptions.InternalCall)]
+ private extern bool WaitOne_internal(IntPtr handle, int ms, bool exitContext);
- public virtual void Close() {
- Dispose(false);
+ protected virtual void Dispose (bool explicitDisposing)
+ {
+ if (!disposed){
+ disposed = true;
+
+ //
+ // This is only the case if the handle was never properly initialized
+ // most likely a bug in the derived class
+ //
+ if (safe_wait_handle == null)
+ return;
+
+ lock (this){
+ if (safe_wait_handle != null)
+ safe_wait_handle.Dispose ();
+ }
+ }
}
- [MethodImplAttribute(MethodImplOptions.InternalCall)]
- protected virtual extern bool WaitOne_internal(IntPtr handle, int ms, bool exitContext);
+ public SafeWaitHandle SafeWaitHandle {
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.MayFail)]
+ get {
+ return safe_wait_handle;
+ }
- public virtual bool WaitOne() {
- return(WaitOne_internal(handle, 0, false));
+ [ReliabilityContract (Consistency.WillNotCorruptState, Cer.Success)]
+ set {
+ if (value == null)
+ safe_wait_handle = new SafeWaitHandle (InvalidHandle, false);
+ else
+ safe_wait_handle = value;
+ }
}
- public virtual bool WaitOne(int millisecondsTimeout, bool exitContext) {
- return(WaitOne_internal(handle, millisecondsTimeout, exitContext));
+ public static bool SignalAndWait (WaitHandle toSignal,
+ WaitHandle toWaitOn)
+ {
+ return SignalAndWait (toSignal, toWaitOn, -1, false);
}
+
+ public static bool SignalAndWait (WaitHandle toSignal,
+ WaitHandle toWaitOn,
+ int millisecondsTimeout,
+ bool exitContext)
+ {
+ if (toSignal == null)
+ throw new ArgumentNullException ("toSignal");
+ if (toWaitOn == null)
+ throw new ArgumentNullException ("toWaitOn");
+
+ if (millisecondsTimeout < -1)
+ throw new ArgumentOutOfRangeException ("millisecondsTimeout");
- public virtual bool WaitOne(TimeSpan timeout, bool exitContext) {
- return(WaitOne_internal(handle, timeout.Milliseconds, exitContext));
+ return SignalAndWait_Internal (toSignal.Handle, toWaitOn.Handle, millisecondsTimeout, exitContext);
}
+
+ public static bool SignalAndWait (WaitHandle toSignal,
+ WaitHandle toWaitOn,
+ TimeSpan timeout,
+ bool exitContext)
+ {
+ double ms = timeout.TotalMilliseconds;
+ if (ms > Int32.MaxValue)
+ throw new ArgumentOutOfRangeException ("timeout");
- protected static readonly IntPtr InvalidHandle;
+ return SignalAndWait (toSignal, toWaitOn, Convert.ToInt32 (ms), false);
+ }
- private bool disposed = false;
+ [MethodImplAttribute(MethodImplOptions.InternalCall)]
+ static extern bool SignalAndWait_Internal (IntPtr toSignal, IntPtr toWaitOn, int ms, bool exitContext);
- public void Dispose() {
- Dispose(true);
- // Take yourself off the Finalization queue
- GC.SuppressFinalize(this);
+ public virtual bool WaitOne()
+ {
+ CheckDisposed ();
+ bool release = false;
+ try {
+ safe_wait_handle.DangerousAddRef (ref release);
+ return (WaitOne_internal(safe_wait_handle.DangerousGetHandle (), Timeout.Infinite, false));
+ } finally {
+ if (release)
+ safe_wait_handle.DangerousRelease ();
+ }
}
-
- protected virtual void Dispose(bool explicitDisposing) {
- // Check to see if Dispose has already been called.
- if(!this.disposed) {
- // If this is a call to Dispose,
- // dispose all managed resources.
- if(explicitDisposing) {
- // Free up stuff here
- //Components.Dispose();
- }
- // Release unmanaged resources
- // Note that this is not thread safe.
- // Another thread could start
- // disposing the object after the
- // managed resources are disposed, but
- // before the disposed flag is set to
- // true.
- this.disposed=true;
- //Release(handle);
- //handle=IntPtr.Zero;
+ public virtual bool WaitOne(int millisecondsTimeout, bool exitContext)
+ {
+ CheckDisposed ();
+ // check negative - except for -1 (which is Timeout.Infinite)
+ if (millisecondsTimeout < Timeout.Infinite)
+ throw new ArgumentOutOfRangeException ("millisecondsTimeout");
+
+ bool release = false;
+ try {
+ if (exitContext)
+ SynchronizationAttribute.ExitContext ();
+ safe_wait_handle.DangerousAddRef (ref release);
+ return (WaitOne_internal(safe_wait_handle.DangerousGetHandle (), millisecondsTimeout, exitContext));
+ } finally {
+ if (exitContext)
+ SynchronizationAttribute.EnterContext ();
+ if (release)
+ safe_wait_handle.DangerousRelease ();
}
}
+ public virtual bool WaitOne (int millisecondsTimeout)
+ {
+ return WaitOne (millisecondsTimeout, false);
+ }
+
+ public virtual bool WaitOne (TimeSpan timeout)
+ {
+ return WaitOne (timeout, false);
+ }
+
+ public virtual bool WaitOne(TimeSpan timeout, bool exitContext)
+ {
+ CheckDisposed ();
+ long ms = (long) timeout.TotalMilliseconds;
+ if (ms < -1 || ms > Int32.MaxValue)
+ throw new ArgumentOutOfRangeException ("timeout");
+
+ bool release = false;
+ try {
+ if (exitContext)
+ SynchronizationAttribute.ExitContext ();
+ safe_wait_handle.DangerousAddRef (ref release);
+ return (WaitOne_internal(safe_wait_handle.DangerousGetHandle (), (int) ms, exitContext));
+ }
+ finally {
+ if (exitContext)
+ SynchronizationAttribute.EnterContext ();
+ if (release)
+ safe_wait_handle.DangerousRelease ();
+ }
+ }
+
+ internal void CheckDisposed ()
+ {
+ if (disposed || safe_wait_handle == null)
+ throw new ObjectDisposedException (GetType ().FullName);
+ }
+
+ public static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout)
+ {
+ return WaitAll (waitHandles, millisecondsTimeout, false);
+ }
+
+ public static bool WaitAll(WaitHandle[] waitHandles, TimeSpan timeout)
+ {
+ return WaitAll (waitHandles, timeout, false);
+ }
+
+ protected static readonly IntPtr InvalidHandle = (IntPtr) (-1);
+ bool disposed = false;
+
~WaitHandle() {
Dispose(false);
}
projects / mono.git / blobdiff