mono/io-layer/threads.c

   1 /*
   2  * threads.c:  Thread handles
   3  *
   4  * Author:
   5  *      Dick Porter (dick@ximian.com)
   6  *
   7  * (C) 2002 Ximian, Inc.
   8  */
   9
  10 #include <config.h>
  11 #if HAVE_BOEHM_GC
  12 #include <mono/os/gc_wrapper.h>
  13 #include "mono/utils/mono-hash.h"
  14 #endif
  15 #include <glib.h>
  16 #include <string.h>
  17 #include <pthread.h>
  18 #include <sched.h>
  19 #include <sys/time.h>
  20 #include <errno.h>
  21
  22 #include <mono/io-layer/wapi.h>
  23 #include <mono/io-layer/wapi-private.h>
  24 #include <mono/io-layer/timed-thread.h>
  25 #include <mono/io-layer/handles-private.h>
  26 #include <mono/io-layer/misc-private.h>
  27 #include <mono/io-layer/mono-mutex.h>
  28 #include <mono/io-layer/thread-private.h>
  29 #include <mono/io-layer/mono-spinlock.h>
  30
  31 #undef DEBUG
  32 #undef TLS_DEBUG
  33 #undef TLS_PTHREAD_MUTEX
  34
  35
  36 /* Hash threads with tids. I thought of using TLS for this, but that
  37  * would have to set the data in the new thread, which is more hassle
  38  */
  39 static mono_once_t thread_hash_once = MONO_ONCE_INIT;
  40 static mono_mutex_t thread_hash_mutex = MONO_MUTEX_INITIALIZER;
  41 static GHashTable *thread_hash=NULL;
  42
  43 #if HAVE_BOEHM_GC
  44 static MonoGHashTable *tls_gc_hash = NULL;
  45 #endif
  46
  47 static void thread_close_private (gpointer handle);
  48 static void thread_own (gpointer handle);
  49
  50 struct _WapiHandleOps _wapi_thread_ops = {
  51         NULL,                           /* close_shared */
  52         thread_close_private,           /* close_private */
  53         NULL,                           /* signal */
  54         thread_own,                     /* own */
  55         NULL,                           /* is_owned */
  56 };
  57
  58 static mono_once_t thread_ops_once=MONO_ONCE_INIT;
  59
  60 static void thread_ops_init (void)
  61 {
  62         _wapi_handle_register_capabilities (WAPI_HANDLE_THREAD,
  63                                             WAPI_HANDLE_CAP_WAIT);
  64 }
  65
  66 static void thread_close_private (gpointer handle)
  67 {
  68         struct _WapiHandlePrivate_thread *thread_handle;
  69         gboolean ok;
  70
  71         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD, NULL,
  72                                 (gpointer *)&thread_handle);
  73         if(ok==FALSE) {
  74                 g_warning (G_GNUC_PRETTY_FUNCTION
  75                            ": error looking up thread handle %p", handle);
  76                 return;
  77         }
  78
  79 #ifdef DEBUG
  80         g_message(G_GNUC_PRETTY_FUNCTION
  81                   ": closing thread handle %p with thread %p id %ld",
  82                   handle, thread_handle->thread,
  83                   thread_handle->thread->id);
  84 #endif
  85
  86         if(thread_handle->thread!=NULL) {
  87                 _wapi_timed_thread_destroy (thread_handle->thread);
  88         }
  89 }
  90
  91 static void thread_own (gpointer handle)
  92 {
  93         struct _WapiHandle_thread *thread_handle;
  94         struct _WapiHandlePrivate_thread *thread_private_handle;
  95         gboolean ok;
  96
  97         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
  98                                 (gpointer *)&thread_handle,
  99                                 (gpointer *)&thread_private_handle);
 100         if(ok==FALSE) {
 101                 g_warning (G_GNUC_PRETTY_FUNCTION
 102                            ": error looking up thread handle %p", handle);
 103                 return;
 104         }
 105
 106         if(thread_private_handle->joined==FALSE) {
 107                 _wapi_timed_thread_join (thread_private_handle->thread, NULL,
 108                                          NULL);
 109                 thread_private_handle->joined=TRUE;
 110         }
 111 }
 112
 113 static void thread_exit(guint32 exitstatus, gpointer handle)
 114 {
 115         struct _WapiHandle_thread *thread_handle;
 116         struct _WapiHandlePrivate_thread *thread_private_handle;
 117         gboolean ok;
 118
 119         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
 120                                 (gpointer *)&thread_handle,
 121                                 (gpointer *)&thread_private_handle);
 122         if(ok==FALSE) {
 123                 g_warning (G_GNUC_PRETTY_FUNCTION
 124                            ": error looking up thread handle %p", handle);
 125                 return;
 126         }
 127
 128         _wapi_handle_lock_handle (handle);
 129
 130 #ifdef DEBUG
 131         g_message (G_GNUC_PRETTY_FUNCTION
 132                    ": Recording thread handle %p exit status", handle);
 133 #endif
 134
 135         thread_handle->exitstatus=exitstatus;
 136         thread_handle->state=THREAD_STATE_EXITED;
 137         _wapi_handle_set_signal_state (handle, TRUE, TRUE);
 138
 139         _wapi_handle_unlock_handle (handle);
 140
 141 #ifdef DEBUG
 142         g_message(G_GNUC_PRETTY_FUNCTION
 143                   ": Recording thread handle %p id %ld status as %d",
 144                   handle, thread_private_handle->thread->id, exitstatus);
 145 #endif
 146
 147         /* Remove this thread from the hash */
 148         mono_mutex_lock(&thread_hash_mutex);
 149         g_hash_table_remove(thread_hash, &thread_private_handle->thread->id);
 150         mono_mutex_unlock(&thread_hash_mutex);
 151
 152         /* The thread is no longer active, so unref it */
 153         _wapi_handle_unref (handle);
 154 }
 155
 156 static void thread_hash_init(void)
 157 {
 158         thread_hash=g_hash_table_new(g_int_hash, g_int_equal);
 159 }
 160
 161 /**
 162  * CreateThread:
 163  * @security: Ignored for now.
 164  * @stacksize: the size in bytes of the new thread's stack. Use 0 to
 165  * default to the normal stack size. (Ignored for now).
 166  * @start: The function that the new thread should start with
 167  * @param: The parameter to give to @start.
 168  * @create: If 0, the new thread is ready to run immediately.  If
 169  * %CREATE_SUSPENDED, the new thread will be in the suspended state,
 170  * requiring a ResumeThread() call to continue running.
 171  * @tid: If non-NULL, the ID of the new thread is stored here.
 172  *
 173  * Creates a new threading handle.
 174  *
 175  * Return value: a new handle, or NULL
 176  */
 177 gpointer CreateThread(WapiSecurityAttributes *security G_GNUC_UNUSED, guint32 stacksize G_GNUC_UNUSED,
 178                       WapiThreadStart start, gpointer param, guint32 create,
 179                       guint32 *tid)
 180 {
 181         struct _WapiHandle_thread *thread_handle;
 182         struct _WapiHandlePrivate_thread *thread_private_handle;
 183         gpointer handle;
 184         gboolean ok;
 185         int ret;
 186
 187         mono_once(&thread_hash_once, thread_hash_init);
 188         mono_once (&thread_ops_once, thread_ops_init);
 189
 190         if(start==NULL) {
 191                 return(NULL);
 192         }
 193
 194         handle=_wapi_handle_new (WAPI_HANDLE_THREAD);
 195         if(handle==_WAPI_HANDLE_INVALID) {
 196                 g_warning (G_GNUC_PRETTY_FUNCTION
 197                            ": error creating thread handle");
 198                 return(NULL);
 199         }
 200
 201         _wapi_handle_lock_handle (handle);
 202
 203         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
 204                                 (gpointer *)&thread_handle,
 205                                 (gpointer *)&thread_private_handle);
 206         if(ok==FALSE) {
 207                 g_warning (G_GNUC_PRETTY_FUNCTION
 208                            ": error looking up thread handle %p", handle);
 209                 _wapi_handle_unlock_handle (handle);
 210                 return(NULL);
 211         }
 212
 213         /* Hold a reference while the thread is active, because we use
 214          * the handle to store thread exit information
 215          */
 216         _wapi_handle_ref (handle);
 217
 218         thread_handle->state=THREAD_STATE_START;
 219
 220         /* Lock around the thread create, so that the new thread cant
 221          * race us to look up the thread handle in GetCurrentThread()
 222          */
 223         mono_mutex_lock(&thread_hash_mutex);
 224
 225         ret=_wapi_timed_thread_create(&thread_private_handle->thread, NULL,
 226                                       create, start, thread_exit, param,
 227                                       handle);
 228         if(ret!=0) {
 229 #ifdef DEBUG
 230                 g_message(G_GNUC_PRETTY_FUNCTION ": Thread create error: %s",
 231                           strerror(ret));
 232 #endif
 233                 mono_mutex_unlock(&thread_hash_mutex);
 234                 _wapi_handle_unlock_handle (handle);
 235                 _wapi_handle_unref (handle);
 236
 237                 /* And again, because of the reference we took above */
 238                 _wapi_handle_unref (handle);
 239                 return(NULL);
 240         }
 241
 242         g_hash_table_insert(thread_hash, &thread_private_handle->thread->id,
 243                             handle);
 244         mono_mutex_unlock(&thread_hash_mutex);
 245
 246 #ifdef DEBUG
 247         g_message(G_GNUC_PRETTY_FUNCTION
 248                   ": Started thread handle %p thread %p ID %ld", handle,
 249                   thread_private_handle->thread,
 250                   thread_private_handle->thread->id);
 251 #endif
 252
 253         if(tid!=NULL) {
 254 #ifdef PTHREAD_POINTER_ID
 255                 *tid=GPOINTER_TO_UINT(thread_private_handle->thread->id);
 256 #else
 257                 *tid=thread_private_handle->thread->id;
 258 #endif
 259         }
 260
 261         _wapi_handle_unlock_handle (handle);
 262
 263         return(handle);
 264 }
 265
 266 gpointer OpenThread (guint32 access G_GNUC_UNUSED, gboolean inherit G_GNUC_UNUSED, guint32 tid)
 267 {
 268         gpointer ret=NULL;
 269
 270 #ifdef DEBUG
 271         g_message (G_GNUC_PRETTY_FUNCTION ": looking up thread %d", tid);
 272 #endif
 273
 274         mono_mutex_lock(&thread_hash_mutex);
 275
 276         ret=g_hash_table_lookup(thread_hash, &tid);
 277         mono_mutex_unlock(&thread_hash_mutex);
 278
 279         if(ret!=NULL) {
 280                 _wapi_handle_ref (ret);
 281         }
 282
 283 #ifdef DEBUG
 284         g_message (G_GNUC_PRETTY_FUNCTION ": returning thread handle %p", ret);
 285 #endif
 286
 287         return(ret);
 288 }
 289
 290 /**
 291  * ExitThread:
 292  * @exitcode: Sets the thread's exit code, which can be read from
 293  * another thread with GetExitCodeThread().
 294  *
 295  * Terminates the calling thread.  A thread can also exit by returning
 296  * from its start function. When the last thread in a process
 297  * terminates, the process itself terminates.
 298  */
 299 void ExitThread(guint32 exitcode)
 300 {
 301         /* No thread created yet.  */
 302         if (thread_hash == NULL)
 303                 exit(exitcode);
 304
 305         _wapi_timed_thread_exit(exitcode);
 306 }
 307
 308 /**
 309  * GetExitCodeThread:
 310  * @handle: The thread handle to query
 311  * @exitcode: The thread @handle exit code is stored here
 312  *
 313  * Finds the exit code of @handle, and stores it in @exitcode.  If the
 314  * thread @handle is still running, the value stored is %STILL_ACTIVE.
 315  *
 316  * Return value: %TRUE, or %FALSE on error.
 317  */
 318 gboolean GetExitCodeThread(gpointer handle, guint32 *exitcode)
 319 {
 320         struct _WapiHandle_thread *thread_handle;
 321         struct _WapiHandlePrivate_thread *thread_private_handle;
 322         gboolean ok;
 323
 324         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
 325                                 (gpointer *)&thread_handle,
 326                                 (gpointer *)&thread_private_handle);
 327         if(ok==FALSE) {
 328                 g_warning (G_GNUC_PRETTY_FUNCTION
 329                            ": error looking up thread handle %p", handle);
 330                 return(FALSE);
 331         }
 332
 333 #ifdef DEBUG
 334         g_message(G_GNUC_PRETTY_FUNCTION
 335                   ": Finding exit status for thread handle %p id %ld", handle,
 336                   thread_private_handle->thread->id);
 337 #endif
 338
 339         if(exitcode==NULL) {
 340 #ifdef DEBUG
 341                 g_message(G_GNUC_PRETTY_FUNCTION
 342                           ": Nowhere to store exit code");
 343 #endif
 344                 return(FALSE);
 345         }
 346
 347         if(thread_handle->state!=THREAD_STATE_EXITED) {
 348 #ifdef DEBUG
 349                 g_message(G_GNUC_PRETTY_FUNCTION
 350                           ": Thread still active (state %d, exited is %d)",
 351                           thread_handle->state, THREAD_STATE_EXITED);
 352 #endif
 353                 *exitcode=STILL_ACTIVE;
 354                 return(TRUE);
 355         }
 356
 357         *exitcode=thread_handle->exitstatus;
 358
 359         return(TRUE);
 360 }
 361
 362 /**
 363  * GetCurrentThreadId:
 364  *
 365  * Looks up the thread ID of the current thread.  This ID can be
 366  * passed to OpenThread() to create a new handle on this thread.
 367  *
 368  * Return value: the thread ID.
 369  */
 370 guint32 GetCurrentThreadId(void)
 371 {
 372         pthread_t tid=pthread_self();
 373
 374 #ifdef PTHREAD_POINTER_ID
 375         return(GPOINTER_TO_UINT(tid));
 376 #else
 377         return(tid);
 378 #endif
 379 }
 380
 381 /**
 382  * GetCurrentThread:
 383  *
 384  * Looks up the handle associated with the current thread.  Under
 385  * Windows this is a pseudohandle, and must be duplicated with
 386  * DuplicateHandle() for some operations.
 387  *
 388  * Return value: The current thread handle, or %NULL on failure.
 389  * (Unknown whether Windows has a possible failure here.  It may be
 390  * necessary to implement the pseudohandle-constant behaviour).
 391  */
 392 gpointer GetCurrentThread(void)
 393 {
 394         gpointer ret=NULL;
 395         guint32 tid;
 396
 397         tid=GetCurrentThreadId();
 398
 399         mono_mutex_lock(&thread_hash_mutex);
 400
 401         ret=g_hash_table_lookup(thread_hash, &tid);
 402
 403         mono_mutex_unlock(&thread_hash_mutex);
 404
 405         return(ret);
 406 }
 407
 408 /**
 409  * ResumeThread:
 410  * @handle: the thread handle to resume
 411  *
 412  * Decrements the suspend count of thread @handle. A thread can only
 413  * run if its suspend count is zero.
 414  *
 415  * Return value: the previous suspend count, or 0xFFFFFFFF on error.
 416  */
 417 guint32 ResumeThread(gpointer handle)
 418 {
 419         struct _WapiHandle_thread *thread_handle;
 420         struct _WapiHandlePrivate_thread *thread_private_handle;
 421         gboolean ok;
 422
 423         ok=_wapi_lookup_handle (handle, WAPI_HANDLE_THREAD,
 424                                 (gpointer *)&thread_handle,
 425                                 (gpointer *)&thread_private_handle);
 426         if(ok==FALSE) {
 427                 g_warning (G_GNUC_PRETTY_FUNCTION
 428                            ": error looking up thread handle %p", handle);
 429                 return(0xFFFFFFFF);
 430         }
 431
 432         /* This is still a kludge that only copes with starting a
 433          * thread that was suspended on create, so don't bother with
 434          * the suspend count crap yet
 435          */
 436         _wapi_timed_thread_resume (thread_private_handle->thread);
 437
 438         return(0xFFFFFFFF);
 439 }
 440
 441 /**
 442  * SuspendThread:
 443  * @handle: the thread handle to suspend
 444  *
 445  * Increments the suspend count of thread @handle. A thread can only
 446  * run if its suspend count is zero.
 447  *
 448  * Return value: the previous suspend count, or 0xFFFFFFFF on error.
 449  */
 450 guint32 SuspendThread(gpointer handle G_GNUC_UNUSED)
 451 {
 452         return(0xFFFFFFFF);
 453 }
 454
 455 /*
 456  * We assume here that TLS_MINIMUM_AVAILABLE is less than
 457  * PTHREAD_KEYS_MAX, allowing enough overhead for a few TLS keys for
 458  * library usage.
 459  *
 460  * Currently TLS_MINIMUM_AVAILABLE is 64 and _POSIX_THREAD_KEYS_MAX
 461  * (the minimum value for PTHREAD_KEYS_MAX) is 128, so we should be
 462  * fine.
 463  */
 464
 465 static pthread_key_t TLS_keys[TLS_MINIMUM_AVAILABLE];
 466 static gboolean TLS_used[TLS_MINIMUM_AVAILABLE]={FALSE};
 467 #ifdef TLS_PTHREAD_MUTEX
 468 static mono_mutex_t TLS_mutex=MONO_MUTEX_INITIALIZER;
 469 #else
 470 static guint32 TLS_spinlock=0;
 471 #endif
 472
 473 /**
 474  * TlsAlloc:
 475  *
 476  * Allocates a Thread Local Storage (TLS) index.  Any thread in the
 477  * same process can use this index to store and retrieve values that
 478  * are local to that thread.
 479  *
 480  * Return value: The index value, or %TLS_OUT_OF_INDEXES if no index
 481  * is available.
 482  */
 483 guint32 TlsAlloc(void)
 484 {
 485         guint32 i;
 486
 487 #ifdef TLS_PTHREAD_MUTEX
 488         mono_mutex_lock(&TLS_mutex);
 489 #else
 490         MONO_SPIN_LOCK (TLS_spinlock);
 491 #endif
 492
 493         for(i=0; i<TLS_MINIMUM_AVAILABLE; i++) {
 494                 if(TLS_used[i]==FALSE) {
 495                         TLS_used[i]=TRUE;
 496                         pthread_key_create(&TLS_keys[i], NULL);
 497
 498 #ifdef TLS_PTHREAD_MUTEX
 499                         mono_mutex_unlock(&TLS_mutex);
 500 #else
 501                         MONO_SPIN_UNLOCK (TLS_spinlock);
 502 #endif
 503
 504 #ifdef TLS_DEBUG
 505                         g_message (G_GNUC_PRETTY_FUNCTION ": returning key %d",
 506                                    i);
 507 #endif
 508
 509                         return(i);
 510                 }
 511         }
 512
 513 #ifdef TLS_PTHREAD_MUTEX
 514         mono_mutex_unlock(&TLS_mutex);
 515 #else
 516         MONO_SPIN_UNLOCK (TLS_spinlock);
 517 #endif
 518
 519 #ifdef TLS_DEBUG
 520         g_message (G_GNUC_PRETTY_FUNCTION ": out of indices");
 521 #endif
 522
 523
 524         return(TLS_OUT_OF_INDEXES);
 525 }
 526
 527 #define MAKE_GC_ID(idx) (GUINT_TO_POINTER((idx)|(GetCurrentThreadId()<<8)))
 528
 529 /**
 530  * TlsFree:
 531  * @idx: The TLS index to free
 532  *
 533  * Releases a TLS index, making it available for reuse.  This call
 534  * will delete any TLS data stored under index @idx in all threads.
 535  *
 536  * Return value: %TRUE on success, %FALSE otherwise.
 537  */
 538 gboolean TlsFree(guint32 idx)
 539 {
 540 #ifdef TLS_DEBUG
 541         g_message (G_GNUC_PRETTY_FUNCTION ": freeing key %d", idx);
 542 #endif
 543
 544 #ifdef TLS_PTHREAD_MUTEX
 545         mono_mutex_lock(&TLS_mutex);
 546 #else
 547         MONO_SPIN_LOCK (TLS_spinlock);
 548 #endif
 549
 550         if(TLS_used[idx]==FALSE) {
 551 #ifdef TLS_PTHREAD_MUTEX
 552                 mono_mutex_unlock(&TLS_mutex);
 553 #else
 554                 MONO_SPIN_UNLOCK (TLS_spinlock);
 555 #endif
 556                 return(FALSE);
 557         }
 558
 559         TLS_used[idx]=FALSE;
 560         pthread_key_delete(TLS_keys[idx]);
 561
 562 #if HAVE_BOEHM_GC
 563         mono_g_hash_table_remove (tls_gc_hash, MAKE_GC_ID (idx));
 564 #endif
 565
 566 #ifdef TLS_PTHREAD_MUTEX
 567         mono_mutex_unlock(&TLS_mutex);
 568 #else
 569         MONO_SPIN_UNLOCK (TLS_spinlock);
 570 #endif
 571
 572         return(TRUE);
 573 }
 574
 575 /**
 576  * TlsGetValue:
 577  * @idx: The TLS index to retrieve
 578  *
 579  * Retrieves the TLS data stored under index @idx.
 580  *
 581  * Return value: The value stored in the TLS index @idx in the current
 582  * thread, or %NULL on error.  As %NULL can be a valid return value,
 583  * in this case GetLastError() returns %ERROR_SUCCESS.
 584  */
 585 gpointer TlsGetValue(guint32 idx)
 586 {
 587         gpointer ret;
 588
 589 #ifdef TLS_DEBUG
 590         g_message (G_GNUC_PRETTY_FUNCTION ": looking up key %d", idx);
 591 #endif
 592
 593 #ifdef TLS_PTHREAD_MUTEX
 594         mono_mutex_lock(&TLS_mutex);
 595 #else
 596         MONO_SPIN_LOCK (TLS_spinlock);
 597 #endif
 598
 599         if(TLS_used[idx]==FALSE) {
 600 #ifdef TLS_DEBUG
 601                 g_message (G_GNUC_PRETTY_FUNCTION ": key %d unused", idx);
 602 #endif
 603
 604 #ifdef TLS_PTHREAD_MUTEX
 605                 mono_mutex_unlock(&TLS_mutex);
 606 #else
 607                 MONO_SPIN_UNLOCK (TLS_spinlock);
 608 #endif
 609                 return(NULL);
 610         }
 611
 612         ret=pthread_getspecific(TLS_keys[idx]);
 613
 614 #ifdef TLS_DEBUG
 615         g_message (G_GNUC_PRETTY_FUNCTION ": returning %p", ret);
 616 #endif
 617
 618 #ifdef TLS_PTHREAD_MUTEX
 619         mono_mutex_unlock(&TLS_mutex);
 620 #else
 621         MONO_SPIN_UNLOCK (TLS_spinlock);
 622 #endif
 623
 624         return(ret);
 625 }
 626
 627 /**
 628  * TlsSetValue:
 629  * @idx: The TLS index to store
 630  * @value: The value to store under index @idx
 631  *
 632  * Stores @value at TLS index @idx.
 633  *
 634  * Return value: %TRUE on success, %FALSE otherwise.
 635  */
 636 gboolean TlsSetValue(guint32 idx, gpointer value)
 637 {
 638         int ret;
 639
 640 #ifdef TLS_DEBUG
 641         g_message (G_GNUC_PRETTY_FUNCTION ": setting key %d to %p", idx,
 642                    value);
 643 #endif
 644
 645 #ifdef TLS_PTHREAD_MUTEX
 646         mono_mutex_lock(&TLS_mutex);
 647 #else
 648         MONO_SPIN_LOCK (TLS_spinlock);
 649 #endif
 650
 651         if(TLS_used[idx]==FALSE) {
 652 #ifdef TLS_DEBUG
 653                 g_message (G_GNUC_PRETTY_FUNCTION ": key %d unused", idx);
 654 #endif
 655
 656 #ifdef TLS_PTHREAD_MUTEX
 657                 mono_mutex_unlock(&TLS_mutex);
 658 #else
 659                 MONO_SPIN_UNLOCK (TLS_spinlock);
 660 #endif
 661                 return(FALSE);
 662         }
 663
 664         ret=pthread_setspecific(TLS_keys[idx], value);
 665         if(ret!=0) {
 666 #ifdef TLS_DEBUG
 667                 g_message (G_GNUC_PRETTY_FUNCTION
 668                            ": pthread_setspecific error: %s", strerror (ret));
 669 #endif
 670
 671 #ifdef TLS_PTHREAD_MUTEX
 672                 mono_mutex_unlock(&TLS_mutex);
 673 #else
 674                 MONO_SPIN_UNLOCK (TLS_spinlock);
 675 #endif
 676                 return(FALSE);
 677         }
 678
 679 #if HAVE_BOEHM_GC
 680         if (!tls_gc_hash)
 681                 tls_gc_hash = mono_g_hash_table_new(g_direct_hash, g_direct_equal);
 682         mono_g_hash_table_insert (tls_gc_hash, MAKE_GC_ID (idx), value);
 683 #endif
 684
 685 #ifdef TLS_PTHREAD_MUTEX
 686         mono_mutex_unlock(&TLS_mutex);
 687 #else
 688         MONO_SPIN_UNLOCK (TLS_spinlock);
 689 #endif
 690
 691         return(TRUE);
 692 }
 693
 694 /**
 695  * Sleep:
 696  * @ms: The time in milliseconds to suspend for
 697  *
 698  * Suspends execution of the current thread for @ms milliseconds.  A
 699  * value of zero causes the thread to relinquish its time slice.  A
 700  * value of %INFINITE causes an infinite delay.
 701  */
 702 void Sleep(guint32 ms)
 703 {
 704         struct timespec req, rem;
 705         div_t divvy;
 706         int ret;
 707
 708 #ifdef DEBUG
 709         g_message(G_GNUC_PRETTY_FUNCTION ": Sleeping for %d ms", ms);
 710 #endif
 711
 712         if(ms==0) {
 713                 sched_yield();
 714                 return;
 715         }
 716
 717         /* FIXME: check for INFINITE and sleep forever */
 718         divvy=div((int)ms, 1000);
 719
 720         req.tv_sec=divvy.quot;
 721         req.tv_nsec=divvy.rem*1000000;
 722
 723 again:
 724         ret=nanosleep(&req, &rem);
 725         if(ret==-1) {
 726                 /* Sleep interrupted with rem time remaining */
 727 #ifdef DEBUG
 728                 guint32 rems=rem.tv_sec*1000 + rem.tv_nsec/1000000;
 729
 730                 g_message(G_GNUC_PRETTY_FUNCTION ": Still got %d ms to go",
 731                           rems);
 732 #endif
 733                 req=rem;
 734                 goto again;
 735         }
 736 }
 737
 738 /* FIXME: implement alertable */
 739 void SleepEx(guint32 ms, gboolean alertable)
 740 {
 741         if(alertable==TRUE) {
 742                 g_warning(G_GNUC_PRETTY_FUNCTION ": alertable not implemented");
 743         }
 744
 745         Sleep(ms);
 746 }