dlls/kernel/thread.c

   1 /*
   2  * Win32 threads
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <assert.h>
  25 #include <fcntl.h>
  26 #include <stdarg.h>
  27 #include <sys/types.h>
  28 #ifdef HAVE_SYS_TIMES_H
  29 #include <sys/times.h>
  30 #endif
  31 #ifdef HAVE_UNISTD_H
  32 # include <unistd.h>
  33 #endif
  34
  35 #include "ntstatus.h"
  36 #include "windef.h"
  37 #include "winbase.h"
  38 #include "winerror.h"
  39 #include "winnls.h"
  40 #include "thread.h"
  41 #include "module.h"
  42 #include "wine/winbase16.h"
  43 #include "wine/exception.h"
  44 #include "wine/library.h"
  45 #include "wine/pthread.h"
  46 #include "wine/server.h"
  47 #include "wine/debug.h"
  48
  49 #include "kernel_private.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(thread);
  52 WINE_DECLARE_DEBUG_CHANNEL(relay);
  53
  54
  55 /***********************************************************************
  56  *           THREAD_InitStack
  57  *
  58  * Allocate the stack of a thread.
  59  */
  60 TEB *THREAD_InitStack( TEB *teb, DWORD stack_size )
  61 {
  62     DWORD old_prot;
  63     DWORD page_size = getpagesize();
  64     void *base;
  65
  66     stack_size = (stack_size + (page_size - 1)) & ~(page_size - 1);
  67     if (stack_size < 1024 * 1024) stack_size = 1024 * 1024;  /* Xlib needs a large stack */
  68
  69     if (!(base = VirtualAlloc( NULL, stack_size, MEM_COMMIT, PAGE_READWRITE )))
  70         return NULL;
  71
  72     teb->DeallocationStack = base;
  73     teb->Tib.StackBase     = (char *)base + stack_size;
  74     teb->Tib.StackLimit    = base;  /* note: limit is lower than base since the stack grows down */
  75
  76     /* Setup guard pages */
  77
  78     VirtualProtect( base, 1, PAGE_READWRITE | PAGE_GUARD, &old_prot );
  79     return teb;
  80 }
  81
  82
  83 struct new_thread_info
  84 {
  85     LPTHREAD_START_ROUTINE func;
  86     void                  *arg;
  87 };
  88
  89 /***********************************************************************
  90  *           THREAD_Start
  91  *
  92  * Start execution of a newly created thread. Does not return.
  93  */
  94 static void CALLBACK THREAD_Start( void *ptr )
  95 {
  96     struct new_thread_info *info = ptr;
  97     LPTHREAD_START_ROUTINE func = info->func;
  98     void *arg = info->arg;
  99
 100     RtlFreeHeap( GetProcessHeap(), 0, info );
 101
 102     if (TRACE_ON(relay))
 103         DPRINTF("%04lx:Starting thread (entryproc=%p)\n", GetCurrentThreadId(), func );
 104
 105     __TRY
 106     {
 107         MODULE_DllThreadAttach( NULL );
 108         ExitThread( func( arg ) );
 109     }
 110     __EXCEPT(UnhandledExceptionFilter)
 111     {
 112         TerminateThread( GetCurrentThread(), GetExceptionCode() );
 113     }
 114     __ENDTRY
 115 }
 116
 117
 118 /***********************************************************************
 119  *           CreateThread   (KERNEL32.@)
 120  */
 121 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, SIZE_T stack,
 122                             LPTHREAD_START_ROUTINE start, LPVOID param,
 123                             DWORD flags, LPDWORD id )
 124 {
 125      return CreateRemoteThread( GetCurrentProcess(),
 126                                 sa, stack, start, param, flags, id );
 127 }
 128
 129
 130 /***************************************************************************
 131  *                  CreateRemoteThread   (KERNEL32.@)
 132  *
 133  * Creates a thread that runs in the address space of another process
 134  *
 135  * PARAMS
 136  *
 137  * RETURNS
 138  *   Success: Handle to the new thread.
 139  *   Failure: NULL. Use GetLastError() to find the error cause.
 140  *
 141  * BUGS
 142  *   Improper memory allocation: there's no ability to free new_thread_info
 143  *   in other process.
 144  *   Bad start address for RtlCreateUserThread because the library
 145  *   may be loaded at different address in other process.
 146  */
 147 HANDLE WINAPI CreateRemoteThread( HANDLE hProcess, SECURITY_ATTRIBUTES *sa, SIZE_T stack,
 148                                   LPTHREAD_START_ROUTINE start, LPVOID param,
 149                                   DWORD flags, LPDWORD id )
 150 {
 151     HANDLE handle;
 152     CLIENT_ID client_id;
 153     NTSTATUS status;
 154     SIZE_T stack_reserve = 0, stack_commit = 0;
 155     struct new_thread_info *info;
 156
 157     if (!(info = RtlAllocateHeap( GetProcessHeap(), 0, sizeof(*info) )))
 158     {
 159         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 160         return 0;
 161     }
 162     info->func = start;
 163     info->arg  = param;
 164
 165     if (flags & STACK_SIZE_PARAM_IS_A_RESERVATION) stack_reserve = stack;
 166     else stack_commit = stack;
 167
 168     status = RtlCreateUserThread( hProcess, NULL, TRUE,
 169                                   NULL, stack_reserve, stack_commit,
 170                                   THREAD_Start, info, &handle, &client_id );
 171     if (status == STATUS_SUCCESS)
 172     {
 173         if (id) *id = (DWORD)client_id.UniqueThread;
 174         if (sa && (sa->nLength >= sizeof(*sa)) && sa->bInheritHandle)
 175             SetHandleInformation( handle, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT );
 176         if (!(flags & CREATE_SUSPENDED))
 177         {
 178             ULONG ret;
 179             if (NtResumeThread( handle, &ret ))
 180             {
 181                 NtClose( handle );
 182                 RtlFreeHeap( GetProcessHeap(), 0, info );
 183                 SetLastError( ERROR_NOT_ENOUGH_MEMORY );
 184                 handle = 0;
 185             }
 186         }
 187     }
 188     else
 189     {
 190         RtlFreeHeap( GetProcessHeap(), 0, info );
 191         SetLastError( RtlNtStatusToDosError(status) );
 192         handle = 0;
 193     }
 194     return handle;
 195 }
 196
 197
 198 /***********************************************************************
 199  * OpenThread  [KERNEL32.@]   Retrieves a handle to a thread from its thread id
 200  */
 201 HANDLE WINAPI OpenThread( DWORD dwDesiredAccess, BOOL bInheritHandle, DWORD dwThreadId )
 202 {
 203     HANDLE ret = 0;
 204     SERVER_START_REQ( open_thread )
 205     {
 206         req->tid     = dwThreadId;
 207         req->access  = dwDesiredAccess;
 208         req->inherit = bInheritHandle;
 209         if (!wine_server_call_err( req )) ret = reply->handle;
 210     }
 211     SERVER_END_REQ;
 212     return ret;
 213 }
 214
 215
 216 /***********************************************************************
 217  * ExitThread [KERNEL32.@]  Ends a thread
 218  *
 219  * RETURNS
 220  *    None
 221  */
 222 void WINAPI ExitThread( DWORD code ) /* [in] Exit code for this thread */
 223 {
 224     BOOL last;
 225     SERVER_START_REQ( terminate_thread )
 226     {
 227         /* send the exit code to the server */
 228         req->handle    = GetCurrentThread();
 229         req->exit_code = code;
 230         wine_server_call( req );
 231         last = reply->last;
 232     }
 233     SERVER_END_REQ;
 234
 235     if (last)
 236     {
 237         LdrShutdownProcess();
 238         exit( code );
 239     }
 240     else
 241     {
 242         LdrShutdownThread();
 243         wine_server_exit_thread( code );
 244     }
 245 }
 246
 247
 248 /**********************************************************************
 249  * TerminateThread [KERNEL32.@]  Terminates a thread
 250  *
 251  * RETURNS
 252  *    Success: TRUE
 253  *    Failure: FALSE
 254  */
 255 BOOL WINAPI TerminateThread( HANDLE handle,    /* [in] Handle to thread */
 256                              DWORD exit_code)  /* [in] Exit code for thread */
 257 {
 258     NTSTATUS status = NtTerminateThread( handle, exit_code );
 259     if (status) SetLastError( RtlNtStatusToDosError(status) );
 260     return !status;
 261 }
 262
 263
 264 /***********************************************************************
 265  *           FreeLibraryAndExitThread (KERNEL32.@)
 266  */
 267 void WINAPI FreeLibraryAndExitThread(HINSTANCE hLibModule, DWORD dwExitCode)
 268 {
 269     FreeLibrary(hLibModule);
 270     ExitThread(dwExitCode);
 271 }
 272
 273
 274 /**********************************************************************
 275  *              GetExitCodeThread (KERNEL32.@)
 276  *
 277  * Gets termination status of thread.
 278  *
 279  * RETURNS
 280  *    Success: TRUE
 281  *    Failure: FALSE
 282  */
 283 BOOL WINAPI GetExitCodeThread(
 284     HANDLE hthread, /* [in]  Handle to thread */
 285     LPDWORD exitcode) /* [out] Address to receive termination status */
 286 {
 287     THREAD_BASIC_INFORMATION info;
 288     NTSTATUS status = NtQueryInformationThread( hthread, ThreadBasicInformation,
 289                                                 &info, sizeof(info), NULL );
 290
 291     if (status)
 292     {
 293         SetLastError( RtlNtStatusToDosError(status) );
 294         return FALSE;
 295     }
 296     if (exitcode) *exitcode = info.ExitStatus;
 297     return TRUE;
 298 }
 299
 300
 301 /***********************************************************************
 302  * SetThreadContext [KERNEL32.@]  Sets context of thread.
 303  *
 304  * RETURNS
 305  *    Success: TRUE
 306  *    Failure: FALSE
 307  */
 308 BOOL WINAPI SetThreadContext( HANDLE handle,           /* [in]  Handle to thread with context */
 309                               const CONTEXT *context ) /* [in] Address of context structure */
 310 {
 311     NTSTATUS status = NtSetContextThread( handle, context );
 312     if (status) SetLastError( RtlNtStatusToDosError(status) );
 313     return !status;
 314 }
 315
 316
 317 /***********************************************************************
 318  * GetThreadContext [KERNEL32.@]  Retrieves context of thread.
 319  *
 320  * RETURNS
 321  *    Success: TRUE
 322  *    Failure: FALSE
 323  */
 324 BOOL WINAPI GetThreadContext( HANDLE handle,     /* [in]  Handle to thread with context */
 325                               CONTEXT *context ) /* [out] Address of context structure */
 326 {
 327     NTSTATUS status = NtGetContextThread( handle, context );
 328     if (status) SetLastError( RtlNtStatusToDosError(status) );
 329     return !status;
 330 }
 331
 332
 333 /**********************************************************************
 334  * SuspendThread [KERNEL32.@]  Suspends a thread.
 335  *
 336  * RETURNS
 337  *    Success: Previous suspend count
 338  *    Failure: 0xFFFFFFFF
 339  */
 340 DWORD WINAPI SuspendThread( HANDLE hthread ) /* [in] Handle to the thread */
 341 {
 342     DWORD ret;
 343     NTSTATUS status = NtSuspendThread( hthread, &ret );
 344
 345     if (status)
 346     {
 347         ret = ~0U;
 348         SetLastError( RtlNtStatusToDosError(status) );
 349     }
 350     return ret;
 351 }
 352
 353
 354 /**********************************************************************
 355  * ResumeThread [KERNEL32.@]  Resumes a thread.
 356  *
 357  * Decrements a thread's suspend count.  When count is zero, the
 358  * execution of the thread is resumed.
 359  *
 360  * RETURNS
 361  *    Success: Previous suspend count
 362  *    Failure: 0xFFFFFFFF
 363  *    Already running: 0
 364  */
 365 DWORD WINAPI ResumeThread( HANDLE hthread ) /* [in] Identifies thread to restart */
 366 {
 367     DWORD ret;
 368     NTSTATUS status = NtResumeThread( hthread, &ret );
 369
 370     if (status)
 371     {
 372         ret = ~0U;
 373         SetLastError( RtlNtStatusToDosError(status) );
 374     }
 375     return ret;
 376 }
 377
 378
 379 /**********************************************************************
 380  * GetThreadPriority [KERNEL32.@]  Returns priority for thread.
 381  *
 382  * RETURNS
 383  *    Success: Thread's priority level.
 384  *    Failure: THREAD_PRIORITY_ERROR_RETURN
 385  */
 386 INT WINAPI GetThreadPriority(
 387     HANDLE hthread) /* [in] Handle to thread */
 388 {
 389     THREAD_BASIC_INFORMATION info;
 390     NTSTATUS status = NtQueryInformationThread( hthread, ThreadBasicInformation,
 391                                                 &info, sizeof(info), NULL );
 392
 393     if (status)
 394     {
 395         SetLastError( RtlNtStatusToDosError(status) );
 396         return THREAD_PRIORITY_ERROR_RETURN;
 397     }
 398     return info.Priority;
 399 }
 400
 401
 402 /**********************************************************************
 403  * SetThreadPriority [KERNEL32.@]  Sets priority for thread.
 404  *
 405  * RETURNS
 406  *    Success: TRUE
 407  *    Failure: FALSE
 408  */
 409 BOOL WINAPI SetThreadPriority(
 410     HANDLE hthread, /* [in] Handle to thread */
 411     INT priority)   /* [in] Thread priority level */
 412 {
 413     BOOL ret;
 414     SERVER_START_REQ( set_thread_info )
 415     {
 416         req->handle   = hthread;
 417         req->priority = priority;
 418         req->mask     = SET_THREAD_INFO_PRIORITY;
 419         ret = !wine_server_call_err( req );
 420     }
 421     SERVER_END_REQ;
 422     return ret;
 423 }
 424
 425
 426 /**********************************************************************
 427  * GetThreadPriorityBoost [KERNEL32.@]  Returns priority boost for thread.
 428  *
 429  * Always reports that priority boost is disabled.
 430  *
 431  * RETURNS
 432  *    Success: TRUE.
 433  *    Failure: FALSE
 434  */
 435 BOOL WINAPI GetThreadPriorityBoost(
 436     HANDLE hthread, /* [in] Handle to thread */
 437     PBOOL pstate)   /* [out] pointer to var that receives the boost state */
 438 {
 439     if (pstate) *pstate = FALSE;
 440     return NO_ERROR;
 441 }
 442
 443
 444 /**********************************************************************
 445  * SetThreadPriorityBoost [KERNEL32.@]  Sets priority boost for thread.
 446  *
 447  * Priority boost is not implemented. Thsi function always returns
 448  * FALSE and sets last error to ERROR_CALL_NOT_IMPLEMENTED
 449  *
 450  * RETURNS
 451  *    Always returns FALSE to indicate a failure
 452  */
 453 BOOL WINAPI SetThreadPriorityBoost(
 454     HANDLE hthread, /* [in] Handle to thread */
 455     BOOL disable)   /* [in] TRUE to disable priority boost */
 456 {
 457     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 458     return FALSE;
 459 }
 460
 461
 462 /**********************************************************************
 463  *           SetThreadAffinityMask   (KERNEL32.@)
 464  */
 465 DWORD WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD dwThreadAffinityMask )
 466 {
 467     DWORD ret;
 468     SERVER_START_REQ( set_thread_info )
 469     {
 470         req->handle   = hThread;
 471         req->affinity = dwThreadAffinityMask;
 472         req->mask     = SET_THREAD_INFO_AFFINITY;
 473         ret = !wine_server_call_err( req );
 474         /* FIXME: should return previous value */
 475     }
 476     SERVER_END_REQ;
 477     return ret;
 478 }
 479
 480
 481 /**********************************************************************
 482  * SetThreadIdealProcessor [KERNEL32.@]  Obtains timing information.
 483  *
 484  * RETURNS
 485  *    Success: Value of last call to SetThreadIdealProcessor
 486  *    Failure: -1
 487  */
 488 DWORD WINAPI SetThreadIdealProcessor(
 489     HANDLE hThread,          /* [in] Specifies the thread of interest */
 490     DWORD dwIdealProcessor)  /* [in] Specifies the new preferred processor */
 491 {
 492     FIXME("(%p): stub\n",hThread);
 493     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 494     return -1L;
 495 }
 496
 497
 498 /* callback for QueueUserAPC */
 499 static void CALLBACK call_user_apc( ULONG_PTR arg1, ULONG_PTR arg2, ULONG_PTR arg3 )
 500 {
 501     PAPCFUNC func = (PAPCFUNC)arg1;
 502     func( arg2 );
 503 }
 504
 505 /***********************************************************************
 506  *              QueueUserAPC  (KERNEL32.@)
 507  */
 508 DWORD WINAPI QueueUserAPC( PAPCFUNC func, HANDLE hthread, ULONG_PTR data )
 509 {
 510     NTSTATUS status = NtQueueApcThread( hthread, call_user_apc, (ULONG_PTR)func, data, 0 );
 511
 512     if (status) SetLastError( RtlNtStatusToDosError(status) );
 513     return !status;
 514 }
 515
 516 /***********************************************************************
 517  *              QueueUserWorkItem  (KERNEL32.@)
 518  */
 519 BOOL WINAPI QueueUserWorkItem( LPTHREAD_START_ROUTINE Function, PVOID Context, ULONG Flags )
 520 {
 521     FIXME("(%p,%p,0x%08lx): stub\n", Function, Context, Flags);
 522     return FALSE;
 523 }
 524
 525 /**********************************************************************
 526  * GetThreadTimes [KERNEL32.@]  Obtains timing information.
 527  *
 528  * RETURNS
 529  *    Success: TRUE
 530  *    Failure: FALSE
 531  */
 532 BOOL WINAPI GetThreadTimes(
 533     HANDLE thread,         /* [in]  Specifies the thread of interest */
 534     LPFILETIME creationtime, /* [out] When the thread was created */
 535     LPFILETIME exittime,     /* [out] When the thread was destroyed */
 536     LPFILETIME kerneltime,   /* [out] Time thread spent in kernel mode */
 537     LPFILETIME usertime)     /* [out] Time thread spent in user mode */
 538 {
 539     BOOL ret = TRUE;
 540
 541     if (creationtime || exittime)
 542     {
 543         /* We need to do a server call to get the creation time or exit time */
 544         /* This works on any thread */
 545
 546         SERVER_START_REQ( get_thread_info )
 547         {
 548             req->handle = thread;
 549             req->tid_in = 0;
 550             if ((ret = !wine_server_call_err( req )))
 551             {
 552                 if (creationtime)
 553                     RtlSecondsSince1970ToTime( reply->creation_time, (LARGE_INTEGER*)creationtime );
 554                 if (exittime)
 555                     RtlSecondsSince1970ToTime( reply->exit_time, (LARGE_INTEGER*)exittime );
 556             }
 557         }
 558         SERVER_END_REQ;
 559     }
 560     if (ret && (kerneltime || usertime))
 561     {
 562         /* We call times(2) for kernel time or user time */
 563         /* We can only (portably) do this for the current thread */
 564         if (thread == GetCurrentThread())
 565         {
 566             ULONGLONG time;
 567             struct tms time_buf;
 568             long clocks_per_sec = sysconf(_SC_CLK_TCK);
 569
 570             times(&time_buf);
 571             if (kerneltime)
 572             {
 573                 time = (ULONGLONG)time_buf.tms_stime * 10000000 / clocks_per_sec;
 574                 kerneltime->dwHighDateTime = time >> 32;
 575                 kerneltime->dwLowDateTime = (DWORD)time;
 576             }
 577             if (usertime)
 578             {
 579                 time = (ULONGLONG)time_buf.tms_utime * 10000000 / clocks_per_sec;
 580                 usertime->dwHighDateTime = time >> 32;
 581                 usertime->dwLowDateTime = (DWORD)time;
 582             }
 583         }
 584         else
 585         {
 586             if (kerneltime) kerneltime->dwHighDateTime = kerneltime->dwLowDateTime = 0;
 587             if (usertime) usertime->dwHighDateTime = usertime->dwLowDateTime = 0;
 588             FIXME("Cannot get kerneltime or usertime of other threads\n");
 589         }
 590     }
 591     return ret;
 592 }
 593
 594
 595 /**********************************************************************
 596  * VWin32_BoostThreadGroup [KERNEL.535]
 597  */
 598 VOID WINAPI VWin32_BoostThreadGroup( DWORD threadId, INT boost )
 599 {
 600     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 601 }
 602
 603
 604 /**********************************************************************
 605  * VWin32_BoostThreadStatic [KERNEL.536]
 606  */
 607 VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
 608 {
 609     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 610 }
 611
 612
 613 /***********************************************************************
 614  * GetCurrentThread [KERNEL32.@]  Gets pseudohandle for current thread
 615  *
 616  * RETURNS
 617  *    Pseudohandle for the current thread
 618  */
 619 #undef GetCurrentThread
 620 HANDLE WINAPI GetCurrentThread(void)
 621 {
 622     return (HANDLE)0xfffffffe;
 623 }
 624
 625
 626 #ifdef __i386__
 627
 628 /***********************************************************************
 629  *              SetLastError (KERNEL.147)
 630  *              SetLastError (KERNEL32.@)
 631  */
 632 /* void WINAPI SetLastError( DWORD error ); */
 633 __ASM_GLOBAL_FUNC( SetLastError,
 634                    "movl 4(%esp),%eax\n\t"
 635                    ".byte 0x64\n\t"
 636                    "movl %eax,0x34\n\t"
 637                    "ret $4" )
 638
 639 /***********************************************************************
 640  *              GetLastError (KERNEL.148)
 641  *              GetLastError (KERNEL32.@)
 642  */
 643 /* DWORD WINAPI GetLastError(void); */
 644 __ASM_GLOBAL_FUNC( GetLastError, ".byte 0x64\n\tmovl 0x34,%eax\n\tret" )
 645
 646 /***********************************************************************
 647  *              GetCurrentProcessId (KERNEL.471)
 648  *              GetCurrentProcessId (KERNEL32.@)
 649  */
 650 /* DWORD WINAPI GetCurrentProcessId(void) */
 651 __ASM_GLOBAL_FUNC( GetCurrentProcessId, ".byte 0x64\n\tmovl 0x20,%eax\n\tret" )
 652
 653 /***********************************************************************
 654  *              GetCurrentThreadId (KERNEL.462)
 655  *              GetCurrentThreadId (KERNEL32.@)
 656  */
 657 /* DWORD WINAPI GetCurrentThreadId(void) */
 658 __ASM_GLOBAL_FUNC( GetCurrentThreadId, ".byte 0x64\n\tmovl 0x24,%eax\n\tret" )
 659
 660 #else  /* __i386__ */
 661
 662 /**********************************************************************
 663  *              SetLastError (KERNEL.147)
 664  *              SetLastError (KERNEL32.@)
 665  *
 666  * Sets the last-error code.
 667  */
 668 void WINAPI SetLastError( DWORD error ) /* [in] Per-thread error code */
 669 {
 670     NtCurrentTeb()->LastErrorValue = error;
 671 }
 672
 673 /**********************************************************************
 674  *              GetLastError (KERNEL.148)
 675  *              GetLastError (KERNEL32.@)
 676  *
 677  * Returns last-error code.
 678  */
 679 DWORD WINAPI GetLastError(void)
 680 {
 681     return NtCurrentTeb()->LastErrorValue;
 682 }
 683
 684 /***********************************************************************
 685  *              GetCurrentProcessId (KERNEL.471)
 686  *              GetCurrentProcessId (KERNEL32.@)
 687  *
 688  * Returns process identifier.
 689  */
 690 DWORD WINAPI GetCurrentProcessId(void)
 691 {
 692     return (DWORD)NtCurrentTeb()->ClientId.UniqueProcess;
 693 }
 694
 695 /***********************************************************************
 696  *              GetCurrentThreadId (KERNEL.462)
 697  *              GetCurrentThreadId (KERNEL32.@)
 698  *
 699  * Returns thread identifier.
 700  */
 701 DWORD WINAPI GetCurrentThreadId(void)
 702 {
 703     return (DWORD)NtCurrentTeb()->ClientId.UniqueThread;
 704 }
 705
 706 #endif  /* __i386__ */