scheduler/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 <sys/types.h>
  27 #ifdef HAVE_SYS_MMAN_H
  28 #include <sys/mman.h>
  29 #endif
  30 #include <unistd.h>
  31 #include "wine/winbase16.h"
  32 #include "thread.h"
  33 #include "task.h"
  34 #include "module.h"
  35 #include "winerror.h"
  36 #include "selectors.h"
  37 #include "winnt.h"
  38 #include "wine/server.h"
  39 #include "stackframe.h"
  40 #include "wine/debug.h"
  41 #include "winnls.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(thread);
  44 WINE_DECLARE_DEBUG_CHANNEL(relay);
  45
  46 /* TEB of the initial thread */
  47 static TEB initial_teb;
  48
  49 extern struct _PDB current_process;
  50
  51 /***********************************************************************
  52  *           THREAD_IdToTEB
  53  *
  54  * Convert a thread id to a TEB, making sure it is valid.
  55  */
  56 TEB *THREAD_IdToTEB( DWORD id )
  57 {
  58     TEB *ret = NULL;
  59
  60     if (!id || id == GetCurrentThreadId()) return NtCurrentTeb();
  61
  62     SERVER_START_REQ( get_thread_info )
  63     {
  64         req->handle = 0;
  65         req->tid_in = (void *)id;
  66         if (!wine_server_call( req )) ret = reply->teb;
  67     }
  68     SERVER_END_REQ;
  69
  70     if (!ret)
  71     {
  72         /* Allow task handles to be used; convert to main thread */
  73         if ( IsTask16( id ) )
  74         {
  75             TDB *pTask = TASK_GetPtr( id );
  76             if (pTask) return pTask->teb;
  77         }
  78         SetLastError( ERROR_INVALID_PARAMETER );
  79     }
  80     return ret;
  81 }
  82
  83
  84 /***********************************************************************
  85  *           THREAD_InitTEB
  86  *
  87  * Initialization of a newly created TEB.
  88  */
  89 static BOOL THREAD_InitTEB( TEB *teb )
  90 {
  91     teb->except    = (void *)~0UL;
  92     teb->self      = teb;
  93     teb->tibflags  = TEBF_WIN32;
  94     teb->tls_ptr   = teb->tls_array;
  95     teb->exit_code = STILL_ACTIVE;
  96     teb->request_fd = -1;
  97     teb->reply_fd   = -1;
  98     teb->wait_fd[0] = -1;
  99     teb->wait_fd[1] = -1;
 100     teb->stack_top  = (void *)~0UL;
 101     teb->StaticUnicodeString.MaximumLength = sizeof(teb->StaticUnicodeBuffer);
 102     teb->StaticUnicodeString.Buffer = (PWSTR)teb->StaticUnicodeBuffer;
 103     teb->teb_sel = SELECTOR_AllocBlock( teb, 0x1000, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
 104     return (teb->teb_sel != 0);
 105 }
 106
 107
 108 /***********************************************************************
 109  *           THREAD_FreeTEB
 110  *
 111  * Free data structures associated with a thread.
 112  * Must be called from the context of another thread.
 113  */
 114 static void THREAD_FreeTEB( TEB *teb )
 115 {
 116     TRACE("(%p) called\n", teb );
 117     /* Free the associated memory */
 118     FreeSelector16( teb->stack_sel );
 119     FreeSelector16( teb->teb_sel );
 120     VirtualFree( teb->stack_base, 0, MEM_RELEASE );
 121 }
 122
 123
 124 /***********************************************************************
 125  *           THREAD_InitStack
 126  *
 127  * Allocate the stack of a thread.
 128  */
 129 TEB *THREAD_InitStack( TEB *teb, DWORD stack_size )
 130 {
 131     DWORD old_prot, total_size;
 132     DWORD page_size = getpagesize();
 133     void *base;
 134
 135     /* Allocate the stack */
 136
 137     if (stack_size >= 16*1024*1024)
 138         WARN("Thread stack size is %ld MB.\n",stack_size/1024/1024);
 139
 140     /* if size is smaller than default, get stack size from parent */
 141     if (stack_size < 1024 * 1024)
 142     {
 143         if (teb)
 144             stack_size = 1024 * 1024;  /* no parent */
 145         else
 146             stack_size = ((char *)NtCurrentTeb()->stack_top - (char *)NtCurrentTeb()->stack_base
 147                           - SIGNAL_STACK_SIZE - 3 * page_size);
 148     }
 149
 150     /* FIXME: some Wine functions use a lot of stack, so we add 64Kb here */
 151     stack_size += 64 * 1024;
 152
 153     /* Memory layout in allocated block:
 154      *
 155      *   size                 contents
 156      * 1 page              NOACCESS guard page
 157      * SIGNAL_STACK_SIZE   signal stack
 158      * 1 page              NOACCESS guard page
 159      * 1 page              PAGE_GUARD guard page
 160      * stack_size          normal stack
 161      * 64Kb                16-bit stack (optional)
 162      * 1 page              TEB (except for initial thread)
 163      * 1 page              debug info (except for initial thread)
 164      */
 165
 166     stack_size = (stack_size + (page_size - 1)) & ~(page_size - 1);
 167     total_size = stack_size + SIGNAL_STACK_SIZE + 3 * page_size;
 168     total_size += 0x10000; /* 16-bit stack */
 169     if (!teb) total_size += 2 * page_size;
 170
 171     if (!(base = VirtualAlloc( NULL, total_size, MEM_COMMIT, PAGE_EXECUTE_READWRITE )))
 172         return NULL;
 173
 174     if (!teb)
 175     {
 176         teb = (TEB *)((char *)base + total_size - 2 * page_size);
 177         if (!THREAD_InitTEB( teb )) goto error;
 178         teb->debug_info = (char *)teb + page_size;
 179     }
 180
 181     teb->stack_low    = base;
 182     teb->stack_base   = base;
 183     teb->signal_stack = (char *)base + page_size;
 184     teb->stack_top    = (char *)base + 3 * page_size + SIGNAL_STACK_SIZE + stack_size;
 185
 186     /* Setup guard pages */
 187
 188     VirtualProtect( base, 1, PAGE_NOACCESS, &old_prot );
 189     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE, 1, PAGE_NOACCESS, &old_prot );
 190     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE + page_size, 1,
 191                     PAGE_EXECUTE_READWRITE | PAGE_GUARD, &old_prot );
 192
 193     /* Allocate the 16-bit stack selector */
 194
 195     teb->stack_sel = SELECTOR_AllocBlock( teb->stack_top, 0x10000, WINE_LDT_FLAGS_DATA );
 196     if (!teb->stack_sel) goto error;
 197     teb->cur_stack = MAKESEGPTR( teb->stack_sel, 0x10000 - sizeof(STACK16FRAME) );
 198
 199     return teb;
 200
 201 error:
 202     FreeSelector16( teb->teb_sel );
 203     VirtualFree( base, 0, MEM_RELEASE );
 204     return NULL;
 205 }
 206
 207
 208 /***********************************************************************
 209  *           thread_errno_location
 210  *
 211  * Get the per-thread errno location.
 212  */
 213 static int *thread_errno_location(void)
 214 {
 215     return &NtCurrentTeb()->thread_errno;
 216 }
 217
 218 /***********************************************************************
 219  *           thread_h_errno_location
 220  *
 221  * Get the per-thread h_errno location.
 222  */
 223 static int *thread_h_errno_location(void)
 224 {
 225     return &NtCurrentTeb()->thread_h_errno;
 226 }
 227
 228 /***********************************************************************
 229  *           THREAD_Init
 230  *
 231  * Setup the initial thread.
 232  *
 233  * NOTES: The first allocated TEB on NT is at 0x7ffde000.
 234  */
 235 void THREAD_Init(void)
 236 {
 237     if (!initial_teb.self)  /* do it only once */
 238     {
 239         THREAD_InitTEB( &initial_teb );
 240         assert( initial_teb.teb_sel );
 241         initial_teb.process = &current_process;
 242         SYSDEPS_SetCurThread( &initial_teb );
 243         wine_errno_location = thread_errno_location;
 244         wine_h_errno_location = thread_h_errno_location;
 245     }
 246 }
 247
 248 DECL_GLOBAL_CONSTRUCTOR(thread_init) { THREAD_Init(); }
 249
 250
 251 /***********************************************************************
 252  *           THREAD_Start
 253  *
 254  * Start execution of a newly created thread. Does not return.
 255  */
 256 static void THREAD_Start(void)
 257 {
 258     LPTHREAD_START_ROUTINE func = (LPTHREAD_START_ROUTINE)NtCurrentTeb()->entry_point;
 259
 260     if (TRACE_ON(relay))
 261         DPRINTF("%08lx:Starting thread (entryproc=%p)\n", GetCurrentThreadId(), func );
 262
 263     PROCESS_CallUserSignalProc( USIG_THREAD_INIT, 0 );
 264     MODULE_DllThreadAttach( NULL );
 265     ExitThread( func( NtCurrentTeb()->entry_arg ) );
 266 }
 267
 268
 269 /***********************************************************************
 270  *           CreateThread   (KERNEL32.@)
 271  */
 272 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, DWORD stack,
 273                             LPTHREAD_START_ROUTINE start, LPVOID param,
 274                             DWORD flags, LPDWORD id )
 275 {
 276     HANDLE handle = 0;
 277     TEB *teb;
 278     void *tid = 0;
 279     int request_pipe[2];
 280
 281     if (pipe( request_pipe ) == -1)
 282     {
 283         SetLastError( ERROR_TOO_MANY_OPEN_FILES );
 284         return 0;
 285     }
 286     fcntl( request_pipe[1], F_SETFD, 1 ); /* set close on exec flag */
 287     wine_server_send_fd( request_pipe[0] );
 288
 289     SERVER_START_REQ( new_thread )
 290     {
 291         req->suspend    = ((flags & CREATE_SUSPENDED) != 0);
 292         req->inherit    = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
 293         req->request_fd = request_pipe[0];
 294         if (!wine_server_call_err( req ))
 295         {
 296             handle = reply->handle;
 297             tid = reply->tid;
 298         }
 299         close( request_pipe[0] );
 300     }
 301     SERVER_END_REQ;
 302
 303     if (!handle || !(teb = THREAD_InitStack( NULL, stack )))
 304     {
 305         close( request_pipe[1] );
 306         return 0;
 307     }
 308
 309     teb->process     = NtCurrentTeb()->process;
 310     teb->tid         = tid;
 311     teb->request_fd  = request_pipe[1];
 312     teb->entry_point = start;
 313     teb->entry_arg   = param;
 314     teb->startup     = THREAD_Start;
 315     teb->htask16     = GetCurrentTask();
 316
 317     if (id) *id = (DWORD)tid;
 318     if (SYSDEPS_SpawnThread( teb ) == -1)
 319     {
 320         CloseHandle( handle );
 321         close( request_pipe[1] );
 322         THREAD_FreeTEB( teb );
 323         return 0;
 324     }
 325     return handle;
 326 }
 327
 328 /***********************************************************************
 329  *           CreateThread16   (KERNEL.441)
 330  */
 331 static DWORD CALLBACK THREAD_StartThread16( LPVOID threadArgs )
 332 {
 333     FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
 334     DWORD     param = ((DWORD *)threadArgs)[1];
 335     HeapFree( GetProcessHeap(), 0, threadArgs );
 336
 337     ((LPDWORD)CURRENT_STACK16)[-1] = param;
 338     return wine_call_to_16_long( start, sizeof(DWORD) );
 339 }
 340 HANDLE WINAPI CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 341                               FARPROC16 start, SEGPTR param,
 342                               DWORD flags, LPDWORD id )
 343 {
 344     DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
 345     if (!threadArgs) return INVALID_HANDLE_VALUE;
 346     threadArgs[0] = (DWORD)start;
 347     threadArgs[1] = (DWORD)param;
 348
 349     return CreateThread( sa, stack, THREAD_StartThread16, threadArgs, flags, id );
 350 }
 351
 352
 353 /***********************************************************************
 354  * ExitThread [KERNEL32.@]  Ends a thread
 355  *
 356  * RETURNS
 357  *    None
 358  */
 359 void WINAPI ExitThread( DWORD code ) /* [in] Exit code for this thread */
 360 {
 361     BOOL last;
 362     SERVER_START_REQ( terminate_thread )
 363     {
 364         /* send the exit code to the server */
 365         req->handle    = GetCurrentThread();
 366         req->exit_code = code;
 367         wine_server_call( req );
 368         last = reply->last;
 369     }
 370     SERVER_END_REQ;
 371
 372     if (last)
 373     {
 374         MODULE_DllProcessDetach( TRUE, (LPVOID)1 );
 375         exit( code );
 376     }
 377     else
 378     {
 379         MODULE_DllThreadDetach( NULL );
 380         if (!(NtCurrentTeb()->tibflags & TEBF_WIN32)) TASK_ExitTask();
 381         SYSDEPS_ExitThread( code );
 382     }
 383 }
 384
 385
 386 /***********************************************************************
 387  * SetThreadContext [KERNEL32.@]  Sets context of thread.
 388  *
 389  * RETURNS
 390  *    Success: TRUE
 391  *    Failure: FALSE
 392  */
 393 BOOL WINAPI SetThreadContext( HANDLE handle,           /* [in]  Handle to thread with context */
 394                               const CONTEXT *context ) /* [in] Address of context structure */
 395 {
 396     BOOL ret;
 397     SERVER_START_REQ( set_thread_context )
 398     {
 399         req->handle = handle;
 400         req->flags = context->ContextFlags;
 401         wine_server_add_data( req, context, sizeof(*context) );
 402         ret = !wine_server_call_err( req );
 403     }
 404     SERVER_END_REQ;
 405     return ret;
 406 }
 407
 408
 409 /***********************************************************************
 410  * GetThreadContext [KERNEL32.@]  Retrieves context of thread.
 411  *
 412  * RETURNS
 413  *    Success: TRUE
 414  *    Failure: FALSE
 415  */
 416 BOOL WINAPI GetThreadContext( HANDLE handle,     /* [in]  Handle to thread with context */
 417                               CONTEXT *context ) /* [out] Address of context structure */
 418 {
 419     BOOL ret;
 420     SERVER_START_REQ( get_thread_context )
 421     {
 422         req->handle = handle;
 423         req->flags = context->ContextFlags;
 424         wine_server_add_data( req, context, sizeof(*context) );
 425         wine_server_set_reply( req, context, sizeof(*context) );
 426         ret = !wine_server_call_err( req );
 427     }
 428     SERVER_END_REQ;
 429     return ret;
 430 }
 431
 432
 433 /**********************************************************************
 434  * GetThreadPriority [KERNEL32.@]  Returns priority for thread.
 435  *
 436  * RETURNS
 437  *    Success: Thread's priority level.
 438  *    Failure: THREAD_PRIORITY_ERROR_RETURN
 439  */
 440 INT WINAPI GetThreadPriority(
 441     HANDLE hthread) /* [in] Handle to thread */
 442 {
 443     INT ret = THREAD_PRIORITY_ERROR_RETURN;
 444     SERVER_START_REQ( get_thread_info )
 445     {
 446         req->handle = hthread;
 447         req->tid_in = 0;
 448         if (!wine_server_call_err( req )) ret = reply->priority;
 449     }
 450     SERVER_END_REQ;
 451     return ret;
 452 }
 453
 454
 455 /**********************************************************************
 456  * SetThreadPriority [KERNEL32.@]  Sets priority for thread.
 457  *
 458  * RETURNS
 459  *    Success: TRUE
 460  *    Failure: FALSE
 461  */
 462 BOOL WINAPI SetThreadPriority(
 463     HANDLE hthread, /* [in] Handle to thread */
 464     INT priority)   /* [in] Thread priority level */
 465 {
 466     BOOL ret;
 467     SERVER_START_REQ( set_thread_info )
 468     {
 469         req->handle   = hthread;
 470         req->priority = priority;
 471         req->mask     = SET_THREAD_INFO_PRIORITY;
 472         ret = !wine_server_call_err( req );
 473     }
 474     SERVER_END_REQ;
 475     return ret;
 476 }
 477
 478
 479 /**********************************************************************
 480  * GetThreadPriorityBoost [KERNEL32.@]  Returns priority boost for thread.
 481  *
 482  * Always reports that priority boost is disabled.
 483  *
 484  * RETURNS
 485  *    Success: TRUE.
 486  *    Failure: FALSE
 487  */
 488 BOOL WINAPI GetThreadPriorityBoost(
 489     HANDLE hthread, /* [in] Handle to thread */
 490     PBOOL pstate)   /* [out] pointer to var that receives the boost state */
 491 {
 492     if (pstate) *pstate = FALSE;
 493     return NO_ERROR;
 494 }
 495
 496
 497 /**********************************************************************
 498  * SetThreadPriorityBoost [KERNEL32.@]  Sets priority boost for thread.
 499  *
 500  * Priority boost is not implemented. Thsi function always returns
 501  * FALSE and sets last error to ERROR_CALL_NOT_IMPLEMENTED
 502  *
 503  * RETURNS
 504  *    Always returns FALSE to indicate a failure
 505  */
 506 BOOL WINAPI SetThreadPriorityBoost(
 507     HANDLE hthread, /* [in] Handle to thread */
 508     BOOL disable)   /* [in] TRUE to disable priority boost */
 509 {
 510     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 511     return FALSE;
 512 }
 513
 514
 515 /**********************************************************************
 516  *           SetThreadAffinityMask   (KERNEL32.@)
 517  */
 518 DWORD WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD dwThreadAffinityMask )
 519 {
 520     DWORD ret;
 521     SERVER_START_REQ( set_thread_info )
 522     {
 523         req->handle   = hThread;
 524         req->affinity = dwThreadAffinityMask;
 525         req->mask     = SET_THREAD_INFO_AFFINITY;
 526         ret = !wine_server_call_err( req );
 527         /* FIXME: should return previous value */
 528     }
 529     SERVER_END_REQ;
 530     return ret;
 531 }
 532
 533
 534 /**********************************************************************
 535  * TerminateThread [KERNEL32.@]  Terminates a thread
 536  *
 537  * RETURNS
 538  *    Success: TRUE
 539  *    Failure: FALSE
 540  */
 541 BOOL WINAPI TerminateThread( HANDLE handle,    /* [in] Handle to thread */
 542                              DWORD exit_code)  /* [in] Exit code for thread */
 543 {
 544     NTSTATUS status = NtTerminateThread( handle, exit_code );
 545     if (status) SetLastError( RtlNtStatusToDosError(status) );
 546     return !status;
 547 }
 548
 549
 550 /**********************************************************************
 551  *              GetExitCodeThread (KERNEL32.@)
 552  *
 553  * Gets termination status of thread.
 554  *
 555  * RETURNS
 556  *    Success: TRUE
 557  *    Failure: FALSE
 558  */
 559 BOOL WINAPI GetExitCodeThread(
 560     HANDLE hthread, /* [in]  Handle to thread */
 561     LPDWORD exitcode) /* [out] Address to receive termination status */
 562 {
 563     BOOL ret;
 564     SERVER_START_REQ( get_thread_info )
 565     {
 566         req->handle = hthread;
 567         req->tid_in = 0;
 568         ret = !wine_server_call_err( req );
 569         if (ret && exitcode) *exitcode = reply->exit_code;
 570     }
 571     SERVER_END_REQ;
 572     return ret;
 573 }
 574
 575
 576 /**********************************************************************
 577  * ResumeThread [KERNEL32.@]  Resumes a thread.
 578  *
 579  * Decrements a thread's suspend count.  When count is zero, the
 580  * execution of the thread is resumed.
 581  *
 582  * RETURNS
 583  *    Success: Previous suspend count
 584  *    Failure: 0xFFFFFFFF
 585  *    Already running: 0
 586  */
 587 DWORD WINAPI ResumeThread(
 588     HANDLE hthread) /* [in] Identifies thread to restart */
 589 {
 590     DWORD ret = 0xffffffff;
 591     SERVER_START_REQ( resume_thread )
 592     {
 593         req->handle = hthread;
 594         if (!wine_server_call_err( req )) ret = reply->count;
 595     }
 596     SERVER_END_REQ;
 597     return ret;
 598 }
 599
 600
 601 /**********************************************************************
 602  * SuspendThread [KERNEL32.@]  Suspends a thread.
 603  *
 604  * RETURNS
 605  *    Success: Previous suspend count
 606  *    Failure: 0xFFFFFFFF
 607  */
 608 DWORD WINAPI SuspendThread(
 609     HANDLE hthread) /* [in] Handle to the thread */
 610 {
 611     DWORD ret = 0xffffffff;
 612     SERVER_START_REQ( suspend_thread )
 613     {
 614         req->handle = hthread;
 615         if (!wine_server_call_err( req )) ret = reply->count;
 616     }
 617     SERVER_END_REQ;
 618     return ret;
 619 }
 620
 621
 622 /***********************************************************************
 623  *              QueueUserAPC  (KERNEL32.@)
 624  */
 625 DWORD WINAPI QueueUserAPC( PAPCFUNC func, HANDLE hthread, ULONG_PTR data )
 626 {
 627     DWORD ret;
 628     SERVER_START_REQ( queue_apc )
 629     {
 630         req->handle = hthread;
 631         req->user   = 1;
 632         req->func   = func;
 633         req->param  = (void *)data;
 634         ret = !wine_server_call_err( req );
 635     }
 636     SERVER_END_REQ;
 637     return ret;
 638 }
 639
 640
 641 /**********************************************************************
 642  * GetThreadTimes [KERNEL32.@]  Obtains timing information.
 643  *
 644  * NOTES
 645  *    What are the fields where these values are stored?
 646  *
 647  * RETURNS
 648  *    Success: TRUE
 649  *    Failure: FALSE
 650  */
 651 BOOL WINAPI GetThreadTimes(
 652     HANDLE thread,         /* [in]  Specifies the thread of interest */
 653     LPFILETIME creationtime, /* [out] When the thread was created */
 654     LPFILETIME exittime,     /* [out] When the thread was destroyed */
 655     LPFILETIME kerneltime,   /* [out] Time thread spent in kernel mode */
 656     LPFILETIME usertime)     /* [out] Time thread spent in user mode */
 657 {
 658     FIXME("(0x%08x): stub\n",thread);
 659     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 660     return FALSE;
 661 }
 662
 663
 664 /**********************************************************************
 665  * VWin32_BoostThreadGroup [KERNEL.535]
 666  */
 667 VOID WINAPI VWin32_BoostThreadGroup( DWORD threadId, INT boost )
 668 {
 669     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 670 }
 671
 672 /**********************************************************************
 673  * VWin32_BoostThreadStatic [KERNEL.536]
 674  */
 675 VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
 676 {
 677     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 678 }
 679
 680
 681 /***********************************************************************
 682  *           GetThreadLocale    (KERNEL32.@)
 683  */
 684 LCID WINAPI GetThreadLocale(void)
 685 {
 686     LCID ret = NtCurrentTeb()->CurrentLocale;
 687     if (!ret) NtCurrentTeb()->CurrentLocale = ret = GetUserDefaultLCID();
 688     return ret;
 689 }
 690
 691
 692 /**********************************************************************
 693  * SetThreadLocale [KERNEL32.@]  Sets the calling threads current locale.
 694  *
 695  * RETURNS
 696  *    Success: TRUE
 697  *    Failure: FALSE
 698  *
 699  * FIXME
 700  *  check if lcid is a valid cp
 701  */
 702 BOOL WINAPI SetThreadLocale(
 703     LCID lcid)     /* [in] Locale identifier */
 704 {
 705     switch (lcid)
 706     {
 707       case LOCALE_SYSTEM_DEFAULT:
 708         lcid = GetSystemDefaultLCID();
 709         break;
 710       case LOCALE_USER_DEFAULT:
 711       case LOCALE_NEUTRAL:
 712         lcid = GetUserDefaultLCID();
 713         break;
 714     }
 715     NtCurrentTeb()->CurrentLocale = lcid;
 716     return TRUE;
 717 }
 718
 719
 720 /***********************************************************************
 721  * GetCurrentThread [KERNEL32.@]  Gets pseudohandle for current thread
 722  *
 723  * RETURNS
 724  *    Pseudohandle for the current thread
 725  */
 726 #undef GetCurrentThread
 727 HANDLE WINAPI GetCurrentThread(void)
 728 {
 729     return 0xfffffffe;
 730 }
 731
 732
 733 /***********************************************************************
 734  * ProcessIdToSessionId   (KERNEL32.@)
 735  * This function is available on Terminal Server 4SP4 and Windows 2000
 736  */
 737 BOOL WINAPI ProcessIdToSessionId( DWORD procid, DWORD *sessionid_ptr )
 738 {
 739         /* According to MSDN, if the calling process is not in a terminal
 740          * services environment, then the sessionid returned is zero.
 741          */
 742         *sessionid_ptr = 0;
 743         return TRUE;
 744 }
 745
 746 /***********************************************************************
 747  * SetThreadExecutionState (KERNEL32.@)
 748  *
 749  * Informs the system that activity is taking place for
 750  * power management purposes.
 751  */
 752 EXECUTION_STATE WINAPI SetThreadExecutionState(EXECUTION_STATE flags)
 753 {
 754     static EXECUTION_STATE current =
 755             ES_SYSTEM_REQUIRED|ES_DISPLAY_REQUIRED|ES_USER_PRESENT;
 756     EXECUTION_STATE old = current;
 757
 758     if (!(current & ES_CONTINUOUS) || (flags & ES_CONTINUOUS))
 759         current = flags;
 760     FIXME("(0x%lx): stub, harmless (power management).\n", flags);
 761     return old;
 762 }
 763
 764
 765 #ifdef __i386__
 766
 767 /***********************************************************************
 768  *              SetLastError (KERNEL.147)
 769  *              SetLastError (KERNEL32.@)
 770  */
 771 /* void WINAPI SetLastError( DWORD error ); */
 772 __ASM_GLOBAL_FUNC( SetLastError,
 773                    "movl 4(%esp),%eax\n\t"
 774                    ".byte 0x64\n\t"
 775                    "movl %eax,0x60\n\t"
 776                    "ret $4" );
 777
 778 /***********************************************************************
 779  *              GetLastError (KERNEL.148)
 780  *              GetLastError (KERNEL32.@)
 781  */
 782 /* DWORD WINAPI GetLastError(void); */
 783 __ASM_GLOBAL_FUNC( GetLastError, ".byte 0x64\n\tmovl 0x60,%eax\n\tret" );
 784
 785 /***********************************************************************
 786  *              GetCurrentProcessId (KERNEL.471)
 787  *              GetCurrentProcessId (KERNEL32.@)
 788  */
 789 /* DWORD WINAPI GetCurrentProcessId(void) */
 790 __ASM_GLOBAL_FUNC( GetCurrentProcessId, ".byte 0x64\n\tmovl 0x20,%eax\n\tret" );
 791
 792 /***********************************************************************
 793  *              GetCurrentThreadId (KERNEL.462)
 794  *              GetCurrentThreadId (KERNEL32.@)
 795  */
 796 /* DWORD WINAPI GetCurrentThreadId(void) */
 797 __ASM_GLOBAL_FUNC( GetCurrentThreadId, ".byte 0x64\n\tmovl 0x24,%eax\n\tret" );
 798
 799 #else  /* __i386__ */
 800
 801 /**********************************************************************
 802  *              SetLastError (KERNEL.147)
 803  *              SetLastError (KERNEL32.@)
 804  *
 805  * Sets the last-error code.
 806  */
 807 void WINAPI SetLastError( DWORD error ) /* [in] Per-thread error code */
 808 {
 809     NtCurrentTeb()->last_error = error;
 810 }
 811
 812 /**********************************************************************
 813  *              GetLastError (KERNEL.148)
 814  *              GetLastError (KERNEL32.@)
 815  *
 816  * Returns last-error code.
 817  */
 818 DWORD WINAPI GetLastError(void)
 819 {
 820     return NtCurrentTeb()->last_error;
 821 }
 822
 823 /***********************************************************************
 824  *              GetCurrentProcessId (KERNEL.471)
 825  *              GetCurrentProcessId (KERNEL32.@)
 826  *
 827  * Returns process identifier.
 828  */
 829 DWORD WINAPI GetCurrentProcessId(void)
 830 {
 831     return (DWORD)NtCurrentTeb()->pid;
 832 }
 833
 834 /***********************************************************************
 835  *              GetCurrentThreadId (KERNEL.462)
 836  *              GetCurrentThreadId (KERNEL32.@)
 837  *
 838  * Returns thread identifier.
 839  */
 840 DWORD WINAPI GetCurrentThreadId(void)
 841 {
 842     return (DWORD)NtCurrentTeb()->tid;
 843 }
 844
 845 #endif  /* __i386__ */