scheduler/thread.c

   1 /*
   2  * Win32 threads
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8 #include "wine/port.h"
   9
  10 #include <assert.h>
  11 #include <fcntl.h>
  12 #include <sys/types.h>
  13 #ifdef HAVE_SYS_MMAN_H
  14 #include <sys/mman.h>
  15 #endif
  16 #include <unistd.h>
  17 #include "wine/winbase16.h"
  18 #include "thread.h"
  19 #include "task.h"
  20 #include "module.h"
  21 #include "winerror.h"
  22 #include "selectors.h"
  23 #include "winnt.h"
  24 #include "wine/server.h"
  25 #include "stackframe.h"
  26 #include "debugtools.h"
  27 #include "winnls.h"
  28
  29 DEFAULT_DEBUG_CHANNEL(thread);
  30 DECLARE_DEBUG_CHANNEL(relay);
  31
  32 /* TEB of the initial thread */
  33 static TEB initial_teb;
  34
  35 extern struct _PDB current_process;
  36
  37 /***********************************************************************
  38  *           THREAD_IdToTEB
  39  *
  40  * Convert a thread id to a TEB, making sure it is valid.
  41  */
  42 TEB *THREAD_IdToTEB( DWORD id )
  43 {
  44     TEB *ret = NULL;
  45
  46     if (!id || id == GetCurrentThreadId()) return NtCurrentTeb();
  47
  48     SERVER_START_REQ( get_thread_info )
  49     {
  50         req->handle = 0;
  51         req->tid_in = (void *)id;
  52         if (!wine_server_call( req )) ret = reply->teb;
  53     }
  54     SERVER_END_REQ;
  55
  56     if (!ret)
  57     {
  58         /* Allow task handles to be used; convert to main thread */
  59         if ( IsTask16( id ) )
  60         {
  61             TDB *pTask = TASK_GetPtr( id );
  62             if (pTask) return pTask->teb;
  63         }
  64         SetLastError( ERROR_INVALID_PARAMETER );
  65     }
  66     return ret;
  67 }
  68
  69
  70 /***********************************************************************
  71  *           THREAD_InitTEB
  72  *
  73  * Initialization of a newly created TEB.
  74  */
  75 static BOOL THREAD_InitTEB( TEB *teb )
  76 {
  77     teb->except    = (void *)~0UL;
  78     teb->self      = teb;
  79     teb->tibflags  = TEBF_WIN32;
  80     teb->tls_ptr   = teb->tls_array;
  81     teb->exit_code = STILL_ACTIVE;
  82     teb->request_fd = -1;
  83     teb->reply_fd   = -1;
  84     teb->wait_fd[0] = -1;
  85     teb->wait_fd[1] = -1;
  86     teb->stack_top  = (void *)~0UL;
  87     teb->StaticUnicodeString.MaximumLength = sizeof(teb->StaticUnicodeBuffer);
  88     teb->StaticUnicodeString.Buffer = (PWSTR)teb->StaticUnicodeBuffer;
  89     teb->teb_sel = SELECTOR_AllocBlock( teb, 0x1000, WINE_LDT_FLAGS_DATA|WINE_LDT_FLAGS_32BIT );
  90     return (teb->teb_sel != 0);
  91 }
  92
  93
  94 /***********************************************************************
  95  *           THREAD_FreeTEB
  96  *
  97  * Free data structures associated with a thread.
  98  * Must be called from the context of another thread.
  99  */
 100 static void THREAD_FreeTEB( TEB *teb )
 101 {
 102     TRACE("(%p) called\n", teb );
 103     /* Free the associated memory */
 104     FreeSelector16( teb->stack_sel );
 105     FreeSelector16( teb->teb_sel );
 106     VirtualFree( teb->stack_base, 0, MEM_RELEASE );
 107 }
 108
 109
 110 /***********************************************************************
 111  *           THREAD_InitStack
 112  *
 113  * Allocate the stack of a thread.
 114  */
 115 TEB *THREAD_InitStack( TEB *teb, DWORD stack_size )
 116 {
 117     DWORD old_prot, total_size;
 118     DWORD page_size = getpagesize();
 119     void *base;
 120
 121     /* Allocate the stack */
 122
 123     if (stack_size >= 16*1024*1024)
 124         WARN("Thread stack size is %ld MB.\n",stack_size/1024/1024);
 125
 126     /* if size is smaller than default, get stack size from parent */
 127     if (stack_size < 1024 * 1024)
 128     {
 129         if (teb)
 130             stack_size = 1024 * 1024;  /* no parent */
 131         else
 132             stack_size = ((char *)NtCurrentTeb()->stack_top - (char *)NtCurrentTeb()->stack_base
 133                           - SIGNAL_STACK_SIZE - 3 * page_size);
 134     }
 135
 136     /* FIXME: some Wine functions use a lot of stack, so we add 64Kb here */
 137     stack_size += 64 * 1024;
 138
 139     /* Memory layout in allocated block:
 140      *
 141      *   size                 contents
 142      * 1 page              NOACCESS guard page
 143      * SIGNAL_STACK_SIZE   signal stack
 144      * 1 page              NOACCESS guard page
 145      * 1 page              PAGE_GUARD guard page
 146      * stack_size          normal stack
 147      * 64Kb                16-bit stack (optional)
 148      * 1 page              TEB (except for initial thread)
 149      * 1 page              debug info (except for initial thread)
 150      */
 151
 152     stack_size = (stack_size + (page_size - 1)) & ~(page_size - 1);
 153     total_size = stack_size + SIGNAL_STACK_SIZE + 3 * page_size;
 154     total_size += 0x10000; /* 16-bit stack */
 155     if (!teb) total_size += 2 * page_size;
 156
 157     if (!(base = VirtualAlloc( NULL, total_size, MEM_COMMIT, PAGE_EXECUTE_READWRITE )))
 158         return NULL;
 159
 160     if (!teb)
 161     {
 162         teb = (TEB *)((char *)base + total_size - 2 * page_size);
 163         if (!THREAD_InitTEB( teb )) goto error;
 164         teb->debug_info = (char *)teb + page_size;
 165     }
 166
 167     teb->stack_low    = base;
 168     teb->stack_base   = base;
 169     teb->signal_stack = (char *)base + page_size;
 170     teb->stack_top    = (char *)base + 3 * page_size + SIGNAL_STACK_SIZE + stack_size;
 171
 172     /* Setup guard pages */
 173
 174     VirtualProtect( base, 1, PAGE_NOACCESS, &old_prot );
 175     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE, 1, PAGE_NOACCESS, &old_prot );
 176     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE + page_size, 1,
 177                     PAGE_EXECUTE_READWRITE | PAGE_GUARD, &old_prot );
 178
 179     /* Allocate the 16-bit stack selector */
 180
 181     teb->stack_sel = SELECTOR_AllocBlock( teb->stack_top, 0x10000, WINE_LDT_FLAGS_DATA );
 182     if (!teb->stack_sel) goto error;
 183     teb->cur_stack = MAKESEGPTR( teb->stack_sel, 0x10000 - sizeof(STACK16FRAME) );
 184
 185     return teb;
 186
 187 error:
 188     FreeSelector16( teb->teb_sel );
 189     VirtualFree( base, 0, MEM_RELEASE );
 190     return NULL;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           thread_errno_location
 196  *
 197  * Get the per-thread errno location.
 198  */
 199 static int *thread_errno_location(void)
 200 {
 201     return &NtCurrentTeb()->thread_errno;
 202 }
 203
 204 /***********************************************************************
 205  *           thread_h_errno_location
 206  *
 207  * Get the per-thread h_errno location.
 208  */
 209 static int *thread_h_errno_location(void)
 210 {
 211     return &NtCurrentTeb()->thread_h_errno;
 212 }
 213
 214 /***********************************************************************
 215  *           THREAD_Init
 216  *
 217  * Setup the initial thread.
 218  *
 219  * NOTES: The first allocated TEB on NT is at 0x7ffde000.
 220  */
 221 void THREAD_Init(void)
 222 {
 223     if (!initial_teb.self)  /* do it only once */
 224     {
 225         THREAD_InitTEB( &initial_teb );
 226         assert( initial_teb.teb_sel );
 227         initial_teb.process = &current_process;
 228         SYSDEPS_SetCurThread( &initial_teb );
 229         wine_errno_location = thread_errno_location;
 230         wine_h_errno_location = thread_h_errno_location;
 231     }
 232 }
 233
 234 DECL_GLOBAL_CONSTRUCTOR(thread_init) { THREAD_Init(); }
 235
 236
 237 /***********************************************************************
 238  *           THREAD_Start
 239  *
 240  * Start execution of a newly created thread. Does not return.
 241  */
 242 static void THREAD_Start(void)
 243 {
 244     LPTHREAD_START_ROUTINE func = (LPTHREAD_START_ROUTINE)NtCurrentTeb()->entry_point;
 245
 246     if (TRACE_ON(relay))
 247         DPRINTF("%08lx:Starting thread (entryproc=%p)\n", GetCurrentThreadId(), func );
 248
 249     PROCESS_CallUserSignalProc( USIG_THREAD_INIT, 0 );
 250     PE_InitTls();
 251     MODULE_DllThreadAttach( NULL );
 252     ExitThread( func( NtCurrentTeb()->entry_arg ) );
 253 }
 254
 255
 256 /***********************************************************************
 257  *           CreateThread   (KERNEL32.@)
 258  */
 259 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, DWORD stack,
 260                             LPTHREAD_START_ROUTINE start, LPVOID param,
 261                             DWORD flags, LPDWORD id )
 262 {
 263     HANDLE handle = 0;
 264     TEB *teb;
 265     void *tid = 0;
 266     int request_pipe[2];
 267
 268     if (pipe( request_pipe ) == -1)
 269     {
 270         SetLastError( ERROR_TOO_MANY_OPEN_FILES );
 271         return 0;
 272     }
 273     fcntl( request_pipe[1], F_SETFD, 1 ); /* set close on exec flag */
 274     wine_server_send_fd( request_pipe[0] );
 275
 276     SERVER_START_REQ( new_thread )
 277     {
 278         req->suspend    = ((flags & CREATE_SUSPENDED) != 0);
 279         req->inherit    = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
 280         req->request_fd = request_pipe[0];
 281         if (!wine_server_call_err( req ))
 282         {
 283             handle = reply->handle;
 284             tid = reply->tid;
 285         }
 286         close( request_pipe[0] );
 287     }
 288     SERVER_END_REQ;
 289
 290     if (!handle || !(teb = THREAD_InitStack( NULL, stack )))
 291     {
 292         close( request_pipe[1] );
 293         return 0;
 294     }
 295
 296     teb->process     = NtCurrentTeb()->process;
 297     teb->tid         = tid;
 298     teb->request_fd  = request_pipe[1];
 299     teb->entry_point = start;
 300     teb->entry_arg   = param;
 301     teb->startup     = THREAD_Start;
 302     teb->htask16     = GetCurrentTask();
 303
 304     if (id) *id = (DWORD)tid;
 305     if (SYSDEPS_SpawnThread( teb ) == -1)
 306     {
 307         CloseHandle( handle );
 308         close( request_pipe[1] );
 309         THREAD_FreeTEB( teb );
 310         return 0;
 311     }
 312     return handle;
 313 }
 314
 315 /***********************************************************************
 316  *           CreateThread16   (KERNEL.441)
 317  */
 318 static DWORD CALLBACK THREAD_StartThread16( LPVOID threadArgs )
 319 {
 320     FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
 321     DWORD     param = ((DWORD *)threadArgs)[1];
 322     HeapFree( GetProcessHeap(), 0, threadArgs );
 323
 324     ((LPDWORD)CURRENT_STACK16)[-1] = param;
 325     return wine_call_to_16_long( start, sizeof(DWORD) );
 326 }
 327 HANDLE WINAPI CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 328                               FARPROC16 start, SEGPTR param,
 329                               DWORD flags, LPDWORD id )
 330 {
 331     DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
 332     if (!threadArgs) return INVALID_HANDLE_VALUE;
 333     threadArgs[0] = (DWORD)start;
 334     threadArgs[1] = (DWORD)param;
 335
 336     return CreateThread( sa, stack, THREAD_StartThread16, threadArgs, flags, id );
 337 }
 338
 339
 340 /***********************************************************************
 341  * ExitThread [KERNEL32.@]  Ends a thread
 342  *
 343  * RETURNS
 344  *    None
 345  */
 346 void WINAPI ExitThread( DWORD code ) /* [in] Exit code for this thread */
 347 {
 348     BOOL last;
 349     SERVER_START_REQ( terminate_thread )
 350     {
 351         /* send the exit code to the server */
 352         req->handle    = GetCurrentThread();
 353         req->exit_code = code;
 354         wine_server_call( req );
 355         last = reply->last;
 356     }
 357     SERVER_END_REQ;
 358
 359     if (last)
 360     {
 361         MODULE_DllProcessDetach( TRUE, (LPVOID)1 );
 362         exit( code );
 363     }
 364     else
 365     {
 366         MODULE_DllThreadDetach( NULL );
 367         if (!(NtCurrentTeb()->tibflags & TEBF_WIN32)) TASK_ExitTask();
 368         SYSDEPS_ExitThread( code );
 369     }
 370 }
 371
 372
 373 /***********************************************************************
 374  * SetThreadContext [KERNEL32.@]  Sets context of thread.
 375  *
 376  * RETURNS
 377  *    Success: TRUE
 378  *    Failure: FALSE
 379  */
 380 BOOL WINAPI SetThreadContext( HANDLE handle,           /* [in]  Handle to thread with context */
 381                               const CONTEXT *context ) /* [in] Address of context structure */
 382 {
 383     BOOL ret;
 384     SERVER_START_REQ( set_thread_context )
 385     {
 386         req->handle = handle;
 387         req->flags = context->ContextFlags;
 388         wine_server_add_data( req, context, sizeof(*context) );
 389         ret = !wine_server_call_err( req );
 390     }
 391     SERVER_END_REQ;
 392     return ret;
 393 }
 394
 395
 396 /***********************************************************************
 397  * GetThreadContext [KERNEL32.@]  Retrieves context of thread.
 398  *
 399  * RETURNS
 400  *    Success: TRUE
 401  *    Failure: FALSE
 402  */
 403 BOOL WINAPI GetThreadContext( HANDLE handle,     /* [in]  Handle to thread with context */
 404                               CONTEXT *context ) /* [out] Address of context structure */
 405 {
 406     BOOL ret;
 407     SERVER_START_REQ( get_thread_context )
 408     {
 409         req->handle = handle;
 410         req->flags = context->ContextFlags;
 411         wine_server_add_data( req, context, sizeof(*context) );
 412         wine_server_set_reply( req, context, sizeof(*context) );
 413         ret = !wine_server_call_err( req );
 414     }
 415     SERVER_END_REQ;
 416     return ret;
 417 }
 418
 419
 420 /**********************************************************************
 421  * GetThreadPriority [KERNEL32.@]  Returns priority for thread.
 422  *
 423  * RETURNS
 424  *    Success: Thread's priority level.
 425  *    Failure: THREAD_PRIORITY_ERROR_RETURN
 426  */
 427 INT WINAPI GetThreadPriority(
 428     HANDLE hthread) /* [in] Handle to thread */
 429 {
 430     INT ret = THREAD_PRIORITY_ERROR_RETURN;
 431     SERVER_START_REQ( get_thread_info )
 432     {
 433         req->handle = hthread;
 434         req->tid_in = 0;
 435         if (!wine_server_call_err( req )) ret = reply->priority;
 436     }
 437     SERVER_END_REQ;
 438     return ret;
 439 }
 440
 441
 442 /**********************************************************************
 443  * SetThreadPriority [KERNEL32.@]  Sets priority for thread.
 444  *
 445  * RETURNS
 446  *    Success: TRUE
 447  *    Failure: FALSE
 448  */
 449 BOOL WINAPI SetThreadPriority(
 450     HANDLE hthread, /* [in] Handle to thread */
 451     INT priority)   /* [in] Thread priority level */
 452 {
 453     BOOL ret;
 454     SERVER_START_REQ( set_thread_info )
 455     {
 456         req->handle   = hthread;
 457         req->priority = priority;
 458         req->mask     = SET_THREAD_INFO_PRIORITY;
 459         ret = !wine_server_call_err( req );
 460     }
 461     SERVER_END_REQ;
 462     return ret;
 463 }
 464
 465
 466 /**********************************************************************
 467  * GetThreadPriorityBoost [KERNEL32.@]  Returns priority boost for thread.
 468  *
 469  * Always reports that priority boost is disabled.
 470  *
 471  * RETURNS
 472  *    Success: TRUE.
 473  *    Failure: FALSE
 474  */
 475 BOOL WINAPI GetThreadPriorityBoost(
 476     HANDLE hthread, /* [in] Handle to thread */
 477     PBOOL pstate)   /* [out] pointer to var that receives the boost state */
 478 {
 479     if (pstate) *pstate = FALSE;
 480     return NO_ERROR;
 481 }
 482
 483
 484 /**********************************************************************
 485  * SetThreadPriorityBoost [KERNEL32.@]  Sets priority boost for thread.
 486  *
 487  * Priority boost is not implemented. Thsi function always returns
 488  * FALSE and sets last error to ERROR_CALL_NOT_IMPLEMENTED
 489  *
 490  * RETURNS
 491  *    Always returns FALSE to indicate a failure
 492  */
 493 BOOL WINAPI SetThreadPriorityBoost(
 494     HANDLE hthread, /* [in] Handle to thread */
 495     BOOL disable)   /* [in] TRUE to disable priority boost */
 496 {
 497     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 498     return FALSE;
 499 }
 500
 501
 502 /**********************************************************************
 503  *           SetThreadAffinityMask   (KERNEL32.@)
 504  */
 505 DWORD WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD dwThreadAffinityMask )
 506 {
 507     DWORD ret;
 508     SERVER_START_REQ( set_thread_info )
 509     {
 510         req->handle   = hThread;
 511         req->affinity = dwThreadAffinityMask;
 512         req->mask     = SET_THREAD_INFO_AFFINITY;
 513         ret = !wine_server_call_err( req );
 514         /* FIXME: should return previous value */
 515     }
 516     SERVER_END_REQ;
 517     return ret;
 518 }
 519
 520
 521 /**********************************************************************
 522  * TerminateThread [KERNEL32.@]  Terminates a thread
 523  *
 524  * RETURNS
 525  *    Success: TRUE
 526  *    Failure: FALSE
 527  */
 528 BOOL WINAPI TerminateThread( HANDLE handle,    /* [in] Handle to thread */
 529                              DWORD exit_code)  /* [in] Exit code for thread */
 530 {
 531     NTSTATUS status = NtTerminateThread( handle, exit_code );
 532     if (status) SetLastError( RtlNtStatusToDosError(status) );
 533     return !status;
 534 }
 535
 536
 537 /**********************************************************************
 538  *              GetExitCodeThread (KERNEL32.@)
 539  *
 540  * Gets termination status of thread.
 541  *
 542  * RETURNS
 543  *    Success: TRUE
 544  *    Failure: FALSE
 545  */
 546 BOOL WINAPI GetExitCodeThread(
 547     HANDLE hthread, /* [in]  Handle to thread */
 548     LPDWORD exitcode) /* [out] Address to receive termination status */
 549 {
 550     BOOL ret;
 551     SERVER_START_REQ( get_thread_info )
 552     {
 553         req->handle = hthread;
 554         req->tid_in = 0;
 555         ret = !wine_server_call_err( req );
 556         if (ret && exitcode) *exitcode = reply->exit_code;
 557     }
 558     SERVER_END_REQ;
 559     return ret;
 560 }
 561
 562
 563 /**********************************************************************
 564  * ResumeThread [KERNEL32.@]  Resumes a thread.
 565  *
 566  * Decrements a thread's suspend count.  When count is zero, the
 567  * execution of the thread is resumed.
 568  *
 569  * RETURNS
 570  *    Success: Previous suspend count
 571  *    Failure: 0xFFFFFFFF
 572  *    Already running: 0
 573  */
 574 DWORD WINAPI ResumeThread(
 575     HANDLE hthread) /* [in] Identifies thread to restart */
 576 {
 577     DWORD ret = 0xffffffff;
 578     SERVER_START_REQ( resume_thread )
 579     {
 580         req->handle = hthread;
 581         if (!wine_server_call_err( req )) ret = reply->count;
 582     }
 583     SERVER_END_REQ;
 584     return ret;
 585 }
 586
 587
 588 /**********************************************************************
 589  * SuspendThread [KERNEL32.@]  Suspends a thread.
 590  *
 591  * RETURNS
 592  *    Success: Previous suspend count
 593  *    Failure: 0xFFFFFFFF
 594  */
 595 DWORD WINAPI SuspendThread(
 596     HANDLE hthread) /* [in] Handle to the thread */
 597 {
 598     DWORD ret = 0xffffffff;
 599     SERVER_START_REQ( suspend_thread )
 600     {
 601         req->handle = hthread;
 602         if (!wine_server_call_err( req )) ret = reply->count;
 603     }
 604     SERVER_END_REQ;
 605     return ret;
 606 }
 607
 608
 609 /***********************************************************************
 610  *              QueueUserAPC  (KERNEL32.@)
 611  */
 612 DWORD WINAPI QueueUserAPC( PAPCFUNC func, HANDLE hthread, ULONG_PTR data )
 613 {
 614     DWORD ret;
 615     SERVER_START_REQ( queue_apc )
 616     {
 617         req->handle = hthread;
 618         req->user   = 1;
 619         req->func   = func;
 620         req->param  = (void *)data;
 621         ret = !wine_server_call_err( req );
 622     }
 623     SERVER_END_REQ;
 624     return ret;
 625 }
 626
 627
 628 /**********************************************************************
 629  * GetThreadTimes [KERNEL32.@]  Obtains timing information.
 630  *
 631  * NOTES
 632  *    What are the fields where these values are stored?
 633  *
 634  * RETURNS
 635  *    Success: TRUE
 636  *    Failure: FALSE
 637  */
 638 BOOL WINAPI GetThreadTimes(
 639     HANDLE thread,         /* [in]  Specifies the thread of interest */
 640     LPFILETIME creationtime, /* [out] When the thread was created */
 641     LPFILETIME exittime,     /* [out] When the thread was destroyed */
 642     LPFILETIME kerneltime,   /* [out] Time thread spent in kernel mode */
 643     LPFILETIME usertime)     /* [out] Time thread spent in user mode */
 644 {
 645     FIXME("(0x%08x): stub\n",thread);
 646     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 647     return FALSE;
 648 }
 649
 650
 651 /**********************************************************************
 652  * VWin32_BoostThreadGroup [KERNEL.535]
 653  */
 654 VOID WINAPI VWin32_BoostThreadGroup( DWORD threadId, INT boost )
 655 {
 656     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 657 }
 658
 659 /**********************************************************************
 660  * VWin32_BoostThreadStatic [KERNEL.536]
 661  */
 662 VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
 663 {
 664     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 665 }
 666
 667
 668 /***********************************************************************
 669  *           GetThreadLocale    (KERNEL32.@)
 670  */
 671 LCID WINAPI GetThreadLocale(void)
 672 {
 673     LCID ret = NtCurrentTeb()->CurrentLocale;
 674     if (!ret) NtCurrentTeb()->CurrentLocale = ret = GetUserDefaultLCID();
 675     return ret;
 676 }
 677
 678
 679 /**********************************************************************
 680  * SetThreadLocale [KERNEL32.@]  Sets the calling threads current locale.
 681  *
 682  * RETURNS
 683  *    Success: TRUE
 684  *    Failure: FALSE
 685  *
 686  * FIXME
 687  *  check if lcid is a valid cp
 688  */
 689 BOOL WINAPI SetThreadLocale(
 690     LCID lcid)     /* [in] Locale identifier */
 691 {
 692     switch (lcid)
 693     {
 694       case LOCALE_SYSTEM_DEFAULT:
 695         lcid = GetSystemDefaultLCID();
 696         break;
 697       case LOCALE_USER_DEFAULT:
 698       case LOCALE_NEUTRAL:
 699         lcid = GetUserDefaultLCID();
 700         break;
 701     }
 702     NtCurrentTeb()->CurrentLocale = lcid;
 703     return TRUE;
 704 }
 705
 706
 707 /***********************************************************************
 708  * GetCurrentThread [KERNEL32.@]  Gets pseudohandle for current thread
 709  *
 710  * RETURNS
 711  *    Pseudohandle for the current thread
 712  */
 713 #undef GetCurrentThread
 714 HANDLE WINAPI GetCurrentThread(void)
 715 {
 716     return 0xfffffffe;
 717 }
 718
 719
 720 /***********************************************************************
 721  * ProcessIdToSessionId   (KERNEL32.@)
 722  * This function is available on Terminal Server 4SP4 and Windows 2000
 723  */
 724 BOOL WINAPI ProcessIdToSessionId( DWORD procid, DWORD *sessionid_ptr )
 725 {
 726         /* According to MSDN, if the calling process is not in a terminal
 727          * services environment, then the sessionid returned is zero.
 728          */
 729         *sessionid_ptr = 0;
 730         return TRUE;
 731 }
 732
 733 /***********************************************************************
 734  * SetThreadExecutionState (KERNEL32.@)
 735  *
 736  * Informs the system that activity is taking place for
 737  * power management purposes.
 738  */
 739 EXECUTION_STATE WINAPI SetThreadExecutionState(EXECUTION_STATE flags)
 740 {
 741     static EXECUTION_STATE current =
 742             ES_SYSTEM_REQUIRED|ES_DISPLAY_REQUIRED|ES_USER_PRESENT;
 743     EXECUTION_STATE old = current;
 744
 745     if (!(current & ES_CONTINUOUS) || (flags & ES_CONTINUOUS))
 746         current = flags;
 747     FIXME("(0x%lx): stub, harmless (power management).\n", flags);
 748     return old;
 749 }
 750
 751
 752 #ifdef __i386__
 753
 754 /***********************************************************************
 755  *              SetLastError (KERNEL.147)
 756  *              SetLastError (KERNEL32.@)
 757  */
 758 /* void WINAPI SetLastError( DWORD error ); */
 759 __ASM_GLOBAL_FUNC( SetLastError,
 760                    "movl 4(%esp),%eax\n\t"
 761                    ".byte 0x64\n\t"
 762                    "movl %eax,0x60\n\t"
 763                    "ret $4" );
 764
 765 /***********************************************************************
 766  *              GetLastError (KERNEL.148)
 767  *              GetLastError (KERNEL32.@)
 768  */
 769 /* DWORD WINAPI GetLastError(void); */
 770 __ASM_GLOBAL_FUNC( GetLastError, ".byte 0x64\n\tmovl 0x60,%eax\n\tret" );
 771
 772 /***********************************************************************
 773  *              GetCurrentProcessId (KERNEL.471)
 774  *              GetCurrentProcessId (KERNEL32.@)
 775  */
 776 /* DWORD WINAPI GetCurrentProcessId(void) */
 777 __ASM_GLOBAL_FUNC( GetCurrentProcessId, ".byte 0x64\n\tmovl 0x20,%eax\n\tret" );
 778
 779 /***********************************************************************
 780  *              GetCurrentThreadId (KERNEL.462)
 781  *              GetCurrentThreadId (KERNEL32.@)
 782  */
 783 /* DWORD WINAPI GetCurrentThreadId(void) */
 784 __ASM_GLOBAL_FUNC( GetCurrentThreadId, ".byte 0x64\n\tmovl 0x24,%eax\n\tret" );
 785
 786 #else  /* __i386__ */
 787
 788 /**********************************************************************
 789  *              SetLastError (KERNEL.147)
 790  *              SetLastError (KERNEL32.@)
 791  *
 792  * Sets the last-error code.
 793  */
 794 void WINAPI SetLastError( DWORD error ) /* [in] Per-thread error code */
 795 {
 796     NtCurrentTeb()->last_error = error;
 797 }
 798
 799 /**********************************************************************
 800  *              GetLastError (KERNEL.148)
 801  *              GetLastError (KERNEL32.@)
 802  *
 803  * Returns last-error code.
 804  */
 805 DWORD WINAPI GetLastError(void)
 806 {
 807     return NtCurrentTeb()->last_error;
 808 }
 809
 810 /***********************************************************************
 811  *              GetCurrentProcessId (KERNEL.471)
 812  *              GetCurrentProcessId (KERNEL32.@)
 813  *
 814  * Returns process identifier.
 815  */
 816 DWORD WINAPI GetCurrentProcessId(void)
 817 {
 818     return (DWORD)NtCurrentTeb()->pid;
 819 }
 820
 821 /***********************************************************************
 822  *              GetCurrentThreadId (KERNEL.462)
 823  *              GetCurrentThreadId (KERNEL32.@)
 824  *
 825  * Returns thread identifier.
 826  */
 827 DWORD WINAPI GetCurrentThreadId(void)
 828 {
 829     return (DWORD)NtCurrentTeb()->tid;
 830 }
 831
 832 #endif  /* __i386__ */