scheduler/thread.c

   1 /*
   2  * Win32 threads
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <fcntl.h>
   9 #include <sys/types.h>
  10 #include <sys/socket.h>
  11 #ifdef HAVE_SYS_MMAN_H
  12 #include <sys/mman.h>
  13 #endif
  14 #include <unistd.h>
  15 #include "wine/winbase16.h"
  16 #include "thread.h"
  17 #include "process.h"
  18 #include "task.h"
  19 #include "module.h"
  20 #include "user.h"
  21 #include "winerror.h"
  22 #include "heap.h"
  23 #include "selectors.h"
  24 #include "winnt.h"
  25 #include "server.h"
  26 #include "services.h"
  27 #include "stackframe.h"
  28 #include "debugtools.h"
  29 #include "queue.h"
  30 #include "hook.h"
  31
  32 DEFAULT_DEBUG_CHANNEL(thread)
  33
  34 /* TEB of the initial thread */
  35 static TEB initial_teb;
  36
  37 /* Global thread list (FIXME: not thread-safe) */
  38 TEB *THREAD_First = &initial_teb;
  39
  40 /***********************************************************************
  41  *           THREAD_IsWin16
  42  */
  43 BOOL THREAD_IsWin16( TEB *teb )
  44 {
  45     return !teb || !(teb->flags & TEBF_WIN32);
  46 }
  47
  48 /***********************************************************************
  49  *           THREAD_IdToTEB
  50  *
  51  * Convert a thread id to a TEB, making sure it is valid.
  52  */
  53 TEB *THREAD_IdToTEB( DWORD id )
  54 {
  55     TEB *teb = THREAD_First;
  56
  57     if (!id) return NtCurrentTeb();
  58     while (teb)
  59     {
  60         if ((DWORD)teb->tid == id) return teb;
  61         teb = teb->next;
  62     }
  63     /* Allow task handles to be used; convert to main thread */
  64     if ( IsTask16( id ) )
  65     {
  66         TDB *pTask = (TDB *)GlobalLock16( id );
  67         if (pTask) return pTask->teb;
  68     }
  69     SetLastError( ERROR_INVALID_PARAMETER );
  70     return NULL;
  71 }
  72
  73
  74 /***********************************************************************
  75  *           THREAD_InitTEB
  76  *
  77  * Initialization of a newly created TEB.
  78  */
  79 static BOOL THREAD_InitTEB( TEB *teb, DWORD stack_size, BOOL alloc_stack16,
  80                             LPSECURITY_ATTRIBUTES sa )
  81 {
  82     DWORD old_prot;
  83
  84     /* Allocate the stack */
  85
  86     /* FIXME:
  87      * If stacksize smaller than 1 MB, allocate 1MB
  88      * (one program wanted only 10 kB, which is recommendable, but some WINE
  89      *  functions, noteably in the files subdir, push HUGE structures and
  90      *  arrays on the stack. They probably shouldn't.)
  91      * If stacksize larger than 16 MB, warn the user. (We could shrink the stack
  92      * but this could give more or less unexplainable crashes.)
  93      */
  94     if (stack_size<1024*1024)
  95         stack_size = 1024 * 1024;
  96     if (stack_size >= 16*1024*1024)
  97         WARN("Thread stack size is %ld MB.\n",stack_size/1024/1024);
  98     teb->stack_base = VirtualAlloc(NULL, stack_size + SIGNAL_STACK_SIZE +
  99                                    (alloc_stack16 ? 0x10000 : 0),
 100                                    MEM_COMMIT, PAGE_EXECUTE_READWRITE );
 101     if (!teb->stack_base) goto error;
 102     /* Set a guard page at the bottom of the stack */
 103     VirtualProtect( teb->stack_base, 1, PAGE_EXECUTE_READWRITE | PAGE_GUARD, &old_prot );
 104     teb->stack_top    = (char *)teb->stack_base + stack_size;
 105     teb->stack_low    = teb->stack_base;
 106     teb->signal_stack = teb->stack_top;  /* start of signal stack */
 107
 108     /* Allocate the 16-bit stack selector */
 109
 110     if (alloc_stack16)
 111     {
 112         teb->stack_sel = SELECTOR_AllocBlock( teb->stack_top, 0x10000, SEGMENT_DATA,
 113                                               FALSE, FALSE );
 114         if (!teb->stack_sel) goto error;
 115         teb->cur_stack = PTR_SEG_OFF_TO_SEGPTR( teb->stack_sel,
 116                                                 0x10000 - sizeof(STACK16FRAME) );
 117         teb->signal_stack = (char *)teb->signal_stack + 0x10000;
 118     }
 119
 120     /* Create the thread event */
 121
 122     if (!(teb->event = CreateEventA( NULL, FALSE, FALSE, NULL ))) goto error;
 123     teb->event = ConvertToGlobalHandle( teb->event );
 124     return TRUE;
 125
 126 error:
 127     if (teb->event) CloseHandle( teb->event );
 128     if (teb->stack_sel) SELECTOR_FreeBlock( teb->stack_sel, 1 );
 129     if (teb->stack_base) VirtualFree( teb->stack_base, 0, MEM_RELEASE );
 130     return FALSE;
 131 }
 132
 133
 134 /***********************************************************************
 135  *           THREAD_FreeTEB
 136  *
 137  * Free data structures associated with a thread.
 138  * Must be called from the context of another thread.
 139  */
 140 void CALLBACK THREAD_FreeTEB( ULONG_PTR arg )
 141 {
 142     TEB *teb = (TEB *)arg;
 143     TEB **pptr = &THREAD_First;
 144
 145     TRACE("(%p) called\n", teb );
 146     SERVICE_Delete( teb->cleanup );
 147
 148     PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
 149
 150     CloseHandle( teb->event );
 151     while (*pptr && (*pptr != teb)) pptr = &(*pptr)->next;
 152     if (*pptr) *pptr = teb->next;
 153
 154     /* Free the associated memory */
 155
 156     if (teb->stack_sel) SELECTOR_FreeBlock( teb->stack_sel, 1 );
 157     SELECTOR_FreeBlock( teb->teb_sel, 1 );
 158     close( teb->socket );
 159     if (teb->buffer) munmap( teb->buffer, teb->buffer_size );
 160     VirtualFree( teb->stack_base, 0, MEM_RELEASE );
 161     HeapFree( SystemHeap, 0, teb );
 162 }
 163
 164
 165 /***********************************************************************
 166  *           THREAD_CreateInitialThread
 167  *
 168  * Create the initial thread.
 169  */
 170 TEB *THREAD_CreateInitialThread( PDB *pdb, int server_fd )
 171 {
 172     initial_teb.except      = (void *)-1;
 173     initial_teb.self        = &initial_teb;
 174     initial_teb.flags       = /* TEBF_WIN32 */ 0;
 175     initial_teb.tls_ptr     = initial_teb.tls_array;
 176     initial_teb.process     = pdb;
 177     initial_teb.exit_code   = 0x103; /* STILL_ACTIVE */
 178     initial_teb.socket      = server_fd;
 179
 180     /* Allocate the TEB selector (%fs register) */
 181
 182     if (!(initial_teb.teb_sel = SELECTOR_AllocBlock( &initial_teb, 0x1000,
 183                                                      SEGMENT_DATA, TRUE, FALSE )))
 184     {
 185         MESSAGE("Could not allocate fs register for initial thread\n" );
 186         return NULL;
 187     }
 188     SYSDEPS_SetCurThread( &initial_teb );
 189
 190     /* Now proceed with normal initialization */
 191
 192     if (CLIENT_InitThread()) return NULL;
 193     if (!THREAD_InitTEB( &initial_teb, 0, TRUE, NULL )) return NULL;
 194     return &initial_teb;
 195 }
 196
 197
 198 /***********************************************************************
 199  *           THREAD_Create
 200  */
 201 TEB *THREAD_Create( PDB *pdb, DWORD flags, DWORD stack_size, BOOL alloc_stack16,
 202                      LPSECURITY_ATTRIBUTES sa, int *server_handle )
 203 {
 204     struct new_thread_request *req = get_req_buffer();
 205     int fd[2];
 206     HANDLE cleanup_object;
 207
 208     TEB *teb = HeapAlloc( SystemHeap, HEAP_ZERO_MEMORY, sizeof(TEB) );
 209     if (!teb) return NULL;
 210     teb->except      = (void *)-1;
 211     teb->htask16     = pdb->task;
 212     teb->self        = teb;
 213     teb->flags       = (pdb->flags & PDB32_WIN16_PROC)? 0 : TEBF_WIN32;
 214     teb->tls_ptr     = teb->tls_array;
 215     teb->process     = pdb;
 216     teb->exit_code   = 0x103; /* STILL_ACTIVE */
 217     teb->socket      = -1;
 218
 219     /* Allocate the TEB selector (%fs register) */
 220
 221     *server_handle = -1;
 222     teb->teb_sel = SELECTOR_AllocBlock( teb, 0x1000, SEGMENT_DATA, TRUE, FALSE );
 223     if (!teb->teb_sel) goto error;
 224
 225     /* Create the socket pair for server communication */
 226
 227     if (socketpair( AF_UNIX, SOCK_STREAM, 0, fd ) == -1)
 228     {
 229         SetLastError( ERROR_TOO_MANY_OPEN_FILES );  /* FIXME */
 230         goto error;
 231     }
 232     teb->socket = fd[0];
 233     fcntl( fd[0], F_SETFD, 1 ); /* set close on exec flag */
 234
 235     /* Create the thread on the server side */
 236
 237     req->pid     = teb->process->server_pid;
 238     req->suspend = ((flags & CREATE_SUSPENDED) != 0);
 239     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
 240     if (server_call_fd( REQ_NEW_THREAD, fd[1], NULL )) goto error;
 241     teb->tid = req->tid;
 242     *server_handle = req->handle;
 243
 244     /* Do the rest of the initialization */
 245
 246     if (!THREAD_InitTEB( teb, stack_size, alloc_stack16, sa )) goto error;
 247     teb->next = THREAD_First;
 248     THREAD_First = teb;
 249
 250     /* Install cleanup handler */
 251     if ( !DuplicateHandle( GetCurrentProcess(), *server_handle,
 252                            GetCurrentProcess(), &cleanup_object,
 253                            0, FALSE, DUPLICATE_SAME_ACCESS ) ) goto error;
 254     teb->cleanup = SERVICE_AddObject( cleanup_object, THREAD_FreeTEB, (ULONG_PTR)teb );
 255
 256     return teb;
 257
 258 error:
 259     if (*server_handle != -1) CloseHandle( *server_handle );
 260     if (teb->teb_sel) SELECTOR_FreeBlock( teb->teb_sel, 1 );
 261     if (teb->socket != -1) close( teb->socket );
 262     HeapFree( SystemHeap, 0, teb );
 263     return NULL;
 264 }
 265
 266
 267 /***********************************************************************
 268  *           THREAD_Start
 269  *
 270  * Start execution of a newly created thread. Does not return.
 271  */
 272 static void THREAD_Start(void)
 273 {
 274     LPTHREAD_START_ROUTINE func = (LPTHREAD_START_ROUTINE)NtCurrentTeb()->entry_point;
 275     PROCESS_CallUserSignalProc( USIG_THREAD_INIT, 0 );
 276     PE_InitTls();
 277     MODULE_DllThreadAttach( NULL );
 278
 279     if (NtCurrentTeb()->process->flags & PDB32_DEBUGGED) DEBUG_SendCreateThreadEvent( func );
 280
 281     ExitThread( func( NtCurrentTeb()->entry_arg ) );
 282 }
 283
 284
 285 /***********************************************************************
 286  *           CreateThread   (KERNEL32.63)
 287  */
 288 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, DWORD stack,
 289                             LPTHREAD_START_ROUTINE start, LPVOID param,
 290                             DWORD flags, LPDWORD id )
 291 {
 292     int handle = -1;
 293     TEB *teb = THREAD_Create( PROCESS_Current(), flags, stack, TRUE, sa, &handle );
 294     if (!teb) return 0;
 295     teb->flags      |= TEBF_WIN32;
 296     teb->entry_point = start;
 297     teb->entry_arg   = param;
 298     teb->startup     = THREAD_Start;
 299     if (SYSDEPS_SpawnThread( teb ) == -1)
 300     {
 301         CloseHandle( handle );
 302         return 0;
 303     }
 304     if (id) *id = (DWORD)teb->tid;
 305     return handle;
 306 }
 307
 308
 309 /***********************************************************************
 310  * ExitThread [KERNEL32.215]  Ends a thread
 311  *
 312  * RETURNS
 313  *    None
 314  */
 315 void WINAPI ExitThread( DWORD code ) /* [in] Exit code for this thread */
 316 {
 317     MODULE_DllThreadDetach( NULL );
 318     TerminateThread( GetCurrentThread(), code );
 319 }
 320
 321
 322 /***********************************************************************
 323  * GetCurrentThread [KERNEL32.200]  Gets pseudohandle for current thread
 324  *
 325  * RETURNS
 326  *    Pseudohandle for the current thread
 327  */
 328 HANDLE WINAPI GetCurrentThread(void)
 329 {
 330     return CURRENT_THREAD_PSEUDOHANDLE;
 331 }
 332
 333
 334 /**********************************************************************
 335  * GetLastError [KERNEL.148] [KERNEL32.227]  Returns last-error code.
 336  *
 337  * RETURNS
 338  *     Calling thread's last error code value.
 339  */
 340 DWORD WINAPI GetLastError(void)
 341 {
 342     return NtCurrentTeb()->last_error;
 343 }
 344
 345
 346 /**********************************************************************
 347  * SetLastErrorEx [USER32.485]  Sets the last-error code.
 348  *
 349  * RETURNS
 350  *    None.
 351  */
 352 void WINAPI SetLastErrorEx(
 353     DWORD error, /* [in] Per-thread error code */
 354     DWORD type)  /* [in] Error type */
 355 {
 356     TRACE("(0x%08lx, 0x%08lx)\n", error,type);
 357     switch(type) {
 358         case 0:
 359             break;
 360         case SLE_ERROR:
 361         case SLE_MINORERROR:
 362         case SLE_WARNING:
 363             /* Fall through for now */
 364         default:
 365             FIXME("(error=%08lx, type=%08lx): Unhandled type\n", error,type);
 366             break;
 367     }
 368     SetLastError( error );
 369 }
 370
 371
 372 /**********************************************************************
 373  * TlsAlloc [KERNEL32.530]  Allocates a TLS index.
 374  *
 375  * Allocates a thread local storage index
 376  *
 377  * RETURNS
 378  *    Success: TLS Index
 379  *    Failure: 0xFFFFFFFF
 380  */
 381 DWORD WINAPI TlsAlloc( void )
 382 {
 383     PDB *process = PROCESS_Current();
 384     DWORD i, mask, ret = 0;
 385     DWORD *bits = process->tls_bits;
 386     EnterCriticalSection( &process->crit_section );
 387     if (*bits == 0xffffffff)
 388     {
 389         bits++;
 390         ret = 32;
 391         if (*bits == 0xffffffff)
 392         {
 393             LeaveCriticalSection( &process->crit_section );
 394             SetLastError( ERROR_NO_MORE_ITEMS );
 395             return 0xffffffff;
 396         }
 397     }
 398     for (i = 0, mask = 1; i < 32; i++, mask <<= 1) if (!(*bits & mask)) break;
 399     *bits |= mask;
 400     LeaveCriticalSection( &process->crit_section );
 401     return ret + i;
 402 }
 403
 404
 405 /**********************************************************************
 406  * TlsFree [KERNEL32.531]  Releases a TLS index.
 407  *
 408  * Releases a thread local storage index, making it available for reuse
 409  *
 410  * RETURNS
 411  *    Success: TRUE
 412  *    Failure: FALSE
 413  */
 414 BOOL WINAPI TlsFree(
 415     DWORD index) /* [in] TLS Index to free */
 416 {
 417     PDB *process = PROCESS_Current();
 418     DWORD mask;
 419     DWORD *bits = process->tls_bits;
 420     if (index >= 64)
 421     {
 422         SetLastError( ERROR_INVALID_PARAMETER );
 423         return FALSE;
 424     }
 425     EnterCriticalSection( &process->crit_section );
 426     if (index >= 32) bits++;
 427     mask = (1 << (index & 31));
 428     if (!(*bits & mask))  /* already free? */
 429     {
 430         LeaveCriticalSection( &process->crit_section );
 431         SetLastError( ERROR_INVALID_PARAMETER );
 432         return FALSE;
 433     }
 434     *bits &= ~mask;
 435     NtCurrentTeb()->tls_array[index] = 0;
 436     /* FIXME: should zero all other thread values */
 437     LeaveCriticalSection( &process->crit_section );
 438     return TRUE;
 439 }
 440
 441
 442 /**********************************************************************
 443  * TlsGetValue [KERNEL32.532]  Gets value in a thread's TLS slot
 444  *
 445  * RETURNS
 446  *    Success: Value stored in calling thread's TLS slot for index
 447  *    Failure: 0 and GetLastError returns NO_ERROR
 448  */
 449 LPVOID WINAPI TlsGetValue(
 450     DWORD index) /* [in] TLS index to retrieve value for */
 451 {
 452     if (index >= 64)
 453     {
 454         SetLastError( ERROR_INVALID_PARAMETER );
 455         return NULL;
 456     }
 457     SetLastError( ERROR_SUCCESS );
 458     return NtCurrentTeb()->tls_array[index];
 459 }
 460
 461
 462 /**********************************************************************
 463  * TlsSetValue [KERNEL32.533]  Stores a value in the thread's TLS slot.
 464  *
 465  * RETURNS
 466  *    Success: TRUE
 467  *    Failure: FALSE
 468  */
 469 BOOL WINAPI TlsSetValue(
 470     DWORD index,  /* [in] TLS index to set value for */
 471     LPVOID value) /* [in] Value to be stored */
 472 {
 473     if (index >= 64)
 474     {
 475         SetLastError( ERROR_INVALID_PARAMETER );
 476         return FALSE;
 477     }
 478     NtCurrentTeb()->tls_array[index] = value;
 479     return TRUE;
 480 }
 481
 482
 483 /***********************************************************************
 484  * SetThreadContext [KERNEL32.670]  Sets context of thread.
 485  *
 486  * RETURNS
 487  *    Success: TRUE
 488  *    Failure: FALSE
 489  */
 490 BOOL WINAPI SetThreadContext(
 491     HANDLE handle,  /* [in]  Handle to thread with context */
 492     CONTEXT *context) /* [out] Address of context structure */
 493 {
 494     FIXME("not implemented\n" );
 495     return TRUE;
 496 }
 497
 498 /***********************************************************************
 499  * GetThreadContext [KERNEL32.294]  Retrieves context of thread.
 500  *
 501  * RETURNS
 502  *    Success: TRUE
 503  *    Failure: FALSE
 504  */
 505 BOOL WINAPI GetThreadContext(
 506     HANDLE handle,  /* [in]  Handle to thread with context */
 507     CONTEXT *context) /* [out] Address of context structure */
 508 {
 509 #ifdef __i386__
 510     WORD cs, ds;
 511
 512     FIXME("returning dummy info\n" );
 513
 514     /* make up some plausible values for segment registers */
 515     GET_CS(cs);
 516     GET_DS(ds);
 517     context->SegCs   = cs;
 518     context->SegDs   = ds;
 519     context->SegEs   = ds;
 520     context->SegGs   = ds;
 521     context->SegSs   = ds;
 522     context->SegFs   = ds;
 523 #endif
 524     return TRUE;
 525 }
 526
 527
 528 /**********************************************************************
 529  * GetThreadPriority [KERNEL32.296]  Returns priority for thread.
 530  *
 531  * RETURNS
 532  *    Success: Thread's priority level.
 533  *    Failure: THREAD_PRIORITY_ERROR_RETURN
 534  */
 535 INT WINAPI GetThreadPriority(
 536     HANDLE hthread) /* [in] Handle to thread */
 537 {
 538     INT ret = THREAD_PRIORITY_ERROR_RETURN;
 539     struct get_thread_info_request *req = get_req_buffer();
 540     req->handle = hthread;
 541     if (!server_call( REQ_GET_THREAD_INFO )) ret = req->priority;
 542     return ret;
 543 }
 544
 545
 546 /**********************************************************************
 547  * SetThreadPriority [KERNEL32.514]  Sets priority for thread.
 548  *
 549  * RETURNS
 550  *    Success: TRUE
 551  *    Failure: FALSE
 552  */
 553 BOOL WINAPI SetThreadPriority(
 554     HANDLE hthread, /* [in] Handle to thread */
 555     INT priority)   /* [in] Thread priority level */
 556 {
 557     struct set_thread_info_request *req = get_req_buffer();
 558     req->handle   = hthread;
 559     req->priority = priority;
 560     req->mask     = SET_THREAD_INFO_PRIORITY;
 561     return !server_call( REQ_SET_THREAD_INFO );
 562 }
 563
 564
 565 /**********************************************************************
 566  *           SetThreadAffinityMask   (KERNEL32.669)
 567  */
 568 DWORD WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD dwThreadAffinityMask )
 569 {
 570     struct set_thread_info_request *req = get_req_buffer();
 571     req->handle   = hThread;
 572     req->affinity = dwThreadAffinityMask;
 573     req->mask     = SET_THREAD_INFO_AFFINITY;
 574     if (server_call( REQ_SET_THREAD_INFO )) return 0;
 575     return 1;  /* FIXME: should return previous value */
 576 }
 577
 578
 579 /**********************************************************************
 580  * TerminateThread [KERNEL32.685]  Terminates a thread
 581  *
 582  * RETURNS
 583  *    Success: TRUE
 584  *    Failure: FALSE
 585  */
 586 BOOL WINAPI TerminateThread(
 587     HANDLE handle, /* [in] Handle to thread */
 588     DWORD exitcode)  /* [in] Exit code for thread */
 589 {
 590     struct terminate_thread_request *req = get_req_buffer();
 591     req->handle    = handle;
 592     req->exit_code = exitcode;
 593     return !server_call( REQ_TERMINATE_THREAD );
 594 }
 595
 596
 597 /**********************************************************************
 598  * GetExitCodeThread [KERNEL32.???]  Gets termination status of thread.
 599  *
 600  * RETURNS
 601  *    Success: TRUE
 602  *    Failure: FALSE
 603  */
 604 BOOL WINAPI GetExitCodeThread(
 605     HANDLE hthread, /* [in]  Handle to thread */
 606     LPDWORD exitcode) /* [out] Address to receive termination status */
 607 {
 608     BOOL ret = FALSE;
 609     struct get_thread_info_request *req = get_req_buffer();
 610     req->handle = hthread;
 611     if (!server_call( REQ_GET_THREAD_INFO ))
 612     {
 613         if (exitcode) *exitcode = req->exit_code;
 614         ret = TRUE;
 615     }
 616     return ret;
 617 }
 618
 619
 620 /**********************************************************************
 621  * ResumeThread [KERNEL32.587]  Resumes a thread.
 622  *
 623  * Decrements a thread's suspend count.  When count is zero, the
 624  * execution of the thread is resumed.
 625  *
 626  * RETURNS
 627  *    Success: Previous suspend count
 628  *    Failure: 0xFFFFFFFF
 629  *    Already running: 0
 630  */
 631 DWORD WINAPI ResumeThread(
 632     HANDLE hthread) /* [in] Identifies thread to restart */
 633 {
 634     DWORD ret = 0xffffffff;
 635     struct resume_thread_request *req = get_req_buffer();
 636     req->handle = hthread;
 637     if (!server_call( REQ_RESUME_THREAD )) ret = req->count;
 638     return ret;
 639 }
 640
 641
 642 /**********************************************************************
 643  * SuspendThread [KERNEL32.681]  Suspends a thread.
 644  *
 645  * RETURNS
 646  *    Success: Previous suspend count
 647  *    Failure: 0xFFFFFFFF
 648  */
 649 DWORD WINAPI SuspendThread(
 650     HANDLE hthread) /* [in] Handle to the thread */
 651 {
 652     DWORD ret = 0xffffffff;
 653     struct suspend_thread_request *req = get_req_buffer();
 654     req->handle = hthread;
 655     if (!server_call( REQ_SUSPEND_THREAD )) ret = req->count;
 656     return ret;
 657 }
 658
 659
 660 /***********************************************************************
 661  *              QueueUserAPC  (KERNEL32.566)
 662  */
 663 DWORD WINAPI QueueUserAPC( PAPCFUNC func, HANDLE hthread, ULONG_PTR data )
 664 {
 665     struct queue_apc_request *req = get_req_buffer();
 666     req->handle = hthread;
 667     req->func   = func;
 668     req->param  = (void *)data;
 669     return !server_call( REQ_QUEUE_APC );
 670 }
 671
 672
 673 /**********************************************************************
 674  * GetThreadTimes [KERNEL32.???]  Obtains timing information.
 675  *
 676  * NOTES
 677  *    What are the fields where these values are stored?
 678  *
 679  * RETURNS
 680  *    Success: TRUE
 681  *    Failure: FALSE
 682  */
 683 BOOL WINAPI GetThreadTimes(
 684     HANDLE thread,         /* [in]  Specifies the thread of interest */
 685     LPFILETIME creationtime, /* [out] When the thread was created */
 686     LPFILETIME exittime,     /* [out] When the thread was destroyed */
 687     LPFILETIME kerneltime,   /* [out] Time thread spent in kernel mode */
 688     LPFILETIME usertime)     /* [out] Time thread spent in user mode */
 689 {
 690     FIXME("(0x%08x): stub\n",thread);
 691     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 692     return FALSE;
 693 }
 694
 695
 696 /**********************************************************************
 697  * AttachThreadInput [KERNEL32.8]  Attaches input of 1 thread to other
 698  *
 699  * Attaches the input processing mechanism of one thread to that of
 700  * another thread.
 701  *
 702  * RETURNS
 703  *    Success: TRUE
 704  *    Failure: FALSE
 705  *
 706  * TODO:
 707  *    1. Reset the Key State (currenly per thread key state is not maintained)
 708  */
 709 BOOL WINAPI AttachThreadInput(
 710     DWORD idAttach,   /* [in] Thread to attach */
 711     DWORD idAttachTo, /* [in] Thread to attach to */
 712     BOOL fAttach)   /* [in] Attach or detach */
 713 {
 714     MESSAGEQUEUE *pSrcMsgQ = 0, *pTgtMsgQ = 0;
 715     BOOL16 bRet = 0;
 716
 717     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 718
 719     /* A thread cannot attach to itself */
 720     if ( idAttach == idAttachTo )
 721         goto CLEANUP;
 722
 723     /* According to the docs this method should fail if a
 724      * "Journal record" hook is installed. (attaches all input queues together)
 725      */
 726     if ( HOOK_IsHooked( WH_JOURNALRECORD ) )
 727         goto CLEANUP;
 728
 729     /* Retrieve message queues corresponding to the thread id's */
 730     pTgtMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetThreadQueue16( idAttach ) );
 731     pSrcMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetThreadQueue16( idAttachTo ) );
 732
 733     /* Ensure we have message queues and that Src and Tgt threads
 734      * are not system threads.
 735      */
 736     if ( !pSrcMsgQ || !pTgtMsgQ || !pSrcMsgQ->pQData || !pTgtMsgQ->pQData )
 737         goto CLEANUP;
 738
 739     if (fAttach)   /* Attach threads */
 740     {
 741         /* Only attach if currently detached  */
 742         if ( pTgtMsgQ->pQData != pSrcMsgQ->pQData )
 743         {
 744             /* First release the target threads perQData */
 745             PERQDATA_Release( pTgtMsgQ->pQData );
 746
 747             /* Share a reference to the source threads perQDATA */
 748             PERQDATA_Addref( pSrcMsgQ->pQData );
 749             pTgtMsgQ->pQData = pSrcMsgQ->pQData;
 750         }
 751     }
 752     else    /* Detach threads */
 753     {
 754         /* Only detach if currently attached */
 755         if ( pTgtMsgQ->pQData == pSrcMsgQ->pQData )
 756         {
 757             /* First release the target threads perQData */
 758             PERQDATA_Release( pTgtMsgQ->pQData );
 759
 760             /* Give the target thread its own private perQDATA once more */
 761             pTgtMsgQ->pQData = PERQDATA_CreateInstance();
 762         }
 763     }
 764
 765     /* TODO: Reset the Key State */
 766
 767     bRet = 1;      /* Success */
 768
 769 CLEANUP:
 770
 771     /* Unlock the queues before returning */
 772     if ( pSrcMsgQ )
 773         QUEUE_Unlock( pSrcMsgQ );
 774     if ( pTgtMsgQ )
 775         QUEUE_Unlock( pTgtMsgQ );
 776
 777     return bRet;
 778 }
 779
 780 /**********************************************************************
 781  * VWin32_BoostThreadGroup [KERNEL.535]
 782  */
 783 VOID WINAPI VWin32_BoostThreadGroup( DWORD threadId, INT boost )
 784 {
 785     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 786 }
 787
 788 /**********************************************************************
 789  * VWin32_BoostThreadStatic [KERNEL.536]
 790  */
 791 VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
 792 {
 793     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 794 }
 795
 796 /**********************************************************************
 797  * SetThreadLocale [KERNEL32.671]  Sets the calling threads current locale.
 798  *
 799  * RETURNS
 800  *    Success: TRUE
 801  *    Failure: FALSE
 802  *
 803  * NOTES
 804  *  Implemented in NT only (3.1 and above according to MS
 805  */
 806 BOOL WINAPI SetThreadLocale(
 807     LCID lcid)     /* [in] Locale identifier */
 808 {
 809     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 810     return FALSE;
 811 }
 812
 813
 814 /**********************************************************************
 815  * SetLastError [KERNEL.147] [KERNEL32.497]  Sets the last-error code.
 816  *
 817  * RETURNS
 818  *    None.
 819  */
 820 #undef SetLastError
 821 void WINAPI SetLastError( DWORD error ) /* [in] Per-thread error code */
 822 {
 823     NtCurrentTeb()->last_error = error;
 824 }
 825
 826
 827 /***********************************************************************
 828  * GetCurrentThreadId [KERNEL32.201]  Returns thread identifier.
 829  *
 830  * RETURNS
 831  *    Thread identifier of calling thread
 832  */
 833 #undef GetCurrentThreadId
 834 DWORD WINAPI GetCurrentThreadId(void)
 835 {
 836     return (DWORD)NtCurrentTeb()->tid;
 837 }