scheduler/thread.c

   1 /*
   2  * Win32 threads
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include "config.h"
   8
   9 #include <assert.h>
  10 #include <fcntl.h>
  11 #include <sys/types.h>
  12 #ifdef HAVE_SYS_MMAN_H
  13 #include <sys/mman.h>
  14 #endif
  15 #include <unistd.h>
  16 #include "wine/winbase16.h"
  17 #include "thread.h"
  18 #include "process.h"
  19 #include "task.h"
  20 #include "module.h"
  21 #include "global.h"
  22 #include "user.h"
  23 #include "winerror.h"
  24 #include "heap.h"
  25 #include "selectors.h"
  26 #include "winnt.h"
  27 #include "server.h"
  28 #include "services.h"
  29 #include "stackframe.h"
  30 #include "builtin16.h"
  31 #include "debugtools.h"
  32 #include "queue.h"
  33 #include "hook.h"
  34
  35 DEFAULT_DEBUG_CHANNEL(thread);
  36
  37 /* TEB of the initial thread */
  38 static TEB initial_teb;
  39
  40 /* The initial process PDB */
  41 static PDB initial_pdb;
  42
  43 /***********************************************************************
  44  *           THREAD_IsWin16
  45  */
  46 BOOL THREAD_IsWin16( TEB *teb )
  47 {
  48     return !teb || !(teb->tibflags & TEBF_WIN32);
  49 }
  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     struct get_thread_info_request *req = get_req_buffer();
  59
  60     if (!id || id == GetCurrentThreadId()) return NtCurrentTeb();
  61     req->handle = -1;
  62     req->tid_in = (void *)id;
  63     if (!server_call_noerr( REQ_GET_THREAD_INFO )) return req->teb;
  64
  65     /* Allow task handles to be used; convert to main thread */
  66     if ( IsTask16( id ) )
  67     {
  68         TDB *pTask = (TDB *)GlobalLock16( id );
  69         if (pTask) return pTask->teb;
  70     }
  71     SetLastError( ERROR_INVALID_PARAMETER );
  72     return NULL;
  73 }
  74
  75
  76 /***********************************************************************
  77  *           THREAD_InitTEB
  78  *
  79  * Initialization of a newly created TEB.
  80  */
  81 static BOOL THREAD_InitTEB( TEB *teb )
  82 {
  83     teb->except    = (void *)~0UL;
  84     teb->self      = teb;
  85     teb->tibflags  = TEBF_WIN32;
  86     teb->tls_ptr   = teb->tls_array;
  87     teb->exit_code = STILL_ACTIVE;
  88     teb->socket    = -1;
  89     teb->stack_top = (void *)~0UL;
  90     teb->StaticUnicodeString.MaximumLength = sizeof(teb->StaticUnicodeBuffer);
  91     teb->StaticUnicodeString.Buffer = (PWSTR)teb->StaticUnicodeBuffer;
  92     teb->teb_sel = SELECTOR_AllocBlock( teb, 0x1000, SEGMENT_DATA, TRUE, FALSE );
  93     return (teb->teb_sel != 0);
  94 }
  95
  96
  97 /***********************************************************************
  98  *           THREAD_FreeTEB
  99  *
 100  * Free data structures associated with a thread.
 101  * Must be called from the context of another thread.
 102  */
 103 static void CALLBACK THREAD_FreeTEB( TEB *teb )
 104 {
 105     TRACE("(%p) called\n", teb );
 106     if (teb->cleanup) SERVICE_Delete( teb->cleanup );
 107
 108     /* Free the associated memory */
 109
 110     if (teb->socket != -1) close( teb->socket );
 111     if (teb->stack_sel) SELECTOR_FreeBlock( teb->stack_sel, 1 );
 112     SELECTOR_FreeBlock( teb->teb_sel, 1 );
 113     if (teb->buffer) munmap( teb->buffer, teb->buffer_size );
 114     if (teb->debug_info) HeapFree( GetProcessHeap(), 0, teb->debug_info );
 115     VirtualFree( teb->stack_base, 0, MEM_RELEASE );
 116 }
 117
 118
 119 /***********************************************************************
 120  *           THREAD_InitStack
 121  *
 122  * Allocate the stack of a thread.
 123  */
 124 TEB *THREAD_InitStack( TEB *teb, DWORD stack_size, BOOL alloc_stack16 )
 125 {
 126     DWORD old_prot, total_size;
 127     DWORD page_size = VIRTUAL_GetPageSize();
 128     void *base;
 129
 130     /* Allocate the stack */
 131
 132     if (stack_size >= 16*1024*1024)
 133         WARN("Thread stack size is %ld MB.\n",stack_size/1024/1024);
 134
 135     /* if size is smaller than default, get stack size from parent */
 136     if (stack_size < 1024 * 1024)
 137     {
 138         if (teb)
 139             stack_size = 1024 * 1024;  /* no parent */
 140         else
 141             stack_size = ((char *)NtCurrentTeb()->stack_top - (char *)NtCurrentTeb()->stack_base
 142                           - SIGNAL_STACK_SIZE - 3 * page_size);
 143     }
 144
 145     /* FIXME: some Wine functions use a lot of stack, so we add 64Kb here */
 146     stack_size += 64 * 1024;
 147
 148     /* Memory layout in allocated block:
 149      *
 150      *   size                 contents
 151      * 1 page              NOACCESS guard page
 152      * SIGNAL_STACK_SIZE   signal stack
 153      * 1 page              NOACCESS guard page
 154      * 1 page              PAGE_GUARD guard page
 155      * stack_size          normal stack
 156      * 64Kb                16-bit stack (optional)
 157      * 1 page              TEB (except for initial thread)
 158      */
 159
 160     stack_size = (stack_size + (page_size - 1)) & ~(page_size - 1);
 161     total_size = stack_size + SIGNAL_STACK_SIZE + 3 * page_size;
 162     if (alloc_stack16) total_size += 0x10000;
 163     if (!teb) total_size += page_size;
 164
 165     if (!(base = VirtualAlloc( NULL, total_size, MEM_COMMIT, PAGE_EXECUTE_READWRITE )))
 166         return NULL;
 167
 168     if (!teb)
 169     {
 170         teb = (TEB *)((char *)base + total_size - page_size);
 171         if (!THREAD_InitTEB( teb ))
 172         {
 173             VirtualFree( base, 0, MEM_RELEASE );
 174             return NULL;
 175         }
 176     }
 177
 178     teb->stack_low    = base;
 179     teb->stack_base   = base;
 180     teb->signal_stack = (char *)base + page_size;
 181     teb->stack_top    = (char *)base + 3 * page_size + SIGNAL_STACK_SIZE + stack_size;
 182
 183     /* Setup guard pages */
 184
 185     VirtualProtect( base, 1, PAGE_NOACCESS, &old_prot );
 186     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE, 1, PAGE_NOACCESS, &old_prot );
 187     VirtualProtect( (char *)teb->signal_stack + SIGNAL_STACK_SIZE + page_size, 1,
 188                     PAGE_EXECUTE_READWRITE | PAGE_GUARD, &old_prot );
 189
 190     /* Allocate the 16-bit stack selector */
 191
 192     if (alloc_stack16)
 193     {
 194         teb->stack_sel = SELECTOR_AllocBlock( teb->stack_top, 0x10000, SEGMENT_DATA,
 195                                               FALSE, FALSE );
 196         if (!teb->stack_sel) goto error;
 197         teb->cur_stack = PTR_SEG_OFF_TO_SEGPTR( teb->stack_sel,
 198                                                 0x10000 - sizeof(STACK16FRAME) );
 199     }
 200     return teb;
 201
 202 error:
 203     THREAD_FreeTEB( teb );
 204     return NULL;
 205 }
 206
 207
 208 /***********************************************************************
 209  *           THREAD_Init
 210  *
 211  * Setup the initial thread.
 212  *
 213  * NOTES: The first allocated TEB on NT is at 0x7ffde000.
 214  */
 215 void THREAD_Init(void)
 216 {
 217     if (!initial_teb.self)  /* do it only once */
 218     {
 219         THREAD_InitTEB( &initial_teb );
 220         assert( initial_teb.teb_sel );
 221         initial_teb.process = &initial_pdb;
 222         SYSDEPS_SetCurThread( &initial_teb );
 223     }
 224 }
 225
 226 DECL_GLOBAL_CONSTRUCTOR(thread_init) { THREAD_Init(); }
 227
 228 /***********************************************************************
 229  *           THREAD_Create
 230  *
 231  */
 232 TEB *THREAD_Create( PDB *pdb, int fd, DWORD stack_size, BOOL alloc_stack16 )
 233 {
 234     TEB *teb;
 235
 236     if ((teb = THREAD_InitStack( NULL, stack_size, alloc_stack16 )))
 237     {
 238         teb->tibflags = (pdb->flags & PDB32_WIN16_PROC) ? 0 : TEBF_WIN32;
 239         teb->process  = pdb;
 240         teb->socket   = fd;
 241         fcntl( fd, F_SETFD, 1 ); /* set close on exec flag */
 242         TRACE("(%p) succeeded\n", teb);
 243     }
 244     return teb;
 245 }
 246
 247
 248 /***********************************************************************
 249  *           THREAD_Start
 250  *
 251  * Start execution of a newly created thread. Does not return.
 252  */
 253 static void THREAD_Start(void)
 254 {
 255     HANDLE cleanup_object;
 256     LPTHREAD_START_ROUTINE func = (LPTHREAD_START_ROUTINE)NtCurrentTeb()->entry_point;
 257
 258     /* install cleanup handler */
 259     if (DuplicateHandle( GetCurrentProcess(), GetCurrentThread(),
 260                          GetCurrentProcess(), &cleanup_object,
 261                          0, FALSE, DUPLICATE_SAME_ACCESS ))
 262         NtCurrentTeb()->cleanup = SERVICE_AddObject( cleanup_object, (PAPCFUNC)THREAD_FreeTEB,
 263                                                      (ULONG_PTR)NtCurrentTeb() );
 264
 265     PROCESS_CallUserSignalProc( USIG_THREAD_INIT, 0 );
 266     PE_InitTls();
 267     MODULE_DllThreadAttach( NULL );
 268     ExitThread( func( NtCurrentTeb()->entry_arg ) );
 269 }
 270
 271
 272 /***********************************************************************
 273  *           CreateThread   (KERNEL32.63)
 274  */
 275 HANDLE WINAPI CreateThread( SECURITY_ATTRIBUTES *sa, DWORD stack,
 276                             LPTHREAD_START_ROUTINE start, LPVOID param,
 277                             DWORD flags, LPDWORD id )
 278 {
 279     struct new_thread_request *req = get_req_buffer();
 280     int socket, handle = -1;
 281     TEB *teb;
 282     void *tid;
 283
 284     req->suspend = ((flags & CREATE_SUSPENDED) != 0);
 285     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
 286     if (server_call_fd( REQ_NEW_THREAD, -1, &socket )) return 0;
 287     handle = req->handle;
 288     tid = req->tid;
 289
 290     if (!(teb = THREAD_Create( PROCESS_Current(), socket, stack, TRUE )))
 291     {
 292         close( socket );
 293         return 0;
 294     }
 295     teb->tibflags   |= TEBF_WIN32;
 296     teb->entry_point = start;
 297     teb->entry_arg   = param;
 298     teb->startup     = THREAD_Start;
 299     if (id) *id = (DWORD)tid;
 300     if (SYSDEPS_SpawnThread( teb ) == -1)
 301     {
 302         CloseHandle( handle );
 303         return 0;
 304     }
 305     return handle;
 306 }
 307
 308 /***********************************************************************
 309  *           CreateThread16   (KERNEL.441)
 310  */
 311 static DWORD CALLBACK THREAD_StartThread16( LPVOID threadArgs )
 312 {
 313     FARPROC16 start = ((FARPROC16 *)threadArgs)[0];
 314     DWORD     param = ((DWORD *)threadArgs)[1];
 315     HeapFree( GetProcessHeap(), 0, threadArgs );
 316
 317     ((LPDWORD)CURRENT_STACK16)[-1] = param;
 318     return CallTo16Long( start, sizeof(DWORD) );
 319 }
 320 HANDLE WINAPI CreateThread16( SECURITY_ATTRIBUTES *sa, DWORD stack,
 321                               FARPROC16 start, SEGPTR param,
 322                               DWORD flags, LPDWORD id )
 323 {
 324     DWORD *threadArgs = HeapAlloc( GetProcessHeap(), 0, 2*sizeof(DWORD) );
 325     if (!threadArgs) return INVALID_HANDLE_VALUE;
 326     threadArgs[0] = (DWORD)start;
 327     threadArgs[1] = (DWORD)param;
 328
 329     return CreateThread( sa, stack, THREAD_StartThread16, threadArgs, flags, id );
 330 }
 331
 332
 333 /***********************************************************************
 334  * ExitThread [KERNEL32.215]  Ends a thread
 335  *
 336  * RETURNS
 337  *    None
 338  */
 339 void WINAPI ExitThread( DWORD code ) /* [in] Exit code for this thread */
 340 {
 341     struct terminate_thread_request *req = get_req_buffer();
 342
 343      /* send the exit code to the server */
 344     req->handle    = GetCurrentThread();
 345     req->exit_code = code;
 346     server_call( REQ_TERMINATE_THREAD );
 347     if (req->last)
 348     {
 349         MODULE_DllProcessDetach( TRUE, (LPVOID)1 );
 350         TASK_KillTask( 0 );
 351         exit( code );
 352     }
 353     else
 354     {
 355         MODULE_DllThreadDetach( NULL );
 356         PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
 357         SYSDEPS_ExitThread( code );
 358     }
 359 }
 360
 361
 362 /**********************************************************************
 363  * SetLastErrorEx [USER32.485]  Sets the last-error code.
 364  *
 365  * RETURNS
 366  *    None.
 367  */
 368 void WINAPI SetLastErrorEx(
 369     DWORD error, /* [in] Per-thread error code */
 370     DWORD type)  /* [in] Error type */
 371 {
 372     TRACE("(0x%08lx, 0x%08lx)\n", error,type);
 373     switch(type) {
 374         case 0:
 375             break;
 376         case SLE_ERROR:
 377         case SLE_MINORERROR:
 378         case SLE_WARNING:
 379             /* Fall through for now */
 380         default:
 381             FIXME("(error=%08lx, type=%08lx): Unhandled type\n", error,type);
 382             break;
 383     }
 384     SetLastError( error );
 385 }
 386
 387
 388 /**********************************************************************
 389  * TlsAlloc [KERNEL32.530]  Allocates a TLS index.
 390  *
 391  * Allocates a thread local storage index
 392  *
 393  * RETURNS
 394  *    Success: TLS Index
 395  *    Failure: 0xFFFFFFFF
 396  */
 397 DWORD WINAPI TlsAlloc( void )
 398 {
 399     PDB *process = PROCESS_Current();
 400     DWORD i, mask, ret = 0;
 401     DWORD *bits = process->tls_bits;
 402     EnterCriticalSection( &process->crit_section );
 403     if (*bits == 0xffffffff)
 404     {
 405         bits++;
 406         ret = 32;
 407         if (*bits == 0xffffffff)
 408         {
 409             LeaveCriticalSection( &process->crit_section );
 410             SetLastError( ERROR_NO_MORE_ITEMS );
 411             return 0xffffffff;
 412         }
 413     }
 414     for (i = 0, mask = 1; i < 32; i++, mask <<= 1) if (!(*bits & mask)) break;
 415     *bits |= mask;
 416     LeaveCriticalSection( &process->crit_section );
 417     return ret + i;
 418 }
 419
 420
 421 /**********************************************************************
 422  * TlsFree [KERNEL32.531]  Releases a TLS index.
 423  *
 424  * Releases a thread local storage index, making it available for reuse
 425  *
 426  * RETURNS
 427  *    Success: TRUE
 428  *    Failure: FALSE
 429  */
 430 BOOL WINAPI TlsFree(
 431     DWORD index) /* [in] TLS Index to free */
 432 {
 433     PDB *process = PROCESS_Current();
 434     DWORD mask;
 435     DWORD *bits = process->tls_bits;
 436     if (index >= 64)
 437     {
 438         SetLastError( ERROR_INVALID_PARAMETER );
 439         return FALSE;
 440     }
 441     EnterCriticalSection( &process->crit_section );
 442     if (index >= 32) bits++;
 443     mask = (1 << (index & 31));
 444     if (!(*bits & mask))  /* already free? */
 445     {
 446         LeaveCriticalSection( &process->crit_section );
 447         SetLastError( ERROR_INVALID_PARAMETER );
 448         return FALSE;
 449     }
 450     *bits &= ~mask;
 451     NtCurrentTeb()->tls_array[index] = 0;
 452     /* FIXME: should zero all other thread values */
 453     LeaveCriticalSection( &process->crit_section );
 454     return TRUE;
 455 }
 456
 457
 458 /**********************************************************************
 459  * TlsGetValue [KERNEL32.532]  Gets value in a thread's TLS slot
 460  *
 461  * RETURNS
 462  *    Success: Value stored in calling thread's TLS slot for index
 463  *    Failure: 0 and GetLastError returns NO_ERROR
 464  */
 465 LPVOID WINAPI TlsGetValue(
 466     DWORD index) /* [in] TLS index to retrieve value for */
 467 {
 468     if (index >= 64)
 469     {
 470         SetLastError( ERROR_INVALID_PARAMETER );
 471         return NULL;
 472     }
 473     SetLastError( ERROR_SUCCESS );
 474     return NtCurrentTeb()->tls_array[index];
 475 }
 476
 477
 478 /**********************************************************************
 479  * TlsSetValue [KERNEL32.533]  Stores a value in the thread's TLS slot.
 480  *
 481  * RETURNS
 482  *    Success: TRUE
 483  *    Failure: FALSE
 484  */
 485 BOOL WINAPI TlsSetValue(
 486     DWORD index,  /* [in] TLS index to set value for */
 487     LPVOID value) /* [in] Value to be stored */
 488 {
 489     if (index >= 64)
 490     {
 491         SetLastError( ERROR_INVALID_PARAMETER );
 492         return FALSE;
 493     }
 494     NtCurrentTeb()->tls_array[index] = value;
 495     return TRUE;
 496 }
 497
 498
 499 /***********************************************************************
 500  * SetThreadContext [KERNEL32.670]  Sets context of thread.
 501  *
 502  * RETURNS
 503  *    Success: TRUE
 504  *    Failure: FALSE
 505  */
 506 BOOL WINAPI SetThreadContext( HANDLE handle,           /* [in]  Handle to thread with context */
 507                               const CONTEXT *context ) /* [in] Address of context structure */
 508 {
 509     struct set_thread_context_request *req = get_req_buffer();
 510     req->handle = handle;
 511     req->flags = context->ContextFlags;
 512     memcpy( &req->context, context, sizeof(*context) );
 513     return !server_call( REQ_SET_THREAD_CONTEXT );
 514 }
 515
 516
 517 /***********************************************************************
 518  * GetThreadContext [KERNEL32.294]  Retrieves context of thread.
 519  *
 520  * RETURNS
 521  *    Success: TRUE
 522  *    Failure: FALSE
 523  */
 524 BOOL WINAPI GetThreadContext( HANDLE handle,     /* [in]  Handle to thread with context */
 525                               CONTEXT *context ) /* [out] Address of context structure */
 526 {
 527     struct get_thread_context_request *req = get_req_buffer();
 528     req->handle = handle;
 529     req->flags = context->ContextFlags;
 530     memcpy( &req->context, context, sizeof(*context) );
 531     if (server_call( REQ_GET_THREAD_CONTEXT )) return FALSE;
 532     memcpy( context, &req->context, sizeof(*context) );
 533     return TRUE;
 534 }
 535
 536
 537 /**********************************************************************
 538  * GetThreadPriority [KERNEL32.296]  Returns priority for thread.
 539  *
 540  * RETURNS
 541  *    Success: Thread's priority level.
 542  *    Failure: THREAD_PRIORITY_ERROR_RETURN
 543  */
 544 INT WINAPI GetThreadPriority(
 545     HANDLE hthread) /* [in] Handle to thread */
 546 {
 547     INT ret = THREAD_PRIORITY_ERROR_RETURN;
 548     struct get_thread_info_request *req = get_req_buffer();
 549     req->handle = hthread;
 550     req->tid_in = 0;
 551     if (!server_call( REQ_GET_THREAD_INFO )) ret = req->priority;
 552     return ret;
 553 }
 554
 555
 556 /**********************************************************************
 557  * SetThreadPriority [KERNEL32.514]  Sets priority for thread.
 558  *
 559  * RETURNS
 560  *    Success: TRUE
 561  *    Failure: FALSE
 562  */
 563 BOOL WINAPI SetThreadPriority(
 564     HANDLE hthread, /* [in] Handle to thread */
 565     INT priority)   /* [in] Thread priority level */
 566 {
 567     struct set_thread_info_request *req = get_req_buffer();
 568     req->handle   = hthread;
 569     req->priority = priority;
 570     req->mask     = SET_THREAD_INFO_PRIORITY;
 571     return !server_call( REQ_SET_THREAD_INFO );
 572 }
 573
 574
 575 /**********************************************************************
 576  *           SetThreadAffinityMask   (KERNEL32.669)
 577  */
 578 DWORD WINAPI SetThreadAffinityMask( HANDLE hThread, DWORD dwThreadAffinityMask )
 579 {
 580     struct set_thread_info_request *req = get_req_buffer();
 581     req->handle   = hThread;
 582     req->affinity = dwThreadAffinityMask;
 583     req->mask     = SET_THREAD_INFO_AFFINITY;
 584     if (server_call( REQ_SET_THREAD_INFO )) return 0;
 585     return 1;  /* FIXME: should return previous value */
 586 }
 587
 588
 589 /**********************************************************************
 590  * TerminateThread [KERNEL32.685]  Terminates a thread
 591  *
 592  * RETURNS
 593  *    Success: TRUE
 594  *    Failure: FALSE
 595  */
 596 BOOL WINAPI TerminateThread(
 597     HANDLE handle, /* [in] Handle to thread */
 598     DWORD exitcode)  /* [in] Exit code for thread */
 599 {
 600     BOOL ret;
 601     struct terminate_thread_request *req = get_req_buffer();
 602     req->handle    = handle;
 603     req->exit_code = exitcode;
 604     if ((ret = !server_call( REQ_TERMINATE_THREAD )) && req->self)
 605     {
 606         PROCESS_CallUserSignalProc( USIG_THREAD_EXIT, 0 );
 607         if (req->last) exit( exitcode );
 608         else SYSDEPS_ExitThread( exitcode );
 609     }
 610     return ret;
 611 }
 612
 613
 614 /**********************************************************************
 615  * GetExitCodeThread [KERNEL32.???]  Gets termination status of thread.
 616  *
 617  * RETURNS
 618  *    Success: TRUE
 619  *    Failure: FALSE
 620  */
 621 BOOL WINAPI GetExitCodeThread(
 622     HANDLE hthread, /* [in]  Handle to thread */
 623     LPDWORD exitcode) /* [out] Address to receive termination status */
 624 {
 625     BOOL ret = FALSE;
 626     struct get_thread_info_request *req = get_req_buffer();
 627     req->handle = hthread;
 628     req->tid_in = 0;
 629     if (!server_call( REQ_GET_THREAD_INFO ))
 630     {
 631         if (exitcode) *exitcode = req->exit_code;
 632         ret = TRUE;
 633     }
 634     return ret;
 635 }
 636
 637
 638 /**********************************************************************
 639  * ResumeThread [KERNEL32.587]  Resumes a thread.
 640  *
 641  * Decrements a thread's suspend count.  When count is zero, the
 642  * execution of the thread is resumed.
 643  *
 644  * RETURNS
 645  *    Success: Previous suspend count
 646  *    Failure: 0xFFFFFFFF
 647  *    Already running: 0
 648  */
 649 DWORD WINAPI ResumeThread(
 650     HANDLE hthread) /* [in] Identifies thread to restart */
 651 {
 652     DWORD ret = 0xffffffff;
 653     struct resume_thread_request *req = get_req_buffer();
 654     req->handle = hthread;
 655     if (!server_call( REQ_RESUME_THREAD )) ret = req->count;
 656     return ret;
 657 }
 658
 659
 660 /**********************************************************************
 661  * SuspendThread [KERNEL32.681]  Suspends a thread.
 662  *
 663  * RETURNS
 664  *    Success: Previous suspend count
 665  *    Failure: 0xFFFFFFFF
 666  */
 667 DWORD WINAPI SuspendThread(
 668     HANDLE hthread) /* [in] Handle to the thread */
 669 {
 670     DWORD ret = 0xffffffff;
 671     struct suspend_thread_request *req = get_req_buffer();
 672     req->handle = hthread;
 673     if (!server_call( REQ_SUSPEND_THREAD )) ret = req->count;
 674     return ret;
 675 }
 676
 677
 678 /***********************************************************************
 679  *              QueueUserAPC  (KERNEL32.566)
 680  */
 681 DWORD WINAPI QueueUserAPC( PAPCFUNC func, HANDLE hthread, ULONG_PTR data )
 682 {
 683     struct queue_apc_request *req = get_req_buffer();
 684     req->handle = hthread;
 685     req->func   = func;
 686     req->param  = (void *)data;
 687     return !server_call( REQ_QUEUE_APC );
 688 }
 689
 690
 691 /**********************************************************************
 692  * GetThreadTimes [KERNEL32.???]  Obtains timing information.
 693  *
 694  * NOTES
 695  *    What are the fields where these values are stored?
 696  *
 697  * RETURNS
 698  *    Success: TRUE
 699  *    Failure: FALSE
 700  */
 701 BOOL WINAPI GetThreadTimes(
 702     HANDLE thread,         /* [in]  Specifies the thread of interest */
 703     LPFILETIME creationtime, /* [out] When the thread was created */
 704     LPFILETIME exittime,     /* [out] When the thread was destroyed */
 705     LPFILETIME kerneltime,   /* [out] Time thread spent in kernel mode */
 706     LPFILETIME usertime)     /* [out] Time thread spent in user mode */
 707 {
 708     FIXME("(0x%08x): stub\n",thread);
 709     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 710     return FALSE;
 711 }
 712
 713
 714 /**********************************************************************
 715  * AttachThreadInput [KERNEL32.8]  Attaches input of 1 thread to other
 716  *
 717  * Attaches the input processing mechanism of one thread to that of
 718  * another thread.
 719  *
 720  * RETURNS
 721  *    Success: TRUE
 722  *    Failure: FALSE
 723  *
 724  * TODO:
 725  *    1. Reset the Key State (currenly per thread key state is not maintained)
 726  */
 727 BOOL WINAPI AttachThreadInput(
 728     DWORD idAttach,   /* [in] Thread to attach */
 729     DWORD idAttachTo, /* [in] Thread to attach to */
 730     BOOL fAttach)   /* [in] Attach or detach */
 731 {
 732     MESSAGEQUEUE *pSrcMsgQ = 0, *pTgtMsgQ = 0;
 733     BOOL16 bRet = 0;
 734
 735     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 736
 737     /* A thread cannot attach to itself */
 738     if ( idAttach == idAttachTo )
 739         goto CLEANUP;
 740
 741     /* According to the docs this method should fail if a
 742      * "Journal record" hook is installed. (attaches all input queues together)
 743      */
 744     if ( HOOK_IsHooked( WH_JOURNALRECORD ) )
 745         goto CLEANUP;
 746
 747     /* Retrieve message queues corresponding to the thread id's */
 748     pTgtMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetThreadQueue16( idAttach ) );
 749     pSrcMsgQ = (MESSAGEQUEUE *)QUEUE_Lock( GetThreadQueue16( idAttachTo ) );
 750
 751     /* Ensure we have message queues and that Src and Tgt threads
 752      * are not system threads.
 753      */
 754     if ( !pSrcMsgQ || !pTgtMsgQ || !pSrcMsgQ->pQData || !pTgtMsgQ->pQData )
 755         goto CLEANUP;
 756
 757     if (fAttach)   /* Attach threads */
 758     {
 759         /* Only attach if currently detached  */
 760         if ( pTgtMsgQ->pQData != pSrcMsgQ->pQData )
 761         {
 762             /* First release the target threads perQData */
 763             PERQDATA_Release( pTgtMsgQ->pQData );
 764
 765             /* Share a reference to the source threads perQDATA */
 766             PERQDATA_Addref( pSrcMsgQ->pQData );
 767             pTgtMsgQ->pQData = pSrcMsgQ->pQData;
 768         }
 769     }
 770     else    /* Detach threads */
 771     {
 772         /* Only detach if currently attached */
 773         if ( pTgtMsgQ->pQData == pSrcMsgQ->pQData )
 774         {
 775             /* First release the target threads perQData */
 776             PERQDATA_Release( pTgtMsgQ->pQData );
 777
 778             /* Give the target thread its own private perQDATA once more */
 779             pTgtMsgQ->pQData = PERQDATA_CreateInstance();
 780         }
 781     }
 782
 783     /* TODO: Reset the Key State */
 784
 785     bRet = 1;      /* Success */
 786
 787 CLEANUP:
 788
 789     /* Unlock the queues before returning */
 790     if ( pSrcMsgQ )
 791         QUEUE_Unlock( pSrcMsgQ );
 792     if ( pTgtMsgQ )
 793         QUEUE_Unlock( pTgtMsgQ );
 794
 795     return bRet;
 796 }
 797
 798 /**********************************************************************
 799  * VWin32_BoostThreadGroup [KERNEL.535]
 800  */
 801 VOID WINAPI VWin32_BoostThreadGroup( DWORD threadId, INT boost )
 802 {
 803     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 804 }
 805
 806 /**********************************************************************
 807  * VWin32_BoostThreadStatic [KERNEL.536]
 808  */
 809 VOID WINAPI VWin32_BoostThreadStatic( DWORD threadId, INT boost )
 810 {
 811     FIXME("(0x%08lx,%d): stub\n", threadId, boost);
 812 }
 813
 814 /**********************************************************************
 815  * SetThreadLocale [KERNEL32.671]  Sets the calling threads current locale.
 816  *
 817  * RETURNS
 818  *    Success: TRUE
 819  *    Failure: FALSE
 820  *
 821  * NOTES
 822  *  Implemented in NT only (3.1 and above according to MS
 823  */
 824 BOOL WINAPI SetThreadLocale(
 825     LCID lcid)     /* [in] Locale identifier */
 826 {
 827     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
 828     return FALSE;
 829 }
 830
 831
 832 /***********************************************************************
 833  * GetCurrentThread [KERNEL32.200]  Gets pseudohandle for current thread
 834  *
 835  * RETURNS
 836  *    Pseudohandle for the current thread
 837  */
 838 #undef GetCurrentThread
 839 HANDLE WINAPI GetCurrentThread(void)
 840 {
 841     return 0xfffffffe;
 842 }
 843
 844
 845 #ifdef __i386__
 846
 847 /* void WINAPI SetLastError( DWORD error ); */
 848 __ASM_GLOBAL_FUNC( SetLastError,
 849                    "movl 4(%esp),%eax\n\t"
 850                    ".byte 0x64\n\t"
 851                    "movl %eax,0x60\n\t"
 852                    "ret $4" );
 853
 854 /* DWORD WINAPI GetLastError(void); */
 855 __ASM_GLOBAL_FUNC( GetLastError, ".byte 0x64\n\tmovl 0x60,%eax\n\tret" );
 856
 857 /* DWORD WINAPI GetCurrentProcessId(void) */
 858 __ASM_GLOBAL_FUNC( GetCurrentProcessId, ".byte 0x64\n\tmovl 0x20,%eax\n\tret" );
 859
 860 /* DWORD WINAPI GetCurrentThreadId(void) */
 861 __ASM_GLOBAL_FUNC( GetCurrentThreadId, ".byte 0x64\n\tmovl 0x24,%eax\n\tret" );
 862
 863 #else  /* __i386__ */
 864
 865 /**********************************************************************
 866  * SetLastError [KERNEL.147] [KERNEL32.497]  Sets the last-error code.
 867  */
 868 void WINAPI SetLastError( DWORD error ) /* [in] Per-thread error code */
 869 {
 870     NtCurrentTeb()->last_error = error;
 871 }
 872
 873 /**********************************************************************
 874  * GetLastError [KERNEL.148] [KERNEL32.227]  Returns last-error code.
 875  */
 876 DWORD WINAPI GetLastError(void)
 877 {
 878     return NtCurrentTeb()->last_error;
 879 }
 880
 881 /***********************************************************************
 882  * GetCurrentProcessId [KERNEL32.199]  Returns process identifier.
 883  */
 884 DWORD WINAPI GetCurrentProcessId(void)
 885 {
 886     return (DWORD)NtCurrentTeb()->pid;
 887 }
 888
 889 /***********************************************************************
 890  * GetCurrentThreadId [KERNEL32.201]  Returns thread identifier.
 891  */
 892 DWORD WINAPI GetCurrentThreadId(void)
 893 {
 894     return (DWORD)NtCurrentTeb()->tid;
 895 }
 896
 897 #endif  /* __i386__ */