dlls/msvcrt/thread.c

   1 /*
   2  * msvcrt.dll thread functions
   3  *
   4  * Copyright 2000 Jon Griffiths
   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20 #include "msvcrt.h"
  21 #include "wine/debug.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  24
  25 /********************************************************************/
  26
  27 typedef struct {
  28   HANDLE is_ready, thread;
  29   MSVCRT__beginthread_start_routine_t start_address;
  30   void *arglist;
  31 } _beginthread_trampoline_t;
  32
  33 /*********************************************************************
  34  *              msvcrt_get_thread_data
  35  *
  36  * Return the thread local storage structure.
  37  */
  38 thread_data_t *msvcrt_get_thread_data(void)
  39 {
  40     thread_data_t *ptr;
  41     DWORD err = GetLastError();  /* need to preserve last error */
  42
  43     if (!(ptr = TlsGetValue( msvcrt_tls_index )))
  44     {
  45         if (!(ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ptr) )))
  46             _amsg_exit( _RT_THREAD );
  47         if (!TlsSetValue( msvcrt_tls_index, ptr )) _amsg_exit( _RT_THREAD );
  48         ptr->tid = GetCurrentThreadId();
  49         ptr->handle = INVALID_HANDLE_VALUE;
  50         ptr->random_seed = 1;
  51         ptr->locinfo = MSVCRT_locale->locinfo;
  52         ptr->mbcinfo = MSVCRT_locale->mbcinfo;
  53     }
  54     SetLastError( err );
  55     return ptr;
  56 }
  57
  58
  59 /*********************************************************************
  60  *              _beginthread_trampoline
  61  */
  62 static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
  63 {
  64     _beginthread_trampoline_t local_trampoline, *trampoline = arg;
  65     thread_data_t *data = msvcrt_get_thread_data();
  66
  67     if(!DuplicateHandle(GetCurrentProcess(), GetCurrentThread(), GetCurrentProcess(),
  68             &trampoline->thread, 0, TRUE, DUPLICATE_SAME_ACCESS)) {
  69         trampoline->thread = NULL;
  70         SetEvent(&trampoline->is_ready);
  71         return 0;
  72     }
  73
  74     memcpy(&local_trampoline, trampoline, sizeof(local_trampoline));
  75     data->handle = local_trampoline.thread;
  76     SetEvent(trampoline->is_ready);
  77
  78     local_trampoline.start_address(local_trampoline.arglist);
  79     return 0;
  80 }
  81
  82 /*********************************************************************
  83  *              _beginthread (MSVCRT.@)
  84  */
  85 MSVCRT_uintptr_t CDECL _beginthread(
  86   MSVCRT__beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
  87   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
  88   void *arglist)           /* [in] Argument list to be passed to new thread or NULL */
  89 {
  90   _beginthread_trampoline_t trampoline;
  91   HANDLE thread;
  92
  93   TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
  94
  95   trampoline.is_ready = CreateEventW(NULL, FALSE, FALSE, NULL);
  96   if(!trampoline.is_ready) {
  97       *MSVCRT__errno() = MSVCRT_EAGAIN;
  98       return -1;
  99   }
 100   trampoline.start_address = start_address;
 101   trampoline.arglist = arglist;
 102
 103   thread = CreateThread(NULL, stack_size, _beginthread_trampoline,
 104           &trampoline, 0, NULL);
 105   if(!thread) {
 106       *MSVCRT__errno() = MSVCRT_EAGAIN;
 107       return -1;
 108   }
 109   CloseHandle(thread);
 110
 111   WaitForSingleObject(trampoline.is_ready, INFINITE);
 112   CloseHandle(trampoline.is_ready);
 113
 114   if(!trampoline.thread) {
 115       *MSVCRT__errno() = MSVCRT_EAGAIN;
 116       return -1;
 117   }
 118   return (MSVCRT_uintptr_t)trampoline.thread;
 119 }
 120
 121 /*********************************************************************
 122  *              _beginthreadex (MSVCRT.@)
 123  */
 124 MSVCRT_uintptr_t CDECL _beginthreadex(
 125   void *security,          /* [in] Security descriptor for new thread; must be NULL for Windows 9x applications */
 126   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 127   MSVCRT__beginthreadex_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 128   void *arglist,           /* [in] Argument list to be passed to new thread or NULL */
 129   unsigned int initflag,   /* [in] Initial state of new thread (0 for running or CREATE_SUSPEND for suspended) */
 130   unsigned int *thrdaddr)  /* [out] Points to a 32-bit variable that receives the thread identifier */
 131 {
 132   TRACE("(%p, %d, %p, %p, %d, %p)\n", security, stack_size, start_address, arglist, initflag, thrdaddr);
 133
 134   /* FIXME */
 135   return (MSVCRT_uintptr_t)CreateThread(security, stack_size,
 136                                      start_address, arglist,
 137                                      initflag, thrdaddr);
 138 }
 139
 140 /*********************************************************************
 141  *              _endthread (MSVCRT.@)
 142  */
 143 void CDECL _endthread(void)
 144 {
 145   TRACE("(void)\n");
 146
 147   /* FIXME */
 148   ExitThread(0);
 149 }
 150
 151 /*********************************************************************
 152  *              _endthreadex (MSVCRT.@)
 153  */
 154 void CDECL _endthreadex(
 155   unsigned int retval) /* [in] Thread exit code */
 156 {
 157   TRACE("(%d)\n", retval);
 158
 159   /* FIXME */
 160   ExitThread(retval);
 161 }
 162
 163 /*********************************************************************
 164  * _getptd - not exported in native msvcrt
 165  */
 166 thread_data_t* CDECL _getptd(void)
 167 {
 168     FIXME("returns undocumented/not fully filled data\n");
 169     return msvcrt_get_thread_data();
 170 }