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 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  *              _endthread (MSVCRT.@)
  60  */
  61 void CDECL _endthread(void)
  62 {
  63   thread_data_t *tls;
  64
  65   TRACE("(void)\n");
  66
  67   tls = TlsGetValue(msvcrt_tls_index);
  68   if (tls && tls->handle != INVALID_HANDLE_VALUE)
  69   {
  70       CloseHandle(tls->handle);
  71       tls->handle = INVALID_HANDLE_VALUE;
  72   } else
  73       WARN("tls=%p tls->handle=%p\n", tls, tls ? tls->handle : INVALID_HANDLE_VALUE);
  74
  75   /* FIXME */
  76   ExitThread(0);
  77 }
  78
  79 /*********************************************************************
  80  *              _endthreadex (MSVCRT.@)
  81  */
  82 void CDECL _endthreadex(
  83   unsigned int retval) /* [in] Thread exit code */
  84 {
  85   TRACE("(%d)\n", retval);
  86
  87   /* FIXME */
  88   ExitThread(retval);
  89 }
  90
  91 /*********************************************************************
  92  *              _beginthread_trampoline
  93  */
  94 static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
  95 {
  96     _beginthread_trampoline_t local_trampoline;
  97     thread_data_t *data = msvcrt_get_thread_data();
  98
  99     memcpy(&local_trampoline,arg,sizeof(local_trampoline));
 100     data->handle = local_trampoline.thread;
 101     MSVCRT_free(arg);
 102
 103     local_trampoline.start_address(local_trampoline.arglist);
 104     _endthread();
 105     return 0;
 106 }
 107
 108 /*********************************************************************
 109  *              _beginthread (MSVCRT.@)
 110  */
 111 MSVCRT_uintptr_t CDECL _beginthread(
 112   MSVCRT__beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 113   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 114   void *arglist)           /* [in] Argument list to be passed to new thread or NULL */
 115 {
 116   _beginthread_trampoline_t* trampoline;
 117   HANDLE thread;
 118
 119   TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
 120
 121   trampoline = MSVCRT_malloc(sizeof(*trampoline));
 122   if(!trampoline) {
 123       *MSVCRT__errno() = MSVCRT_EAGAIN;
 124       return -1;
 125   }
 126
 127   thread = CreateThread(NULL, stack_size, _beginthread_trampoline,
 128           trampoline, CREATE_SUSPENDED, NULL);
 129   if(!thread) {
 130       MSVCRT_free(trampoline);
 131       *MSVCRT__errno() = MSVCRT_EAGAIN;
 132       return -1;
 133   }
 134
 135   trampoline->thread = thread;
 136   trampoline->start_address = start_address;
 137   trampoline->arglist = arglist;
 138
 139   if(ResumeThread(thread) == -1) {
 140       MSVCRT_free(trampoline);
 141       *MSVCRT__errno() = MSVCRT_EAGAIN;
 142       return -1;
 143   }
 144
 145   return (MSVCRT_uintptr_t)thread;
 146 }
 147
 148 /*********************************************************************
 149  *              _beginthreadex (MSVCRT.@)
 150  */
 151 MSVCRT_uintptr_t CDECL _beginthreadex(
 152   void *security,          /* [in] Security descriptor for new thread; must be NULL for Windows 9x applications */
 153   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 154   MSVCRT__beginthreadex_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 155   void *arglist,           /* [in] Argument list to be passed to new thread or NULL */
 156   unsigned int initflag,   /* [in] Initial state of new thread (0 for running or CREATE_SUSPEND for suspended) */
 157   unsigned int *thrdaddr)  /* [out] Points to a 32-bit variable that receives the thread identifier */
 158 {
 159   TRACE("(%p, %d, %p, %p, %d, %p)\n", security, stack_size, start_address, arglist, initflag, thrdaddr);
 160
 161   /* FIXME */
 162   return (MSVCRT_uintptr_t)CreateThread(security, stack_size,
 163                                      start_address, arglist,
 164                                      initflag, thrdaddr);
 165 }
 166
 167 #if _MSVCR_VER>=80
 168 /*********************************************************************
 169  *              _getptd (MSVCR80.@)
 170  */
 171 thread_data_t* CDECL _getptd(void)
 172 {
 173     FIXME("returns undocumented/not fully filled data\n");
 174     return msvcrt_get_thread_data();
 175 }
 176 #endif