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