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   MSVCRT__beginthread_start_routine_t start_address;
  29   void *arglist;
  30 } _beginthread_trampoline_t;
  31
  32 /*********************************************************************
  33  *              msvcrt_get_thread_data
  34  *
  35  * Return the thread local storage structure.
  36  */
  37 thread_data_t *msvcrt_get_thread_data(void)
  38 {
  39     thread_data_t *ptr;
  40     DWORD err = GetLastError();  /* need to preserve last error */
  41
  42     if (!(ptr = TlsGetValue( msvcrt_tls_index )))
  43     {
  44         if (!(ptr = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*ptr) )))
  45             _amsg_exit( _RT_THREAD );
  46         if (!TlsSetValue( msvcrt_tls_index, ptr )) _amsg_exit( _RT_THREAD );
  47         ptr->random_seed = 1;
  48     }
  49     SetLastError( err );
  50     return ptr;
  51 }
  52
  53
  54 /*********************************************************************
  55  *              _beginthread_trampoline
  56  */
  57 static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
  58 {
  59     _beginthread_trampoline_t local_trampoline;
  60
  61     /* Maybe it's just being paranoid, but freeing arg right
  62      * away seems safer.
  63      */
  64     memcpy(&local_trampoline,arg,sizeof(local_trampoline));
  65     MSVCRT_free(arg);
  66
  67     local_trampoline.start_address(local_trampoline.arglist);
  68     return 0;
  69 }
  70
  71 /*********************************************************************
  72  *              _beginthread (MSVCRT.@)
  73  */
  74 MSVCRT_uintptr_t _beginthread(
  75   MSVCRT__beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
  76   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
  77   void *arglist)           /* [in] Argument list to be passed to new thread or NULL */
  78 {
  79   _beginthread_trampoline_t* trampoline;
  80
  81   TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
  82
  83   /* Allocate the trampoline here so that it is still valid when the thread
  84    * starts... typically after this function has returned.
  85    * _beginthread_trampoline is responsible for freeing the trampoline
  86    */
  87   trampoline=MSVCRT_malloc(sizeof(*trampoline));
  88   trampoline->start_address = start_address;
  89   trampoline->arglist = arglist;
  90
  91   /* FIXME */
  92   return (MSVCRT_uintptr_t)CreateThread(NULL, stack_size, _beginthread_trampoline,
  93                                      trampoline, 0, NULL);
  94 }
  95
  96 /*********************************************************************
  97  *              _beginthreadex (MSVCRT.@)
  98  */
  99 MSVCRT_uintptr_t _beginthreadex(
 100   void *security,          /* [in] Security descriptor for new thread; must be NULL for Windows 9x applications */
 101   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 102   MSVCRT__beginthreadex_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 103   void *arglist,           /* [in] Argument list to be passed to new thread or NULL */
 104   unsigned int initflag,   /* [in] Initial state of new thread (0 for running or CREATE_SUSPEND for suspended) */
 105   unsigned int *thrdaddr)  /* [out] Points to a 32-bit variable that receives the thread identifier */
 106 {
 107   TRACE("(%p, %d, %p, %p, %d, %p)\n", security, stack_size, start_address, arglist, initflag, thrdaddr);
 108
 109   /* FIXME */
 110   return (MSVCRT_uintptr_t)CreateThread(security, stack_size,
 111                                      (LPTHREAD_START_ROUTINE) start_address,
 112                                      arglist, initflag, (LPDWORD) thrdaddr);
 113 }
 114
 115 /*********************************************************************
 116  *              _endthread (MSVCRT.@)
 117  */
 118 void _endthread(void)
 119 {
 120   TRACE("(void)\n");
 121
 122   /* FIXME */
 123   ExitThread(0);
 124 }
 125
 126 /*********************************************************************
 127  *              _endthreadex (MSVCRT.@)
 128  */
 129 void _endthreadex(
 130   unsigned int retval) /* [in] Thread exit code */
 131 {
 132   TRACE("(%d)\n", retval);
 133
 134   /* FIXME */
 135   ExitThread(retval);
 136 }