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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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     }
  48     SetLastError( err );
  49     return ptr;
  50 }
  51
  52
  53 /*********************************************************************
  54  *              _beginthread_trampoline
  55  */
  56 static DWORD CALLBACK _beginthread_trampoline(LPVOID arg)
  57 {
  58     _beginthread_trampoline_t local_trampoline;
  59
  60     /* Maybe it's just being paranoid, but freeing arg right
  61      * away seems safer.
  62      */
  63     memcpy(&local_trampoline,arg,sizeof(local_trampoline));
  64     MSVCRT_free(arg);
  65
  66     local_trampoline.start_address(local_trampoline.arglist);
  67     return 0;
  68 }
  69
  70 /*********************************************************************
  71  *              _beginthread (MSVCRT.@)
  72  */
  73 MSVCRT_uintptr_t _beginthread(
  74   MSVCRT__beginthread_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
  75   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
  76   void *arglist)           /* [in] Argument list to be passed to new thread or NULL */
  77 {
  78   _beginthread_trampoline_t* trampoline;
  79
  80   TRACE("(%p, %d, %p)\n", start_address, stack_size, arglist);
  81
  82   /* Allocate the trampoline here so that it is still valid when the thread
  83    * starts... typically after this function has returned.
  84    * _beginthread_trampoline is responsible for freeing the trampoline
  85    */
  86   trampoline=MSVCRT_malloc(sizeof(*trampoline));
  87   trampoline->start_address = start_address;
  88   trampoline->arglist = arglist;
  89
  90   /* FIXME */
  91   return (MSVCRT_uintptr_t)CreateThread(NULL, stack_size, _beginthread_trampoline,
  92                                      trampoline, 0, NULL);
  93 }
  94
  95 /*********************************************************************
  96  *              _beginthreadex (MSVCRT.@)
  97  */
  98 MSVCRT_uintptr_t _beginthreadex(
  99   void *security,          /* [in] Security descriptor for new thread; must be NULL for Windows 9x applications */
 100   unsigned int stack_size, /* [in] Stack size for new thread or 0 */
 101   MSVCRT__beginthreadex_start_routine_t start_address, /* [in] Start address of routine that begins execution of new thread */
 102   void *arglist,           /* [in] Argument list to be passed to new thread or NULL */
 103   unsigned int initflag,   /* [in] Initial state of new thread (0 for running or CREATE_SUSPEND for suspended) */
 104   unsigned int *thrdaddr)  /* [out] Points to a 32-bit variable that receives the thread identifier */
 105 {
 106   TRACE("(%p, %d, %p, %p, %d, %p)\n", security, stack_size, start_address, arglist, initflag, thrdaddr);
 107
 108   /* FIXME */
 109   return (MSVCRT_uintptr_t)CreateThread(security, stack_size,
 110                                      (LPTHREAD_START_ROUTINE) start_address,
 111                                      arglist, initflag, (LPDWORD) thrdaddr);
 112 }
 113
 114 /*********************************************************************
 115  *              _endthread (MSVCRT.@)
 116  */
 117 void _endthread(void)
 118 {
 119   TRACE("(void)\n");
 120
 121   /* FIXME */
 122   ExitThread(0);
 123 }
 124
 125 /*********************************************************************
 126  *              _endthreadex (MSVCRT.@)
 127  */
 128 void _endthreadex(
 129   unsigned int retval) /* [in] Thread exit code */
 130 {
 131   TRACE("(%d)\n", retval);
 132
 133   /* FIXME */
 134   ExitThread(retval);
 135 }