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129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
/* Copyright (C) Yuri Dario & 2000 MySQL AB
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All the above parties has a full, independent copyright to
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the following code, including the right to use the code in
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any manner without any demands from the other parties.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA */
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/*****************************************************************************
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** Simulation of posix threads calls for OS/2
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*****************************************************************************/
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#include "mysys_priv.h"
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#if defined(THREAD) && defined(OS2)
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#include <m_string.h>
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#include <process.h>
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static pthread_mutex_t THR_LOCK_thread;
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struct pthread_map
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{
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HANDLE pthreadself;
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pthread_handler func;
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void * param;
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};
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void win_pthread_init(void)
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{
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pthread_mutex_init(&THR_LOCK_thread,NULL);
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}
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/*
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** We have tried to use '_beginthreadex' instead of '_beginthread' here
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** but in this case the program leaks about 512 characters for each
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** created thread !
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** As we want to save the created thread handler for other threads to
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** use and to be returned by pthread_self() (instead of the Win32 pseudo
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** handler), we have to go trough pthread_start() to catch the returned handler
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** in the new thread.
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*/
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pthread_handler_t pthread_start(void *param)
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{
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DBUG_ENTER("pthread_start");
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pthread_handler func=((struct pthread_map *) param)->func;
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void *func_param=((struct pthread_map *) param)->param;
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my_thread_init(); /* Will always succeed in windows */
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pthread_mutex_lock(&THR_LOCK_thread); /* Wait for beginthread to return */
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win_pthread_self=((struct pthread_map *) param)->pthreadself;
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pthread_mutex_unlock(&THR_LOCK_thread);
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free((char*) param); /* Free param from create */
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/* pthread_exit((void*) (*func)(func_param)); */
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(*func)(func_param);
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DBUG_RETURN(0);
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}
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int pthread_create(pthread_t *thread_id, pthread_attr_t *attr,
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pthread_handler func, void *param)
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{
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HANDLE hThread;
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struct pthread_map *map;
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DBUG_ENTER("pthread_create");
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if (!(map=(struct pthread_map *)malloc(sizeof(*map))))
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DBUG_RETURN(-1);
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map->func=func;
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map->param=param;
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pthread_mutex_lock(&THR_LOCK_thread);
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#ifdef __BORLANDC__
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hThread=(HANDLE)_beginthread((void(_USERENTRY *)(void *)) pthread_start,
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attr->dwStackSize ? attr->dwStackSize :
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65535, (void*) map);
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#elif defined( OS2)
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hThread=(HANDLE)_beginthread((void( _Optlink *)(void *)) pthread_start, NULL,
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attr->dwStackSize ? attr->dwStackSize :
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65535, (void*) map);
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#else
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hThread=(HANDLE)_beginthread((void( __cdecl *)(void *)) pthread_start,
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attr->dwStackSize ? attr->dwStackSize :
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65535, (void*) map);
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#endif
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DBUG_PRINT("info", ("hThread=%lu",(long) hThread));
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*thread_id=map->pthreadself=hThread;
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pthread_mutex_unlock(&THR_LOCK_thread);
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if (hThread == (HANDLE) -1)
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{
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int error=errno;
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DBUG_PRINT("error",
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("Can't create thread to handle request (error %d)",error));
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DBUG_RETURN(error ? error : -1);
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}
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#ifdef OS2
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my_pthread_setprio(hThread, attr->priority);
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#else
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VOID(SetThreadPriority(hThread, attr->priority)) ;
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#endif
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DBUG_RETURN(0);
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}
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void pthread_exit(void *a)
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{
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_endthread();
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}
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/* This is neaded to get the macro pthread_setspecific to work */
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int win_pthread_setspecific(void *a,void *b,uint length)
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{
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memcpy(a,b,length);
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return 0;
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}
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#endif
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