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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA */
/*****************************************************************************
** Simulation of posix threads calls for WIN95 and NT
*****************************************************************************/
#include "mysys_priv.h"
#if defined(THREAD) && defined(__WIN__)
#include <m_string.h>
#undef getpid
#include <process.h>
extern pthread_mutex_t THR_LOCK_thread;
struct pthread_map
{
HANDLE pthreadself;
pthread_handler func;
void *param;
};
/*
** We have tried to use '_beginthreadex' instead of '_beginthread' here
** but in this case the program leaks about 512 characters for each
** created thread !
** As we want to save the created thread handler for other threads to
** use and to be returned by pthread_self() (instead of the Win32 pseudo
** handler), we have to go trough pthread_start() to catch the returned handler
** in the new thread.
*/
static pthread_handler_decl(pthread_start,param)
{
pthread_handler func=((struct pthread_map *) param)->func;
void *func_param=((struct pthread_map *) param)->param;
my_thread_init();
pthread_mutex_lock(&THR_LOCK_thread); /* Wait for beingthread to return */
win_pthread_self=((struct pthread_map *) param)->pthreadself;
pthread_mutex_unlock(&THR_LOCK_thread);
free((char*) param);
pthread_exit((*func)(func_param));
return 0;
}
int pthread_create(pthread_t *thread_id, pthread_attr_t *attr,
pthread_handler func, void *param)
{
HANDLE hThread;
struct pthread_map *map;
DBUG_ENTER("pthread_create");
if (!(map=malloc(sizeof(*map))))
DBUG_RETURN(-1);
map->func=func;
map->param=param;
pthread_mutex_lock(&THR_LOCK_thread);
#ifdef __BORLANDC__
hThread=(HANDLE)_beginthread((void(_USERENTRY *)(void *)) pthread_start,
attr->dwStackSize ? attr->dwStackSize :
65535, (void*) map);
#else
hThread=(HANDLE)_beginthread(pthread_start,
attr->dwStackSize ? attr->dwStackSize :
65535, (void*) map);
#endif
DBUG_PRINT("info", ("hThread=%lu",(long) hThread));
*thread_id=map->pthreadself=hThread;
pthread_mutex_unlock(&THR_LOCK_thread);
if (hThread == (HANDLE) -1)
{
int error=errno;
DBUG_PRINT("error",
("Can't create thread to handle request (error %d)",error));
DBUG_RETURN(error ? error : -1);
}
VOID(SetThreadPriority(hThread, attr->priority)) ;
DBUG_RETURN(0);
}
void pthread_exit(unsigned A)
{
_endthread();
}
/* This is neaded to get the macro pthread_setspecific to work */
int win_pthread_setspecific(void *a,void *b,uint length)
{
memcpy(a,b,length);
return 0;
}
#endif
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