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/*
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/C++ is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
MySQL Connectors. There are special exceptions to the terms and
conditions of the GPLv2 as it is applied to this software, see the
FLOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; version 2 of the License.
This program 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*****************************************************************************
** Simulation of posix threads calls for Windows
*****************************************************************************/
#if defined (_WIN32)
/* SAFE_MUTEX will not work until the thread structure is up to date */
#undef SAFE_MUTEX
#include <my_global.h>
#include "my_pthread.h"
#include <process.h>
#include <signal.h>
// re-defining calls to debug functions from libmysql
#ifdef DBUG_PRINT
#undef DBUG_PRINT
#endif
#define DBUG_PRINT(keyword, argslist)
#ifdef DBUG_ENTER
#undef DBUG_ENTER
#endif
#define DBUG_ENTER(p)
#ifdef DBUG_RETURN
#undef DBUG_RETURN
#endif
#define DBUG_RETURN(a1) return(a1)
static void install_sigabrt_handler(void);
struct thread_start_parameter
{
pthread_handler func;
void *arg;
};
/**
Adapter to @c pthread_mutex_trylock()
@retval 0 Mutex was acquired
@retval EBUSY Mutex was already locked by a thread
*/
int
win_pthread_mutex_trylock(pthread_mutex_t *mutex)
{
if (TryEnterCriticalSection(mutex))
{
/* Don't allow recursive lock */
if (mutex->RecursionCount > 1){
LeaveCriticalSection(mutex);
return EBUSY;
}
return 0;
}
return EBUSY;
}
static unsigned int __stdcall pthread_start(void *p)
{
struct thread_start_parameter *par= (struct thread_start_parameter *)p;
pthread_handler func= par->func;
void *arg= par->arg;
free(p);
(*func)(arg);
return 0;
}
int pthread_create(pthread_t *thread_id, pthread_attr_t *attr,
pthread_handler func, void *param)
{
uintptr_t handle;
struct thread_start_parameter *par;
unsigned int stack_size;
DBUG_ENTER("pthread_create");
par= (struct thread_start_parameter *)malloc(sizeof(*par));
if (!par)
goto error_return;
par->func= func;
par->arg= param;
stack_size= attr?attr->dwStackSize:0;
handle= _beginthreadex(NULL, stack_size , pthread_start, par, 0, thread_id);
if (!handle)
goto error_return;
DBUG_PRINT("info", ("thread id=%u",*thread_id));
/* Do not need thread handle, close it */
CloseHandle((HANDLE)handle);
DBUG_RETURN(0);
error_return:
DBUG_PRINT("error",
("Can't create thread to handle request (error %d)",errno));
DBUG_RETURN(-1);
}
void pthread_exit(void *a)
{
_endthreadex(0);
}
int pthread_join(pthread_t thread, void **value_ptr)
{
DWORD ret;
HANDLE handle;
handle= OpenThread(SYNCHRONIZE, FALSE, thread);
if (!handle)
{
errno= EINVAL;
goto error_return;
}
ret= WaitForSingleObject(handle, INFINITE);
if(ret != WAIT_OBJECT_0)
{
errno= EINVAL;
goto error_return;
}
CloseHandle(handle);
return 0;
error_return:
if(handle)
CloseHandle(handle);
return -1;
}
#endif
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