my_os2cond.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
- /* Copyright (C) Yuri Dario & 2000 MySQL AB
- All the above parties has a full, independent copyright to
- the following code, including the right to use the code in
- any manner without any demands from the other parties.
- 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 */
- /*****************************************************************************
- ** The following is a simple implementation of posix conditions
- *****************************************************************************/
- #undef SAFE_MUTEX /* Avoid safe_mutex redefinitions */
- #include "mysys_priv.h"
- #if defined(THREAD) && defined(OS2)
- #include <m_string.h>
- #include <process.h>
- #include <sys/timeb.h>
- int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
- {
- APIRET rc = 0;
- HEV event;
- cond->waiting=0;
- /* Warp3 FP29 or Warp4 FP4 or better required */
- rc = DosCreateEventSem( NULL, &cond->semaphore, 0x0800, 0);
- if (rc)
- return ENOMEM;
- return 0;
- }
- int pthread_cond_destroy(pthread_cond_t *cond)
- {
- APIRET rc;
- do {
- rc = DosCloseEventSem(cond->semaphore);
- if (rc == 301) DosPostEventSem(cond->semaphore);
- } while (rc == 301);
- if (rc)
- return EINVAL;
- return 0;
- }
- int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
- {
- APIRET rc;
- int rval;
- rval = 0;
- cond->waiting++;
- if (mutex) pthread_mutex_unlock(mutex);
- rc = DosWaitEventSem(cond->semaphore,SEM_INDEFINITE_WAIT);
- if (rc != 0)
- rval = EINVAL;
- if (mutex) pthread_mutex_lock(mutex);
- cond->waiting--;
- return rval;
- }
- int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
- struct timespec *abstime)
- {
- struct timeb curtime;
- int result;
- long timeout;
- APIRET rc;
- int rval;
- _ftime(&curtime);
- timeout= ((long) (abstime->ts_sec - curtime.time)*1000L +
- (long)((abstime->ts_nsec/1000) - curtime.millitm)/1000L);
- if (timeout < 0) /* Some safety */
- timeout = 0L;
- rval = 0;
- cond->waiting++;
- if (mutex) pthread_mutex_unlock(mutex);
- rc = DosWaitEventSem(cond->semaphore, timeout);
- if (rc != 0)
- rval = ETIME;
- if (mutex) pthread_mutex_lock(mutex);
- cond->waiting--;
- return rval;
- }
- int pthread_cond_signal(pthread_cond_t *cond)
- {
- APIRET rc;
- /* Bring the next thread off the condition queue: */
- rc = DosPostEventSem(cond->semaphore);
- return 0;
- }
- int pthread_cond_broadcast(pthread_cond_t *cond)
- {
- int i;
- APIRET rc;
- /*
- * Enter a loop to bring all threads off the
- * condition queue:
- */
- i = cond->waiting;
- while (i--) rc = DosPostEventSem(cond->semaphore);
- return 0 ;
- }
- int pthread_attr_init(pthread_attr_t *connect_att)
- {
- connect_att->dwStackSize = 0;
- connect_att->dwCreatingFlag = 0;
- connect_att->priority = 0;
- return 0;
- }
- int pthread_attr_setstacksize(pthread_attr_t *connect_att,DWORD stack)
- {
- connect_att->dwStackSize=stack;
- return 0;
- }
- int pthread_attr_setprio(pthread_attr_t *connect_att,int priority)
- {
- connect_att->priority=priority;
- return 0;
- }
- int pthread_attr_destroy(pthread_attr_t *connect_att)
- {
- bzero((gptr) connect_att,sizeof(*connect_att));
- return 0;
- }
- /****************************************************************************
- ** Fix localtime_r() to be a bit safer
- ****************************************************************************/
- struct tm *localtime_r(const time_t *timep,struct tm *tmp)
- {
- if (*timep == (time_t) -1) /* This will crash win32 */
- {
- bzero(tmp,sizeof(*tmp));
- }
- else
- {
- struct tm *res=localtime(timep);
- if (!res) /* Wrong date */
- {
- bzero(tmp,sizeof(*tmp)); /* Keep things safe */
- return 0;
- }
- *tmp= *res;
- }
- return tmp;
- }
- #endif /* __WIN__ */