php-src/ext/mysql/libmysql/my_wincond.c

/* Copyright (C) 2000 Monty Program KB

   This software is distributed with NO WARRANTY OF ANY KIND.  No author or
   distributor accepts any responsibility for the consequences of using it, or
   for whether it serves any particular purpose or works at all, unless he or
   she says so in writing.  Refer to the Free Public License (the "License")
   for full details.

   Every copy of this file must include a copy of the License, normally in a
   plain ASCII text file named PUBLIC.	The License grants you the right to
   copy, modify and redistribute this file, but only under certain conditions
   described in the License.  Among other things, the License requires that
   the copyright notice and this notice be preserved on all copies. */


/*****************************************************************************
** The following is a simple implementation of posix conditions
*****************************************************************************/

#include "mysys_priv.h"
#if defined(THREAD) && defined(__WIN32__)
#include <m_string.h>
#undef getpid
#include <process.h>
#include <sys/timeb.h>

int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
{
  cond->waiting=0;
  cond->semaphore=CreateSemaphore(NULL,0,0x7FFFFFFF,NullS);
  if (!cond->semaphore)
    return ENOMEM;
  return 0;
}

int pthread_cond_destroy(pthread_cond_t *cond)
{
	return CloseHandle(cond->semaphore) ? 0 : EINVAL;
}


int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
{
  InterlockedIncrement(&cond->waiting);
  LeaveCriticalSection(mutex);
  WaitForSingleObject(cond->semaphore,INFINITE);
  InterlockedDecrement(&cond->waiting);
  EnterCriticalSection(mutex);
  return 0 ;
}

int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
                           struct timespec *abstime)
{
  struct _timeb curtime;
  int result;
  long timeout;
  _ftime(&curtime);
  timeout= ((long) (abstime->tv_sec - curtime.time)*1000L +
		    (long)((abstime->tv_nsec/1000) - curtime.millitm)/1000L);
  if (timeout < 0)				/* Some safety */
    timeout = 0L;
  InterlockedIncrement(&cond->waiting);
  LeaveCriticalSection(mutex);
  result=WaitForSingleObject(cond->semaphore,timeout);
  InterlockedDecrement(&cond->waiting);
  EnterCriticalSection(mutex);

  return result == WAIT_TIMEOUT ? ETIMEDOUT : 0;
}


int pthread_cond_signal(pthread_cond_t *cond)
{
  long prev_count;
  if (cond->waiting)
    ReleaseSemaphore(cond->semaphore,1,&prev_count);
  return 0;
}


int pthread_cond_broadcast(pthread_cond_t *cond)
{
  long prev_count;
  if (cond->waiting)
    ReleaseSemaphore(cond->semaphore,cond->waiting,&prev_count);
  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 /* __WIN32__ */