Quelle  pthread-win32.c

/*-------------------------------------------------------------------------
*
* pthread-win32.c
*  partial pthread implementation for win32
*
* Copyright (c) 2004-2025, PostgreSQL Global Development Group
* IDENTIFICATION
* src/interfaces/libpq/pthread-win32.c
*
*-------------------------------------------------------------------------
*/

#include "postgres_fe.h"

#include "pthread-win32.h"

DWORD
pthread_self(void)
{
 return GetCurrentThreadId();
}

void
pthread_setspecific(pthread_key_t key, void *val)
{
}

void *
pthread_getspecific(pthread_key_t key)
{
 return NULL;
}

int
pthread_mutex_init(pthread_mutex_t *mp, void *attr)
{
 mp->initstate = 0;
 return 0;
}

int
pthread_mutex_lock(pthread_mutex_t *mp)
{
 /* Initialize the csection if not already done */
 if (mp->initstate != 1)
 {
  LONG  istate;

  while ((istate = InterlockedExchange(&mp->initstate, 2)) == 2)
   Sleep(0);   /* wait, another thread is doing this */
  if (istate != 1)
   InitializeCriticalSection(&mp->csection);
  InterlockedExchange(&mp->initstate, 1);
 }
 EnterCriticalSection(&mp->csection);
 return 0;
}

int
pthread_mutex_unlock(pthread_mutex_t *mp)
{
 if (mp->initstate != 1)
  return EINVAL;
 LeaveCriticalSection(&mp->csection);
 return 0;
}