win-odbc64/security_dll/native/source/StaticLocking.cpp

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//
// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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#include "StaticLocking.h"

// This stores the mutex 
static MUTEX_TYPE* mutex_buf;

void SecurityInitialize(void) throw (SecurityException)
{
	setupMutex();
}

static void setupMutex(void)
{
   mutex_buf = (MUTEX_TYPE*) malloc(sizeof(MUTEX_TYPE));

   if(!mutex_buf)
      throw SecurityException(MEMORY_ALLOC_FAILED, NULL);
   MUTEX_SETUP(*mutex_buf);

}

void getMutex(void)
{
   if (!mutex_buf)
      throw SecurityException(MUTEX_NOT_EXIST, NULL);
   MUTEX_LOCK(mutex_buf);
}      

void releaseMutex(void)
{
   MUTEX_UNLOCK(mutex_buf);    
}

void cleanupMutex(void)
{
#ifdef _WINDOWS
   if (MUTEX_CLEANUP(*mutex_buf) == 0) // ReleaseMutex returns 0 if failed
#else
   if (MUTEX_CLEANUP(mutex_buf) != 0)  // pthread_mutex_destroy returns 0 if successful
#endif
		throw SecurityException(MUTEX_RELEASE_FAILED, NULL);
   free(mutex_buf);
   mutex_buf = NULL;
}