/* Copyright (C) 2000-2002 Lavtech.com corp. All rights reserved.

   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; either version 2 of the License, or
   (at your option) any later version.

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
*/

#ifndef _UDM_MUTEX_H
#define _UDM_MUTEX_H


#ifdef WIN32

#define udm_mutex_t		CRITICAL_SECTION
#define InitMutex(x)		InitializeCriticalSection(x)
#define DestroyMutex(x)		DeleteCriticalSection(x)
#define UDM_MUTEX_LOCK(x)	EnterCriticalSection(x)
#define UDM_MUTEX_UNLOCK(x)	LeaveCriticalSection(x)
#else
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_PTHREAD
#include <pthread.h>
#define udm_mutex_t		pthread_mutex_t
#define InitMutex(x)		pthread_mutex_init(x,NULL)
#define DestroyMutex(x)		pthread_mutex_destroy(x)
#define UDM_MUTEX_LOCK(x)	pthread_mutex_lock(x)
#define UDM_MUTEX_UNLOCK(x)	pthread_mutex_unlock(x)
#else
#define udm_mutex_t		int
#define InitMutex(x)		*(x)=0
#define DestroyMutex(x)
#define UDM_MUTEX_LOCK(x)
#define UDM_MUTEX_UNLOCK(x)
#endif
#endif

typedef struct {
  int handle;
  int cnt;
  udm_mutex_t mutex;
} UDM_MUTEX;


/* MUTEX stuff to lock dangerous places in multi-threaded mode */

extern __C_LINK int __UDMCALL UdmSetLockProc(UDM_ENV * Conf,
		void (*proc)(UDM_AGENT *A,int command,int type,const char *fname,int lineno));
extern __C_LINK void __UDMCALL UdmLockProc(UDM_AGENT *A, int command, int type, const char *fn, int ln);

extern __C_LINK void __UDMCALL UdmInitMutexes(void);
extern __C_LINK void __UDMCALL UdmDestroyMutexes(void);

#ifdef WIN32
extern __C_LINK udm_mutex_t ThreadProcLock;
#endif

#define UDM_GETLOCK(A,mutex)		if(A->Conf->LockProc)A->Conf->LockProc(A,UDM_LOCK,mutex,__FILE__,__LINE__)
#define UDM_RELEASELOCK(A,mutex)	if(A->Conf->LockProc)A->Conf->LockProc(A,UDM_UNLOCK,mutex,__FILE__,__LINE__)

/* Locking commands */
#define UDM_LOCK		1
#define UDM_UNLOCK		2


#endif
