////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002 Xilinx, Inc.  All rights reserved.
//
// Xilinx, Inc.
// XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS" AS A 
// COURTESY TO YOU.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION AS
// ONE POSSIBLE   IMPLEMENTATION OF THIS FEATURE, APPLICATION OR 
// STANDARD, XILINX IS MAKING NO REPRESENTATION THAT THIS IMPLEMENTATION
// IS FREE FROM ANY CLAIMS OF INFRINGEMENT, AND YOU ARE RESPONSIBLE 
// FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE FOR YOUR IMPLEMENTATION.  
// XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO 
// THE ADEQUACY OF THE IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO 
// ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE 
// FROM CLAIMS OF INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE.
// 
// Date   : 2002, November.
// Author : Raj Nagarajan (rajn@xilinx.com)
// Company: Xilinx
// Group  : Emerging Software Technologies
//
// $Id :$
//
//////////////////////////////////////////////////////////////////////////////

/***************************************************************************/
/**
 * @file sema.h 
 *
 * This contains the function decleration for Semephore routines.
 ***************************************************************************/
#ifndef _SEMA_H
#define _SEMA_H

#include <os_config.h>
#include <config_param.h>
#include <sys/queue.h>


typedef struct _semaphore semaphore ;

/**
 * Each semaphore is associated with this structure.
 */
struct _semaphore {
	signed char  sema_id ;		/**< Semaphore ID */
	signed char  count ;		/**< Resource count */
	struct _queue wait_q ;		/**< Queue of waiting processes */
} ;
		
/*
 * Function prototypes defined in sys/sema.c
 */
void sem_heap_init() ;
int sys_sem_init( semaphore **sema, int count ) ;
int sys_sem_wait( semaphore *sema ) ;
int sys_sem_trywait( semaphore *sema ) ;
int sys_sem_post( semaphore *sema ) ;
int sys_sem_destroy( semaphore *sema ) ;

#endif
