#ifndef __SEMAPHORE_LOADED
#define __SEMAPHORE_LOADED
/****************************************************************************
**
**  <semaphore.h> - POSIX semaphore system calls
**
*****************************************************************************
**                                                                       
**   Copyright 2009 Hewlett-Packard Development Company, L.P.            
**                                                                       
** Confidential computer software.  Valid license from HP and/or         
** its subsidiaries required for possession, use, or copying.            
**                                                                       
** Consistent with FAR 12.211 and 12.212, Commercial Computer Software,  
** Computer Software Documentation, and Technical Data for Commercial    
** Items are licensed to the U.S. Government under vendor's standard     
** commercial license.                                                   
**                                                                       
** Neither HP nor any of its subsidiaries shall be liable for technical  
** or editorial errors or omissions contained herein.  The information   
** in this document is provided "as is" without warranty of any kind and 
** is subject to change without notice.  The warranties for HP products  
** are set forth in the express limited warranty statements accompanying 
** such products.  Nothing herein should be construed as constituting an 
** additional warranty.                                                  
**                                                                       
*****************************************************************************
*/

#pragma __nostandard 
#include <decc$types.h>
#ifdef __cplusplus
    extern "C" {
#endif

#if __INITIAL_POINTER_SIZE
#   pragma __pointer_size __save
#   pragma __pointer_size 64
#endif

#include <fcntl.h>
#include <types.h>
#include <limits.h>

/* Constants definition */

#define SEM_FAILED ((sem_t *)-1)
#define PSEM_MAX_PATHNAME 256
#define PSEM_MAX_SECNAME 256
#define SEM_VALUE_MAX INT_MAX


/* Data structure describing a semaphores.  */
typedef struct 
{
	unsigned int __unused1;		 // padding
	char	signature[24];		 /* used internally */
	int     sem_named_flag;    	 /* 1 = named semaphore */
	int     wait_count;		 /* used for unnamed semaphroes */
	unsigned int	sem_value;	 /* semaphore value (used only in case of unnamed semaphore) */
	void	*sem_internal_ptr;	 /* pointer to the internal semaphore struct 
					    (used only in case of named semaphores) */
	unsigned int __unused2;		 // padding
}sem_t; 


/* Open a named semaphore */
sem_t *sem_open (const char *name, int oflag, ...);
 	
/* Remove the name of the semaphore */
int sem_unlink (const char *name);

/* close the semaphore opened through sem_open */
int sem_close (sem_t *sem);

/* Initialize the specified semaphore */
int sem_init (sem_t *sem, int pshared, unsigned value);

/* Remove the semaphore */
int 	sem_destroy (sem_t *sem);

/* Lock the semaphore (blocking) */
int 	sem_wait (sem_t *sem);
 	
/* Lock the specified semaphore (non-blocking) */
int 	sem_trywait (sem_t *sem);

/* Wait for semaphore (blocking with timeout) */
int 	sem_timedwait (sem_t *sem,  struct timespec *  abs_timeout);
 	
/* Unlock the specified semaphore */
int 	sem_post (sem_t *sem);
	
/* Get the semaphore value */
int 	sem_getvalue (sem_t *sem, int *sval);
 		

/*
**  Restore the users pointer context
*/
#if __INITIAL_POINTER_SIZE
#   pragma __pointer_size __restore
#endif

#ifdef __cplusplus
    }
#endif
#pragma __standard
#endif  /* __SEMAPHORE_LOADED */