#ifndef __SHM_LOADED
#define __SHM_LOADED
/****************************************************************************
**
**  <shm.h> - System V shared memory system calls
**
*****************************************************************************
**                                                                          *
** HPE CONFIDENTIAL. This software is confidential proprietary software     *
** licensed by Hewlett Packard Enterprise Development, LP, and is not       *
** authorized to be used, duplicated or disclosed to anyone without the     *
** prior written permission of HPE.                                         *
** Copyright 2012 Hewlett Packard Enterprise Development, LP                *
**                                                                          *
** VMS SOFTWARE, INC. CONFIDENTIAL. This software is confidential           *
** proprietary software licensed by VMS Software, Inc., and is not          *
** authorized to be used, duplicated or disclosed to anyone without         *
** the prior written permission of VMS Software, Inc.                       *
** Copyright 2022 VMS Software, Inc.                                        *
**                                                                          *
****************************************************************************/

#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 <ipc.h>

#if !defined __PID_T  && !defined _DECC_V4_SOURCE
#   define __PID_T 1
    typedef __pid_t pid_t;
#endif
#if defined _XOPEN_SOURCE || !defined _POSIX_C_SOURCE
#   ifndef __TIME_T
#       define __TIME_T 1
#ifdef __NAMESPACE_STD
namespace std {
#endif
     typedef __time_t time_t;
#ifdef __NAMESPACE_STD
} /* namespace std */
     using std::time_t;
#endif
#   endif
#endif

#if !defined __SIZE_T  && !defined _DECC_V4_SOURCE
#   define __SIZE_T 1
#ifdef __NAMESPACE_STD
namespace std {
#endif
    typedef __size_t size_t;
#ifdef __NAMESPACE_STD
} /* namespace std */
    using std::size_t;
#endif
#endif

/* Flags for `shmat'.  */
#define SHM_RDONLY      010000          /* attach read-only else read-write */
#define SHM_RND         020000          /* round attach address to SHMLBA */

/* Segment low boundary address multiple. */
#define SHMLBA		0X2000

/* Type to count number of attaches. */
#if defined(__clang__)
    typedef unsigned int shmatt_t;
#else
    typedef unsigned long shmatt_t;
#endif

/*data structure used to store shared memory details*/ 
struct shmid_ds {
	struct 	ipc_perm shm_perm;		/*permissions structure*/
	size_t 	shm_segsz;			/*size of memory segment in bytes*/
	pid_t 	shm_lpid;			/*Process ID of last memory operation*/
	pid_t 	shm_cpid;			/*Process ID of segment creator*/
	shmatt_t   shm_nattch;			/*Number of current attaches*/
	time_t	shm_atime;			/*time of last shmat()*/
	time_t	shm_dtime;			/*time of last shmdt()*/ 
	time_t	shm_ctime;			/*time of last change */
};

/* shared memory get operation */
int shmget(key_t key, size_t size, int shmflg);

/* shared memory attach operation */
void *shmat(int shmid, const void *shmaddr, int shmflg);

/* shared memory control operations */
int shmctl(int shmid, int cmd, struct shmid_ds *buf);

/* shared memory detach operations */
int shmdt(const void *shmaddr);

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

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