reactos/posix/include/sys/shm.h

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/* $Id: shm.h,v 1.5 2002/10/29 04:45:21 rex Exp $
*/
/*
* sys/shm.h
*
* shared memory facility. Conforming to the Single UNIX(r) Specification
* Version 2, System Interface & Headers Issue 5
*
* This file is part of the ReactOS Operating System.
*
* Contributors:
* Created by KJK::Hyperion <noog@libero.it>
*
* THIS SOFTWARE IS NOT COPYRIGHTED
*
* This source code is offered for use in the public domain. You may
* use, modify or distribute it freely.
*
* This code is distributed in the hope that it will be useful but
* WITHOUT ANY WARRANTY. ALL WARRANTIES, EXPRESS OR IMPLIED ARE HEREBY
* DISCLAMED. This includes but is not limited to warranties of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
*/
#ifndef __SYS_SHM_H_INCLUDED__
#define __SYS_SHM_H_INCLUDED__
/* INCLUDES */
/* OBJECTS */
/* TYPES */
typedef unsigned short shmatt_t;
struct shmid_ds
{
struct ipc_perm shm_perm; /* operation permission structure */
size_t shm_segsz; /* size of segment in bytes */
pid_t shm_lpid; /* process ID of last shared memory operation */
pid_t shm_cpid; /* process ID of 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 by shmctl() */
};
/* CONSTANTS */
#define SHM_RDONLY (0x00000200) /* Attach read-only (else read-write). */
#define SHM_RND (0x00000400) /* Round attach address to SHMLBA. */
#define SHMLBA (4096) /* Segment low boundary address multiple. */
/* PROTOTYPES */
void *shmat(int, const void *, int);
int shmctl(int, int, struct shmid_ds *);
int shmdt(const void *);
int shmget(key_t, size_t, int);
/* MACROS */
#endif /* __SYS_SHM_H_INCLUDED__ */
/* EOF */