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