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/* sys/shm.h
Copyright 2001 Red Hat Inc.
Written by Robert Collins <rbtcollins@hotmail.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifdef __cplusplus
extern "C"
{
#endif
#ifndef _SYS_SHM_H
#define _SYS_SHM_H
#include <sys/ipc.h>
#define SHM_RDONLY 1
/* 64 Kb was hardcoded for x86. MS states this may change, but we need it in the header
* file.
*/
#define SHMLBA 65536
#define SHM_RND 1
typedef long int shmatt_t;
#if defined(__INSIDE_CYGWIN__) && defined(__cplusplus)
class _shmattach {
public:
void *data;
int shmflg;
class _shmattach *next;
};
class shmid_ds {
public:
struct ipc_perm shm_perm;
size_t shm_segsz;
pid_t shm_lpid;
pid_t shm_cpid;
shmatt_t shm_nattch;
time_t shm_atime;
time_t shm_dtime;
time_t shm_ctime;
void *mapptr;
};
class shmnode {
public:
class shmid_ds * shmds;
int shm_id;
class shmnode *next;
key_t key;
HANDLE filemap;
HANDLE attachmap;
class _shmattach *attachhead;
};
#else
/* this is what we return when queried. It has no bitwise correspondence
* the internal structures
*/
struct shmid_ds {
struct ipc_perm shm_perm;
size_t shm_segsz;
pid_t shm_lpid;
pid_t shm_cpid;
shmatt_t shm_nattch;
time_t shm_atime;
time_t shm_dtime;
time_t shm_ctime;
};
#endif /* __INSIDE_CYGWIN__ */
void *shmat(int, const void *, int);
int shmctl(int, int, struct shmid_ds *);
int shmdt(const void *);
int shmget(key_t, size_t, int);
#endif /* _SYS_SHM_H */
#ifdef __cplusplus
}
#endif
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