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/* cygserver_shm.h: Single unix specification IPC interface for Cygwin.
Copyright 2001, 2002, 2003, 2005, 2008 Red Hat, Inc.
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. */
#ifndef __CYGSERVER_SHM_H__
#define __CYGSERVER_SHM_H__
#include <sys/types.h>
#include <sys/sysproto.h>
#ifndef _KERNEL
#define _KERNEL 1
#endif
#include <cygwin/shm.h>
#include "cygserver.h"
#include "cygserver_ipc.h"
#ifndef __INSIDE_CYGWIN__
class transport_layer_base;
class process_cache;
#endif
class client_request_shm : public client_request
{
friend class client_request;
public:
enum shmop_t
{
SHMOP_shmat,
SHMOP_shmctl,
SHMOP_shmdt,
SHMOP_shmget,
SHMOP_shmfork /* Called on fixup_after_fork */
};
private:
union
{
struct
{
shmop_t shmop;
proc ipcblk;
struct shmat_args atargs;
struct shmctl_args ctlargs;
struct shmdt_args dtargs;
struct shmget_args getargs;
struct proc forkargs;
} in;
struct {
union {
int ret;
vm_offset_t ptr;
};
vm_object_t obj;
} out;
} _parameters;
#ifndef __INSIDE_CYGWIN__
client_request_shm ();
virtual void serve (transport_layer_base *, process_cache *);
#endif
public:
#ifdef __INSIDE_CYGWIN__
client_request_shm (int, const void *, int); // shmat
client_request_shm (int, int, struct shmid_ds *); // shmctl
client_request_shm (const void *); // shmdt
client_request_shm (key_t, size_t, int); // shmget
client_request_shm (proc *); // shmfork
#endif
int retval () const { return msglen () ? _parameters.out.ret : -1; }
void *ptrval () const { return (void *)_parameters.out.ptr; }
vm_object_t objval () const { return _parameters.out.obj; }
};
#ifndef __INSIDE_CYGWIN__
void shminit ();
int shmunload ();
void shmexit_myhook (struct vmspace *vm);
int cygwin_shmfork_myhook (struct thread *, struct proc *);
int shmat (struct thread *, struct shmat_args *);
int shmctl (struct thread *, struct shmctl_args *);
int shmdt (struct thread *, struct shmdt_args *);
int shmget (struct thread *, struct shmget_args *);
#endif
#endif /* __CYGSERVER_SHM_H__ */
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