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/* cygserver_shm.h
Copyright 2001, 2002 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. */
#include <sys/types.h>
#include <sys/shm.h>
#include "threaded_queue.h"
#include "cygwin/cygserver_process.h"
#include "cygwin/cygserver_transport.h"
#include "cygwin/cygserver.h"
/* Values for the client_request_shm::parameters.in.type field. */
#define SHM_CREATE 0
#define SHM_REATTACH 1
#define SHM_ATTACH 2
#define SHM_DETACH 3
#define SHM_DEL 4
struct _shmattach
{
void *data;
int shmflg;
struct _shmattach *next;
};
struct int_shmid_ds
{
struct shmid_ds ds;
void *mapptr;
};
struct shmnode
{
struct int_shmid_ds *shmds;
int shm_id;
struct shmnode *next;
key_t key;
HANDLE filemap;
HANDLE attachmap;
struct _shmattach *attachhead;
};
class client_request_shm : public client_request
{
public:
#ifdef __INSIDE_CYGWIN__
client_request_shm (key_t ntype, size_t nsize, int shmflg);
client_request_shm (int ntype, int nshmid);
#else
client_request_shm ();
#endif
union
{
struct
{
int type;
pid_t cygpid;
DWORD winpid;
int shm_id;
key_t key;
size_t size;
int shmflg;
char sd_buf[4096]; // Must be the last item (variable length).
} in;
struct
{
int shm_id;
HANDLE filemap;
HANDLE attachmap;
key_t key;
} out;
} parameters;
private:
#ifndef __INSIDE_CYGWIN__
virtual void serve (transport_layer_base *, process_cache *);
#endif
};
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