148 lines
3.0 KiB
C++
148 lines
3.0 KiB
C++
/* cygserver_shm.h: Single unix specification IPC interface for Cygwin.
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Copyright 2002 Red Hat, Inc.
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Written by Conrad Scott <conrad.scott@dsl.pipex.com>.
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Based on code by Robert Collins <robert.collins@hotmail.com>.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef __CYGSERVER_SHM_H__
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#define __CYGSERVER_SHM_H__
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#include <sys/types.h>
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#include <cygwin/shm.h>
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#include <assert.h>
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#include <limits.h>
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#include "cygserver_ipc.h"
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#include "cygwin/cygserver.h"
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/*---------------------------------------------------------------------------*
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* Values for the shminfo entries.
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*
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* Nb. The values are segregated between two enums so that the `small'
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* values aren't promoted to `unsigned long' equivalents.
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*---------------------------------------------------------------------------*/
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enum
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{
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SHMMAX = ULONG_MAX,
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SHMSEG = ULONG_MAX,
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SHMALL = ULONG_MAX
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};
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enum
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{
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SHMMIN = 1,
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SHMMNI = IPCMNI // Must be <= IPCMNI.
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};
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/*---------------------------------------------------------------------------*
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* class client_request_shm
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*---------------------------------------------------------------------------*/
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#ifndef __INSIDE_CYGWIN__
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class transport_layer_base;
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class process_cache;
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#endif
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class client_request_shm : public client_request
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{
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friend class client_request;
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public:
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enum shmop_t
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{
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SHMOP_shmat,
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SHMOP_shmctl,
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SHMOP_shmdt,
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SHMOP_shmget
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};
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#ifdef __INSIDE_CYGWIN__
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client_request_shm (int shmid, int shmflg); // shmat
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client_request_shm (int shmid, int cmd, const struct shmid_ds *); // shmctl
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client_request_shm (int shmid); // shmdt
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client_request_shm (key_t, size_t, int shmflg); // shmget
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#endif
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// Accessors for out parameters.
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int shmid () const
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{
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assert (!error_code ());
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return _parameters.out.shmid;
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}
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HANDLE hFileMap () const
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{
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assert (!error_code ());
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return _parameters.out.hFileMap;
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}
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const struct shmid_ds & ds () const
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{
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assert (!error_code ());
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return _parameters.out.ds;
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}
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const struct shminfo & shminfo () const
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{
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assert (!error_code ());
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return _parameters.out.shminfo;
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}
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const struct shm_info & shm_info () const
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{
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assert (!error_code ());
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return _parameters.out.shm_info;
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}
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private:
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union
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{
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struct
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{
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shmop_t shmop;
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key_t key;
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size_t size;
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int shmflg;
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int shmid;
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int cmd;
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pid_t cygpid;
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DWORD winpid;
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uid_t uid;
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gid_t gid;
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struct shmid_ds ds;
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} in;
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struct {
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int shmid;
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union
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{
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HANDLE hFileMap;
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struct shmid_ds ds;
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struct shminfo shminfo;
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struct shm_info shm_info;
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};
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} out;
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} _parameters;
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#ifndef __INSIDE_CYGWIN__
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client_request_shm ();
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#endif
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#ifndef __INSIDE_CYGWIN__
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virtual void serve (transport_layer_base *, process_cache *);
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#endif
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};
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#endif /* __CYGSERVER_SHM_H__ */
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