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// -*- C++ -*-
//==========================================================================
/**
* @file SV_Message_Queue.h
*
* @author Douglas C. Schmidt <d.schmidt@vanderbilt.edu>
*/
//===========================================================================
#ifndef ACE_SV_MESSAGE_QUEUE_H
#define ACE_SV_MESSAGE_QUEUE_H
#include /**/ "ace/pre.h"
#include /**/ "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/SV_Message.h"
#include "ace/os_include/sys/os_stat.h"
#include "ace/os_include/sys/os_ipc.h"
#include "ace/Default_Constants.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class ACE_SV_Message_Queue
*
* @brief Defines the header file for the C++ wrapper for System V IPC
* message queues.
*/
class ACE_Export ACE_SV_Message_Queue
{
public:
// = Useful symbolic constants.
enum
{
ACE_CREATE = IPC_CREAT,
ACE_OPEN = 0,
ACE_NOWAIT = IPC_NOWAIT
};
/// Open a message queue using the <external_id>.
ACE_SV_Message_Queue (void);
ACE_SV_Message_Queue (key_t external_id,
int create = ACE_SV_Message_Queue::ACE_OPEN,
int perms = ACE_DEFAULT_FILE_PERMS);
int open (key_t external_id,
int create = ACE_SV_Message_Queue::ACE_OPEN,
int perms = ACE_DEFAULT_FILE_PERMS);
~ACE_SV_Message_Queue (void);
/// Close down this instance of the message queue without removing it
/// from the system.
int close (void);
/// Close down and remove the message queue from the system.
int remove (void);
// = Message transfer methods.
ssize_t recv (ACE_SV_Message &mb,
int length,
long mtype = 0,
int mflags = 0);
int send (const ACE_SV_Message &mb,
int length,
int mflags = 0);
/// Access the underlying control operations.
int control (int option, void *arg = 0);
/// Get the underly internal id.
int get_id () const;
/// Set the underly internal id.
void set_id (int);
/// Dump the state of an object.
void dump () const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
protected:
/// Returned from the underlying <msgget> system call.
int internal_id_;
};
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/SV_Message_Queue.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_SV_MESSAGE_QUEUE_H */
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