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Antz 2020-02-17 09:19:44 +00:00
parent a0797532e8
commit 1997c1e903
3106 changed files with 11118 additions and 627576 deletions
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121
dep/acelite/ace/SV_Shared_Memory.h
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// -*- C++ -*-
//==========================================================================
/**
* @file SV_Shared_Memory.h
*
* $Id: SV_Shared_Memory.h 80826 2008-03-04 14:51:23Z wotte $
*
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
*/
//==========================================================================
#ifndef ACE_SV_SHARED_MEMORY_H
#define ACE_SV_SHARED_MEMORY_H
#include /**/ "ace/pre.h"
#include /**/ "ace/ACE_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#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_Shared_Memory
*
* @brief This is a wrapper for System V shared memory.
*/
class ACE_Export ACE_SV_Shared_Memory
{
public:
enum
{
ACE_CREATE = IPC_CREAT,
ACE_OPEN = 0
};
// = Initialization and termination methods.
ACE_SV_Shared_Memory (void);
ACE_SV_Shared_Memory (key_t external_id,
size_t size,
int create,
int perms = ACE_DEFAULT_FILE_PERMS,
void *virtual_addr = 0,
int flags = 0);
ACE_SV_Shared_Memory (ACE_HANDLE internal_id,
int flags = 0);
int open (key_t external_id,
size_t size,
int create = ACE_SV_Shared_Memory::ACE_OPEN,
int perms = ACE_DEFAULT_FILE_PERMS);
int open_and_attach (key_t external_id,
size_t size,
int create = ACE_SV_Shared_Memory::ACE_OPEN,
int perms = ACE_DEFAULT_FILE_PERMS,
void *virtual_addr = 0,
int flags = 0);
/// Attach this shared memory segment.
int attach (void *virtual_addr = 0, int flags = 0);
/// Detach this shared memory segment.
int detach (void);
/// Remove this shared memory segment.
int remove (void);
/// Forward to underlying System V <shmctl>.
int control (int cmd, void *buf);
// = Segment-related info.
void *get_segment_ptr (void) const;
size_t get_segment_size (void) const;
/// Return the ID of the shared memory segment (i.e., an ACE_HANDLE).
ACE_HANDLE get_id (void) const;
/// Dump the state of an object.
void dump (void) const;
/// Declare the dynamic allocation hooks.
ACE_ALLOC_HOOK_DECLARE;
protected:
enum
{
/// Most restrictive alignment.
ALIGN_WORDB = 8
};
/// Internal identifier.
ACE_HANDLE internal_id_;
/// Size of the mapped segment.
size_t size_;
/// Pointer to the beginning of the segment.
void *segment_ptr_;
/// Round up to an appropriate page size.
size_t round_up (size_t len);
};
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/SV_Shared_Memory.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_SV_SHARED_MEMORY_H */