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// -*- C++ -*-
//=============================================================================
/**
* @file MMAP_Allocator.h
*
* $Id$
*
* @author Ossama Othman <ossama@dre.vanderbilt.edu>
*/
//=============================================================================
#ifndef TAO_MMAP_ALLOCATOR_H
#define TAO_MMAP_ALLOCATOR_H
#include /**/ "ace/pre.h"
#include "tao/orbconf.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if TAO_HAS_SENDFILE == 1
#include "ace/Malloc_T.h"
#include "ace/MMAP_Memory_Pool.h"
#include "ace/Thread_Mutex.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
// An ACE_Lite_MMAP_Memory_Pool is used since sync()ing is not
// needed. All memory allocated by the TAO_MMAP_Allocator is meant
// for strictly transient data, not persistent.
typedef ACE_Allocator_Adapter <ACE_Malloc<ACE_LITE_MMAP_MEMORY_POOL, TAO_SYNCH_MUTEX> > TAO_MMAP_Allocator_Base;
/**
* @class TAO_MMAP_Allocator
*
* @brief mmap-based allocator.
*
* This class utilizes and
*/
class TAO_MMAP_Allocator
: public TAO_MMAP_Allocator_Base
{
public:
/// Constructor
TAO_MMAP_Allocator (void);
/// Destructor.
virtual ~TAO_MMAP_Allocator (void);
/// Return backing store handle.
ACE_HANDLE handle (void);
/// Return offset in backing store file for memory address @a p. If @a p
/// is not coming from this allocator -1 is returned.
off_t offset (void * p);
private:
// Disallow copying.
TAO_MMAP_Allocator (TAO_MMAP_Allocator const &);
void operator= (TAO_MMAP_Allocator const &);
};
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_HAS_SENDFILE==1 */
#include /**/ "ace/post.h"
#endif /* TAO_MMAP_ALLOCATOR_H */
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