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120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/* -*- C++ -*- */
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//=============================================================================
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/**
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* @file Shared_Memory_MM.h
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*
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* $Id: Shared_Memory_MM.h 80826 2008-03-04 14:51:23Z wotte $
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*
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* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
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*/
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//=============================================================================
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#ifndef ACE_SHARED_MALLOC_MM_H
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#define ACE_SHARED_MALLOC_MM_H
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#include /**/ "ace/pre.h"
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#include "ace/Shared_Memory.h"
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#if !defined (ACE_LACKS_PRAGMA_ONCE)
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# pragma once
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#endif /* ACE_LACKS_PRAGMA_ONCE */
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#include "ace/Mem_Map.h"
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ACE_BEGIN_VERSIONED_NAMESPACE_DECL
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/**
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* @class ACE_Shared_Memory_MM
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*
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* @brief Shared memory wrapper based on MMAP.
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*
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* This class provides a very simple-minded shared memory manager. We
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* strongly recommend that you do NOT use this class. Instead, please
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* use @c ACE_Malloc, which has much more powerful capabilities.
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*/
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class ACE_Export ACE_Shared_Memory_MM : public ACE_Shared_Memory
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{
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public:
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// = Initialization and termination methods.
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/// Default constructor.
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ACE_Shared_Memory_MM (void);
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/// Constructor.
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ACE_Shared_Memory_MM (ACE_HANDLE handle,
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size_t length = static_cast<size_t> (-1),
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int prot = PROT_RDWR,
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int share = ACE_MAP_PRIVATE,
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char *addr = 0,
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ACE_OFF_T pos = 0);
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/// Constructor.
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ACE_Shared_Memory_MM (const ACE_TCHAR *file_name,
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size_t length = static_cast<size_t> (-1),
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int flags = O_RDWR | O_CREAT,
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int mode = ACE_DEFAULT_FILE_PERMS,
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int prot = PROT_RDWR,
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int share = ACE_MAP_SHARED,
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char *addr = 0, ACE_OFF_T pos = 0);
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/// Open method.
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int open (ACE_HANDLE handle,
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size_t length = static_cast<size_t> (-1),
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int prot = PROT_RDWR,
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int share = ACE_MAP_PRIVATE,
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char *addr = 0,
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ACE_OFF_T pos = 0);
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/// Open method.
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int open (const ACE_TCHAR *file_name,
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size_t length = static_cast<size_t> (-1),
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int flags = O_RDWR | O_CREAT,
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int mode = ACE_DEFAULT_FILE_PERMS,
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int prot = PROT_RDWR,
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int share = ACE_MAP_SHARED,
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char *addr = 0,
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ACE_OFF_T pos = 0);
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/// Return the name of file that is mapped (if any).
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const ACE_TCHAR *filename (void) const;
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/// Close down the shared memory segment.
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virtual int close (void);
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/// Remove the shared memory segment and the underlying file.
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virtual int remove (void);
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// = Allocation and deallocation methods.
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/// Create a new chuck of memory containing @a size bytes.
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virtual void *malloc (size_t size = 0);
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/// Free a chuck of memory allocated by
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/// <ACE_Shared_Memory_MM::malloc>.
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virtual int free (void *p);
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/// Return the size of the shared memory segment.
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virtual size_t get_segment_size (void) const;
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/// Return the ID of the shared memory segment (i.e., an ACE_HANDLE).
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virtual ACE_HANDLE get_id (void) const;
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/// Dump the state of an object.
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void dump (void) const;
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/// Declare the dynamic allocation hooks.
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ACE_ALLOC_HOOK_DECLARE;
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private:
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/// This version is implemented with memory-mapped files.
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ACE_Mem_Map shared_memory_;
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};
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ACE_END_VERSIONED_NAMESPACE_DECL
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#if defined (__ACE_INLINE__)
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#include "ace/Shared_Memory_MM.inl"
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#endif /* __ACE_INLINE__ */
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#include /**/ "ace/post.h"
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#endif /* ACE_SHARED_MALLOC_MM_H */
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