mirror of
https://github.com/EQEmu/Server.git
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87 lines
2.6 KiB
C++
87 lines
2.6 KiB
C++
/* EQEMu: Everquest Server Emulator
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Copyright (C) 2001-2013 EQEMu Development Team (http://eqemulator.net)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY except by those people which sell it, which
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are required to give you total support for your newly bought product;
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without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _EQEMU_MEMORYMAPPEDFILE_H_
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#define _EQEMU_MEMORYMAPPEDFILE_H_
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#include <string>
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#include "types.h"
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namespace EQEmu {
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//! Memory Backed Shared Memory
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/*!
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Allows us to create shared memory that is backed by a file on both windows and unix platforms that
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works in a consistent manner. Non-copyable.
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*/
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class MemoryMappedFile {
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struct Implementation;
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struct shared_memory_struct;
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//! Underlying data structure.
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struct shared_memory_struct {
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uint32 size;
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unsigned char data[1];
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};
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public:
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//! Constructor
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/*!
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Creates a mmf for the given filename and of size.
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\param filename Actual filename of the mmf.
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\param size Size in bytes of the mmf.
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*/
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MemoryMappedFile(std::string filename, uint32 size);
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//! Constructor
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/*!
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Creates a mmf for the given filename and gets the size based on the existing size.
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\param filename Actual filename of the mmf.
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*/
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MemoryMappedFile(std::string filename);
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//! Destructor
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~MemoryMappedFile();
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//! Get Data Operator
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inline void *operator->() const { return memory_->data; }
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//! Get Data Function
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inline void *Get() const { return memory_->data; }
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//! Get Size Function
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inline uint32 Size() const { return memory_->size; }
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//! Zeros all the memory in the file, and set it to be unloaded
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void ZeroFile();
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private:
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//! Copy Constructor
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MemoryMappedFile(const MemoryMappedFile&);
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//! Assignment Operator
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const MemoryMappedFile& operator=(const MemoryMappedFile&);
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std::string filename_; //!< Filename of this shared memory object
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uint32 size_; //!< Size in bytes of this shared memory object
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shared_memory_struct *memory_; //!< Underlying data of the shared memory object.
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Implementation *imp_; //!< Underlying implementation.
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};
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} // EQEmu
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#endif
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