94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file vertexDataSaveFile.h
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* @author drose
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* @date 2007-05-12
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*/
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#ifndef VERTEXDATASAVEFILE_H
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#define VERTEXDATASAVEFILE_H
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#include "pandabase.h"
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#include "simpleAllocator.h"
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#include "filename.h"
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#include "pmutex.h"
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#if defined(_WIN32)
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#ifndef WIN32_LEAN_AND_MEAN
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#define WIN32_LEAN_AND_MEAN 1
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#endif
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#include <windows.h>
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#endif
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class VertexDataSaveBlock;
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/**
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* A temporary file to hold the vertex data that has been evicted from memory
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* and written to disk. All vertex data arrays are written into one large
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* flat file.
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*/
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class EXPCL_PANDA_GOBJ VertexDataSaveFile : public SimpleAllocator {
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public:
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VertexDataSaveFile(const Filename &directory, const std::string &prefix,
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size_t max_size);
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~VertexDataSaveFile();
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PUBLISHED:
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INLINE bool is_valid() const;
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INLINE size_t get_total_file_size() const;
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INLINE size_t get_used_file_size() const;
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public:
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PT(VertexDataSaveBlock) write_data(const unsigned char *data, size_t size,
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bool compressed);
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bool read_data(unsigned char *data, size_t size,
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VertexDataSaveBlock *block);
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protected:
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virtual SimpleAllocatorBlock *make_block(size_t start, size_t size);
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private:
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Filename _filename;
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bool _is_valid;
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size_t _total_file_size;
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Mutex _lock;
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#ifdef _WIN32
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HANDLE _handle;
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#else
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int _fd; // Posix file descriptor
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#endif // _WIN32
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};
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/**
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* A block of bytes on the save file.
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*/
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class EXPCL_PANDA_GOBJ VertexDataSaveBlock : public SimpleAllocatorBlock, public ReferenceCount {
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protected:
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INLINE VertexDataSaveBlock(VertexDataSaveFile *file,
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size_t start, size_t size);
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public:
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INLINE void set_compressed(bool compressed);
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INLINE bool get_compressed() const;
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private:
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bool _compressed;
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public:
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INLINE unsigned char *get_pointer() const;
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friend class VertexDataSaveFile;
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};
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#include "vertexDataSaveFile.I"
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#endif
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