67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
|
// Copyright (C) 2003 Dolphin Project.
|
||
|
|
|
||
|
|
// This program is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU General Public License as published by
|
||
|
|
// the Free Software Foundation, version 2.0.
|
||
|
|
|
||
|
|
// This program is distributed in the hope that it will be useful,
|
||
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
// GNU General Public License 2.0 for more details.
|
||
|
|
|
||
|
|
// A copy of the GPL 2.0 should have been included with the program.
|
||
|
|
// If not, see http://www.gnu.org/licenses/
|
||
|
|
|
||
|
|
// Official SVN repository and contact information can be found at
|
||
|
|
// http://code.google.com/p/dolphin-emu/
|
||
|
|
|
||
|
|
#ifndef _LINEAR_DISKCACHE
|
||
|
|
#define _LINEAR_DISKCACHE
|
||
|
|
|
||
|
|
#include "Common.h"
|
||
|
|
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
// On disk format:
|
||
|
|
// uint32 'DCAC'
|
||
|
|
// uint32 version; // svn_rev
|
||
|
|
// uint32 key_length;
|
||
|
|
// uint32 value_length;
|
||
|
|
// .... key;
|
||
|
|
// .... value;
|
||
|
|
|
||
|
|
class LinearDiskCacheReader {
|
||
|
|
public:
|
||
|
|
virtual void Read(const u8 *key, int key_size, const u8 *value, int value_size) = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Dead simple unsorted key-value store with append functionality.
|
||
|
|
// No random read functionality, all reading is done in OpenAndRead.
|
||
|
|
// Keys and values can contain any characters, including \0.
|
||
|
|
//
|
||
|
|
// Suitable for caching generated shader bytecode between executions.
|
||
|
|
// Not tuned for extreme performance but should be reasonably fast.
|
||
|
|
// Does not support keys or values larger than 2GB, which should be reasonable.
|
||
|
|
// Keys must have non-zero length; values can have zero length.
|
||
|
|
class LinearDiskCache {
|
||
|
|
public:
|
||
|
|
LinearDiskCache();
|
||
|
|
|
||
|
|
// Returns the number of items read from the cache.
|
||
|
|
int OpenAndRead(const char *filename, LinearDiskCacheReader *reader);
|
||
|
|
void Close();
|
||
|
|
void Sync();
|
||
|
|
|
||
|
|
// Appends a key-value pair to the store.
|
||
|
|
void Append(const u8 *key, int key_size, const u8 *value, int value_size);
|
||
|
|
|
||
|
|
private:
|
||
|
|
void WriteHeader();
|
||
|
|
bool ValidateHeader();
|
||
|
|
|
||
|
|
FILE *file_;
|
||
|
|
int num_entries_;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // _LINEAR_DISKCACHE
|