1 /* 2 * Copyright (c) 2003 Marcus Overhagen 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 * DEALINGS IN THE SOFTWARE. 21 */ 22 #ifndef _BLOCK_CACHE_H 23 #define _BLOCK_CACHE_H 24 25 #include <BeBuild.h> 26 #include <Locker.h> 27 28 /* The OpenBeOS implementation of the BBlockCache. 29 * A class used to manage a pool of memory blocks. 30 */ 31 32 /* The allocation type to be used in the constructor 33 */ 34 enum { 35 B_OBJECT_CACHE = 0, 36 B_MALLOC_CACHE = 1 37 }; 38 39 /* The BBlockCache class: 40 */ 41 class BBlockCache 42 { 43 public: 44 BBlockCache(uint32 blockCount, 45 size_t blockSize, 46 uint32 allocationType); 47 virtual ~BBlockCache(); 48 49 void * Get(size_t blockSize); 50 void Save(void *pointer, size_t blockSize); 51 52 /* Private or reserved functions and data 53 */ 54 private: 55 virtual void _ReservedBlockCache1(); 56 virtual void _ReservedBlockCache2(); 57 58 BBlockCache(const BBlockCache &); 59 BBlockCache &operator=(const BBlockCache &); 60 61 struct _FreeBlock; 62 63 _FreeBlock *fFreeList; 64 size_t fBlockSize; 65 int32 fFreeBlocks; 66 int32 fBlockCount; 67 BLocker fLocker; 68 void * (*fAlloc)(size_t size); 69 void (*fFree)(void *pointer); 70 uint32 _reserved[2]; 71 }; 72 73 #endif /* _BLOCK_CACHE_H */ 74