0,0 → 1,91 |
/************************************************************************** |
* |
* Copyright (C) 1999 Wittawat Yamwong |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice shall be included |
* in all copies or substantial portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, |
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE |
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
* |
**************************************************************************/ |
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/** |
* @file |
* Memory manager code. Primarily used by device drivers to manage texture |
* heaps, etc. |
*/ |
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#ifndef _U_MM_H_ |
#define _U_MM_H_ |
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struct mem_block { |
struct mem_block *next, *prev; |
struct mem_block *next_free, *prev_free; |
struct mem_block *heap; |
int ofs,size; |
unsigned int free:1; |
unsigned int reserved:1; |
}; |
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/** |
* input: total size in bytes |
* return: a heap pointer if OK, NULL if error |
*/ |
extern struct mem_block *u_mmInit(int ofs, int size); |
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/** |
* Allocate 'size' bytes with 2^align2 bytes alignment, |
* restrict the search to free memory after 'startSearch' |
* depth and back buffers should be in different 4mb banks |
* to get better page hits if possible |
* input: size = size of block |
* align2 = 2^align2 bytes alignment |
* startSearch = linear offset from start of heap to begin search |
* return: pointer to the allocated block, 0 if error |
*/ |
extern struct mem_block *u_mmAllocMem(struct mem_block *heap, int size, int align2, |
int startSearch); |
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/** |
* Free block starts at offset |
* input: pointer to a block |
* return: 0 if OK, -1 if error |
*/ |
extern int u_mmFreeMem(struct mem_block *b); |
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/** |
* Free block starts at offset |
* input: pointer to a heap, start offset |
* return: pointer to a block |
*/ |
extern struct mem_block *u_mmFindBlock(struct mem_block *heap, int start); |
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/** |
* destroy MM |
*/ |
extern void u_mmDestroy(struct mem_block *mmInit); |
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/** |
* For debugging purposes. |
*/ |
extern void u_mmDumpMemInfo(const struct mem_block *mmInit); |
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#endif |