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/*
* GLX Hardware Device Driver common code
* 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.
*/
/**
* Memory manager code. Primarily used by device drivers to manage texture
* heaps, etc.
*/
#ifndef MM_H
#define MM_H
struct mem_block {
struct mem_block *next, *prev;
struct mem_block *next_free, *prev_free;
struct mem_block *heap;
unsigned ofs;
unsigned size;
unsigned free:1;
unsigned reserved:1;
};
/**
* input: total size in bytes
* return: a heap pointer if OK, NULL if error
*/
extern struct mem_block *mmInit(unsigned ofs, unsigned size);
/**
* 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 *mmAllocMem(struct mem_block *heap, unsigned size,
unsigned align2, unsigned startSearch);
/**
* Free block starts at offset
* input: pointer to a block
* return: 0 if OK, -1 if error
*/
extern int mmFreeMem(struct mem_block *b);
/**
* Free block starts at offset
* input: pointer to a heap, start offset
* return: pointer to a block
*/
extern struct mem_block *mmFindBlock(struct mem_block *heap, unsigned start);
/**
* destroy MM
*/
extern void mmDestroy(struct mem_block *mmInit);
/**
* For debuging purpose.
*/
extern void mmDumpMemInfo(const struct mem_block *mmInit);
#endif
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