mirror of
https://github.com/reactos/reactos.git
synced 2024-11-07 07:00:19 +00:00
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
|
/*
|
||
|
|
* 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
|