2 * GLX Hardware Device Driver common code
3 * Copyright (C) 1999 Wittawat Yamwong
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
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10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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26 * Memory manager code. Primarily used by device drivers to manage texture
36 struct mem_block
*next
, *prev
;
37 struct mem_block
*next_free
, *prev_free
;
38 struct mem_block
*heap
;
48 * input: total size in bytes
49 * return: a heap pointer if OK, NULL if error
51 extern struct mem_block
*mmInit(unsigned ofs
, unsigned size
);
54 * Allocate 'size' bytes with 2^align2 bytes alignment,
55 * restrict the search to free memory after 'startSearch'
56 * depth and back buffers should be in different 4mb banks
57 * to get better page hits if possible
58 * input: size = size of block
59 * align2 = 2^align2 bytes alignment
60 * startSearch = linear offset from start of heap to begin search
61 * return: pointer to the allocated block, 0 if error
63 extern struct mem_block
*mmAllocMem(struct mem_block
*heap
, unsigned size
,
64 unsigned align2
, unsigned startSearch
);
67 * Free block starts at offset
68 * input: pointer to a block
69 * return: 0 if OK, -1 if error
71 extern int mmFreeMem(struct mem_block
*b
);
74 * Free block starts at offset
75 * input: pointer to a heap, start offset
76 * return: pointer to a block
78 extern struct mem_block
*mmFindBlock(struct mem_block
*heap
, unsigned start
);
83 extern void mmDestroy(struct mem_block
*mmInit
);
86 * For debuging purpose.
88 extern void mmDumpMemInfo(const struct mem_block
*mmInit
);