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
39 struct mem_block
*next
, *prev
;
40 struct mem_block
*next_free
, *prev_free
;
41 struct mem_block
*heap
;
44 unsigned int reserved
:1;
50 * input: total size in bytes
51 * return: a heap pointer if OK, NULL if error
53 extern struct mem_block
*mmInit(int ofs
, int size
);
56 * Allocate 'size' bytes with 2^align2 bytes alignment,
57 * restrict the search to free memory after 'startSearch'
58 * depth and back buffers should be in different 4mb banks
59 * to get better page hits if possible
60 * input: size = size of block
61 * align2 = 2^align2 bytes alignment
62 * startSearch = linear offset from start of heap to begin search
63 * return: pointer to the allocated block, 0 if error
65 extern struct mem_block
*mmAllocMem(struct mem_block
*heap
, int size
, int align2
,
69 * Free block starts at offset
70 * input: pointer to a block
71 * return: 0 if OK, -1 if error
73 extern int mmFreeMem(struct mem_block
*b
);
76 * Free block starts at offset
77 * input: pointer to a heap, start offset
78 * return: pointer to a block
80 extern struct mem_block
*mmFindBlock(struct mem_block
*heap
, int start
);
85 extern void mmDestroy(struct mem_block
*mmInit
);
88 * For debuging purpose.
90 extern void mmDumpMemInfo(const struct mem_block
*mmInit
);