Mercurial > repos > rhope
annotate runtime/fixed_alloc.h @ 62:b218af069da7
merge
author | Mike Pavone <pavone@retrodev.com> |
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date | Sat, 10 Oct 2009 16:43:37 -0400 |
parents | 1b86a1ee500a |
children | a24eb366195c |
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1 #ifndef FIXED_ALLOC_H_ |
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2 #define FIXED_ALLOC_H_ |
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3 |
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4 #include <stddef.h> |
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5 #include "plat_types.h" |
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6 #include "block_alloc.h" |
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7 |
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8 #define GET_BLOCK(ptr) ((void*)(((uint32_t)(ptr))&(~(BLOCK_SIZE-1)))) |
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9 |
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10 #define MAX_SIZE (BLOCK_SIZE/32) |
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11 #define STRIDE (BLOCK_SIZE/1024) |
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12 #define MIN_SIZE (BLOCK_SIZE/1024) |
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13 #define MAX_FREE 16 |
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14 |
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15 #define ADJUST_SIZE(requested) (((requested)+(STRIDE-1)) & (~(STRIDE-1))) |
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16 |
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17 |
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18 #pragma pack(push,1) |
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19 typedef struct mem_block { |
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20 struct mem_block *next; |
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21 struct mem_block *last; |
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22 uint16_t numfree; |
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23 uint16_t firstfree; |
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24 uint8_t bitmap[1]; |
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25 } mem_block; |
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26 #pragma pack(pop) |
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27 |
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28 //num_elements = (BLOCK_SIZE - sizeof(mem_block)+1)*8/(sizeof(element)*8+1) |
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29 typedef struct { |
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30 mem_block *freelist; |
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31 mem_block *inuse[(MAX_SIZE-MIN_SIZE)/STRIDE]; |
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32 uint32_t freecount; |
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33 } mem_manager; |
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34 |
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35 void fixed_alloc_init(); |
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36 mem_manager * new_mem_manager(); |
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37 void * falloc(size_t size, mem_manager * manager); |
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38 void ffree(void * ptr, size_t size, mem_manager * manager); |
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39 |
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40 #endif //FIXED_ALLOC_H_ |