Thu, 24 May 2012 12:51:52 +0200
new proppatch, mkcol and delete method
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1 | /* |
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2 | * |
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3 | */ |
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4 | |
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5 | #include <stdlib.h> |
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6 | #include <string.h> |
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7 | #include <stdio.h> |
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8 | #include <errno.h> |
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9 | |
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10 | #include "mempool.h" |
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11 | |
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12 | typedef struct { |
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13 | ucx_destructor destructor; |
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14 | char c; |
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15 | } ucx_memchunk; |
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16 | |
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17 | typedef struct { |
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18 | ucx_destructor destructor; |
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19 | void *ptr; |
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20 | } ucx_regdestr; |
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21 | |
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22 | void ucx_mempool_shared_destr(void* ptr) { |
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23 | ucx_regdestr *rd = (ucx_regdestr*)ptr; |
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24 | rd->destructor(rd->ptr); |
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25 | } |
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26 | |
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27 | UcxMempool *ucx_mempool_new(size_t n) { |
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28 | UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool)); |
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29 | if (pool == NULL) return NULL; |
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30 | |
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31 | pool->data = malloc(n * sizeof(void*)); |
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32 | if (pool->data == NULL) { |
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33 | free(pool); |
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34 | return NULL; |
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35 | } |
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36 | |
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37 | pool->ndata = 0; |
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38 | pool->size = n; |
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39 | return pool; |
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40 | } |
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41 | |
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42 | int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) { |
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43 | void **data = realloc(pool->data, newcap*sizeof(void*)); |
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44 | if (data == NULL) { |
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45 | return ENOMEM; |
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46 | } else { |
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47 | pool->data = data; |
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48 | pool->size = newcap; |
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49 | return EXIT_SUCCESS; |
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50 | } |
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51 | } |
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52 | |
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53 | void *ucx_mempool_malloc(UcxMempool *pool, size_t n) { |
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54 | ucx_memchunk *mem = (ucx_memchunk*)malloc(sizeof(ucx_destructor) + n); |
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55 | if (mem == NULL) return NULL; |
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56 | |
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57 | if (pool->ndata >= pool->size) { |
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58 | ucx_mempool_chcap(pool, pool->size + 16); |
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59 | } |
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60 | |
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61 | mem->destructor = NULL; |
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62 | pool->data[pool->ndata] = mem; |
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63 | pool->ndata++; |
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64 | |
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65 | return &mem->c; |
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66 | } |
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67 | |
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68 | void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) { |
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69 | void *ptr = ucx_mempool_malloc(pool, nelem*elsize); |
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70 | if(ptr == NULL) { |
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71 | return NULL; |
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72 | } |
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73 | memset(ptr, 0, nelem * elsize); |
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74 | return ptr; |
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75 | } |
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76 | |
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77 | void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) { |
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78 | void *mem = ((char*)ptr) - sizeof(ucx_destructor); |
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79 | char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor)); |
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80 | if (newm == NULL) return NULL; |
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81 | if (mem != newm) { |
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82 | for(int i=0;i<pool->ndata;i++) { |
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83 | if(pool->data[i] == mem) { |
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84 | pool->data[i] = newm; |
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85 | return ((char*) newm) + sizeof(ucx_destructor); |
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86 | } |
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87 | } |
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88 | fprintf(stderr, "FATAL: %8x not in mpool %8x\n", mem, pool); |
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89 | exit(1); |
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90 | } else { |
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91 | return ((char*) newm) + sizeof(ucx_destructor); |
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92 | } |
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93 | } |
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94 | |
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95 | void ucx_mempool_free(UcxMempool *pool) { |
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96 | ucx_memchunk *chunk; |
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97 | for(int i=0;i<pool->ndata;i++) { |
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98 | chunk = (ucx_memchunk*) pool->data[i]; |
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99 | if(chunk->destructor != NULL) { |
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100 | chunk->destructor(&chunk->c); |
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101 | } |
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102 | free(chunk); |
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103 | } |
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104 | free(pool->data); |
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105 | free(pool); |
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106 | } |
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107 | |
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108 | void ucx_mempool_set_destr(void *ptr, ucx_destructor func) { |
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109 | *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func; |
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110 | } |
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111 | |
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112 | void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) { |
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113 | ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc( |
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114 | pool, |
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115 | sizeof(ucx_regdestr)); |
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116 | rd->destructor = destr; |
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117 | rd->ptr = ptr; |
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118 | ucx_mempool_set_destr(rd, ucx_mempool_shared_destr); |
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119 | } |