| 1 | /* |
| 2 | * MessagePack for C memory pool implementation |
| 3 | * |
| 4 | * Copyright (C) 2008-2009 FURUHASHI Sadayuki |
| 5 | * |
| 6 | * Distributed under the Boost Software License, Version 1.0. |
| 7 | * (See accompanying file LICENSE_1_0.txt or copy at |
| 8 | * http://www.boost.org/LICENSE_1_0.txt) |
| 9 | */ |
| 10 | #include "vendor/msgpack/zone.h" |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | struct msgpack_zone_chunk { |
| 15 | struct msgpack_zone_chunk* next; |
| 16 | /* data ... */ |
| 17 | }; |
| 18 | |
| 19 | static inline bool init_chunk_list(msgpack_zone_chunk_list* cl, size_t chunk_size) |
| 20 | { |
| 21 | msgpack_zone_chunk* chunk = (msgpack_zone_chunk*)malloc( |
| 22 | sizeof(msgpack_zone_chunk) + chunk_size); |
| 23 | if(chunk == NULL) { |
| 24 | return false; |
| 25 | } |
| 26 | |
| 27 | cl->head = chunk; |
| 28 | cl->free = chunk_size; |
| 29 | cl->ptr = ((char*)chunk) + sizeof(msgpack_zone_chunk); |
| 30 | chunk->next = NULL; |
| 31 | |
| 32 | return true; |
| 33 | } |
| 34 | |
| 35 | static inline void destroy_chunk_list(msgpack_zone_chunk_list* cl) |
| 36 | { |
| 37 | msgpack_zone_chunk* c = cl->head; |
| 38 | while(true) { |
| 39 | msgpack_zone_chunk* n = c->next; |
| 40 | free(c); |
| 41 | if(n != NULL) { |
| 42 | c = n; |
| 43 | } else { |
| 44 | break; |
| 45 | } |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | static inline void clear_chunk_list(msgpack_zone_chunk_list* cl, size_t chunk_size) |
| 50 | { |
| 51 | msgpack_zone_chunk* c = cl->head; |
| 52 | while(true) { |
| 53 | msgpack_zone_chunk* n = c->next; |
| 54 | if(n != NULL) { |
| 55 | free(c); |
| 56 | c = n; |
| 57 | } else { |
| 58 | cl->head = c; |
| 59 | break; |
| 60 | } |
| 61 | } |
| 62 | cl->head->next = NULL; |
| 63 | cl->free = chunk_size; |
| 64 | cl->ptr = ((char*)cl->head) + sizeof(msgpack_zone_chunk); |
| 65 | } |
| 66 | |
| 67 | void* msgpack_zone_malloc_expand(msgpack_zone* zone, size_t size) |
| 68 | { |
| 69 | msgpack_zone_chunk_list* const cl = &zone->chunk_list; |
| 70 | msgpack_zone_chunk* chunk; |
| 71 | |
| 72 | size_t sz = zone->chunk_size; |
| 73 | |
| 74 | while(sz < size) { |
| 75 | size_t tmp_sz = sz * 2; |
| 76 | if (tmp_sz <= sz) { |
| 77 | sz = size; |
| 78 | break; |
| 79 | } |
| 80 | sz = tmp_sz; |
| 81 | } |
| 82 | |
| 83 | chunk = (msgpack_zone_chunk*)malloc( |
| 84 | sizeof(msgpack_zone_chunk) + sz); |
| 85 | if (chunk == NULL) { |
| 86 | return NULL; |
| 87 | } |
| 88 | else { |
| 89 | char* ptr = ((char*)chunk) + sizeof(msgpack_zone_chunk); |
| 90 | chunk->next = cl->head; |
| 91 | cl->head = chunk; |
| 92 | cl->free = sz - size; |
| 93 | cl->ptr = ptr + size; |
| 94 | |
| 95 | return ptr; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | |
| 100 | static inline void init_finalizer_array(msgpack_zone_finalizer_array* fa) |
| 101 | { |
| 102 | fa->tail = NULL; |
| 103 | fa->end = NULL; |
| 104 | fa->array = NULL; |
| 105 | } |
| 106 | |
| 107 | static inline void call_finalizer_array(msgpack_zone_finalizer_array* fa) |
| 108 | { |
| 109 | msgpack_zone_finalizer* fin = fa->tail; |
| 110 | for(; fin != fa->array; --fin) { |
| 111 | (*(fin-1)->func)((fin-1)->data); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | static inline void destroy_finalizer_array(msgpack_zone_finalizer_array* fa) |
| 116 | { |
| 117 | call_finalizer_array(fa); |
| 118 | free(fa->array); |
| 119 | } |
| 120 | |
| 121 | static inline void clear_finalizer_array(msgpack_zone_finalizer_array* fa) |
| 122 | { |
| 123 | call_finalizer_array(fa); |
| 124 | fa->tail = fa->array; |
| 125 | } |
| 126 | |
| 127 | bool msgpack_zone_push_finalizer_expand(msgpack_zone* zone, |
| 128 | void (*func)(void* data), void* data) |
| 129 | { |
| 130 | msgpack_zone_finalizer_array* const fa = &zone->finalizer_array; |
| 131 | msgpack_zone_finalizer* tmp; |
| 132 | |
| 133 | const size_t nused = (size_t)(fa->end - fa->array); |
| 134 | |
| 135 | size_t nnext; |
| 136 | if(nused == 0) { |
| 137 | nnext = (sizeof(msgpack_zone_finalizer) < 72/2) ? |
| 138 | 72 / sizeof(msgpack_zone_finalizer) : 8; |
| 139 | |
| 140 | } else { |
| 141 | nnext = nused * 2; |
| 142 | } |
| 143 | |
| 144 | tmp = (msgpack_zone_finalizer*)realloc(fa->array, |
| 145 | sizeof(msgpack_zone_finalizer) * nnext); |
| 146 | if(tmp == NULL) { |
| 147 | return false; |
| 148 | } |
| 149 | |
| 150 | fa->array = tmp; |
| 151 | fa->end = tmp + nnext; |
| 152 | fa->tail = tmp + nused; |
| 153 | |
| 154 | fa->tail->func = func; |
| 155 | fa->tail->data = data; |
| 156 | |
| 157 | ++fa->tail; |
| 158 | |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | bool msgpack_zone_is_empty(msgpack_zone* zone) |
| 164 | { |
| 165 | msgpack_zone_chunk_list* const cl = &zone->chunk_list; |
| 166 | msgpack_zone_finalizer_array* const fa = &zone->finalizer_array; |
| 167 | return cl->free == zone->chunk_size && cl->head->next == NULL && |
| 168 | fa->tail == fa->array; |
| 169 | } |
| 170 | |
| 171 | |
| 172 | void msgpack_zone_destroy(msgpack_zone* zone) |
| 173 | { |
| 174 | destroy_finalizer_array(&zone->finalizer_array); |
| 175 | destroy_chunk_list(&zone->chunk_list); |
| 176 | } |
| 177 | |
| 178 | void msgpack_zone_clear(msgpack_zone* zone) |
| 179 | { |
| 180 | clear_finalizer_array(&zone->finalizer_array); |
| 181 | clear_chunk_list(&zone->chunk_list, zone->chunk_size); |
| 182 | } |
| 183 | |
| 184 | bool msgpack_zone_init(msgpack_zone* zone, size_t chunk_size) |
| 185 | { |
| 186 | zone->chunk_size = chunk_size; |
| 187 | |
| 188 | if(!init_chunk_list(&zone->chunk_list, chunk_size)) { |
| 189 | return false; |
| 190 | } |
| 191 | |
| 192 | init_finalizer_array(&zone->finalizer_array); |
| 193 | |
| 194 | return true; |
| 195 | } |
| 196 | |
| 197 | msgpack_zone* msgpack_zone_new(size_t chunk_size) |
| 198 | { |
| 199 | msgpack_zone* zone = (msgpack_zone*)malloc( |
| 200 | sizeof(msgpack_zone)); |
| 201 | if(zone == NULL) { |
| 202 | return NULL; |
| 203 | } |
| 204 | |
| 205 | zone->chunk_size = chunk_size; |
| 206 | |
| 207 | if(!init_chunk_list(&zone->chunk_list, chunk_size)) { |
| 208 | free(zone); |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | init_finalizer_array(&zone->finalizer_array); |
| 213 | |
| 214 | return zone; |
| 215 | } |
| 216 | |
| 217 | void msgpack_zone_free(msgpack_zone* zone) |
| 218 | { |
| 219 | if(zone == NULL) { return; } |
| 220 | msgpack_zone_destroy(zone); |
| 221 | free(zone); |
| 222 | } |