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comparison: src/server/ucx/mempool.c

src/server/ucx/mempool.c

changeset 95
74a81d9e19d0
parent 94
6b15a094d996
child 96
0185b13bf41f
equal deleted inserted replaced
94:6b15a094d996 95:74a81d9e19d0
1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2013 Olaf Wintermann. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <stdlib.h>
30 #include <string.h>
31 #include <stdio.h>
32 #ifdef __cplusplus
33 #define __STDC_FORMAT_MACROS
34 #endif
35 #include <inttypes.h>
36
37 #include "mempool.h"
38
39 typedef struct {
40 ucx_destructor destructor;
41 char c;
42 } ucx_memchunk;
43
44 typedef struct {
45 ucx_destructor destructor;
46 void *ptr;
47 } ucx_regdestr;
48
49 void ucx_mempool_shared_destr(void* ptr) {
50 ucx_regdestr *rd = (ucx_regdestr*)ptr;
51 rd->destructor(rd->ptr);
52 }
53
54 UcxMempool *ucx_mempool_new(size_t n) {
55 UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool));
56 if (pool == NULL) return NULL;
57
58 pool->data = (void**) malloc(n * sizeof(void*));
59 if (pool->data == NULL) {
60 free(pool);
61 return NULL;
62 }
63
64 pool->ndata = 0;
65 pool->size = n;
66 return pool;
67 }
68
69 int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) {
70 void **data = (void**) realloc(pool->data, newcap*sizeof(void*));
71 if (data == NULL) {
72 return 1;
73 } else {
74 pool->data = data;
75 pool->size = newcap;
76 return EXIT_SUCCESS;
77 }
78 }
79
80 void *ucx_mempool_malloc(UcxMempool *pool, size_t n) {
81 ucx_memchunk *mem = (ucx_memchunk*)malloc(sizeof(ucx_destructor) + n);
82 if (mem == NULL) return NULL;
83
84 if (pool->ndata >= pool->size) {
85 ucx_mempool_chcap(pool, pool->size + 16);
86 }
87
88 mem->destructor = NULL;
89 pool->data[pool->ndata] = mem;
90 pool->ndata++;
91
92 return &mem->c;
93 }
94
95 void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) {
96 void *ptr = ucx_mempool_malloc(pool, nelem*elsize);
97 if(ptr == NULL) {
98 return NULL;
99 }
100 memset(ptr, 0, nelem * elsize);
101 return ptr;
102 }
103
104 void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) {
105 char *mem = ((char*)ptr) - sizeof(ucx_destructor);
106 char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor));
107 if (newm == NULL) return NULL;
108 if (mem != newm) {
109 for(size_t i=0 ; i < pool->ndata ; i++) {
110 if(pool->data[i] == mem) {
111 pool->data[i] = newm;
112 return newm + sizeof(ucx_destructor);
113 }
114 }
115 fprintf(stderr, "FATAL: 0x%08"PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
116 (intptr_t)ptr, (intptr_t)pool);
117 exit(1);
118 } else {
119 return newm + sizeof(ucx_destructor);
120 }
121 }
122
123 void ucx_mempool_free(UcxMempool *pool, void *ptr) {
124 ucx_memchunk *chunk = (ucx_memchunk*)((char*)ptr-sizeof(ucx_destructor));
125 for(size_t i=0 ; i<pool->ndata ; i++) {
126 if(chunk == pool->data[i]) {
127 if(chunk->destructor != NULL) {
128 chunk->destructor(&chunk->c);
129 }
130 free(chunk);
131 size_t last_index = pool->ndata - 1;
132 if(i != last_index) {
133 pool->data[i] = pool->data[last_index];
134 }
135 pool->ndata--;
136 return;
137 }
138 }
139 fprintf(stderr, "FATAL: 0x%08"PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
140 (intptr_t)ptr, (intptr_t)pool);
141 exit(1);
142 }
143
144 void ucx_mempool_destroy(UcxMempool *pool) {
145 ucx_memchunk *chunk;
146 for(size_t i=0 ; i<pool->ndata ; i++) {
147 chunk = (ucx_memchunk*) pool->data[i];
148 if(chunk) {
149 if(chunk->destructor != NULL) {
150 chunk->destructor(&chunk->c);
151 }
152 free(chunk);
153 }
154 }
155 free(pool->data);
156 free(pool);
157 }
158
159 void ucx_mempool_set_destr(void *ptr, ucx_destructor func) {
160 *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func;
161 }
162
163 void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) {
164 ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc(
165 pool,
166 sizeof(ucx_regdestr));
167 rd->destructor = destr;
168 rd->ptr = ptr;
169 ucx_mempool_set_destr(rd, ucx_mempool_shared_destr);
170 }
171
172 UcxAllocator* ucx_mempool_allocator(UcxMempool *pool) {
173 UcxAllocator *allocator = (UcxAllocator*)ucx_mempool_malloc(
174 pool, sizeof(UcxAllocator));
175 if(!allocator) {
176 return NULL;
177 }
178 allocator->malloc = (ucx_allocator_malloc)ucx_mempool_malloc;
179 allocator->calloc = (ucx_allocator_calloc)ucx_mempool_calloc;
180 allocator->realloc = (ucx_allocator_realloc)ucx_mempool_realloc;
181 allocator->free = (ucx_allocator_free)ucx_mempool_free;
182 allocator->pool = pool;
183 return allocator;
184 }

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