comparison: ucx/mpool.c
ucx/mpool.c
- changeset 13
- 98ac89e3aa37
- child 14
- b78e174b6814
equal
deleted
inserted
replaced
| 12:fe50a85e69e7 | 13:98ac89e3aa37 |
|---|---|
| 1 /* | |
| 2 * | |
| 3 */ | |
| 4 | |
| 5 #include <stdlib.h> | |
| 6 #include <string.h> | |
| 7 #include <stdio.h> | |
| 8 | |
| 9 #include "mpool.h" | |
| 10 | |
| 11 typedef struct { | |
| 12 ucx_destructor destructor; | |
| 13 char c; | |
| 14 } ucx_memchunk; | |
| 15 | |
| 16 typedef struct { | |
| 17 ucx_destructor destructor; | |
| 18 void *ptr; | |
| 19 } ucx_regdestr; | |
| 20 | |
| 21 void ucx_mempool_shared_destr(void* ptr) { | |
| 22 ucx_regdestr *rd = (ucx_regdestr*)ptr; | |
| 23 rd->destructor(rd->ptr); | |
| 24 } | |
| 25 | |
| 26 UcxMempool *ucx_mempool_new(size_t n) { | |
| 27 UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool*)); | |
| 28 pool->data = malloc(n * sizeof(void*)); | |
| 29 pool->ndata = 0; | |
| 30 pool->size = n; | |
| 31 return pool; | |
| 32 } | |
| 33 | |
| 34 void ucx_mempool_chcap(UcxMempool *pool, size_t newcap) { | |
| 35 void **data = realloc(pool->data, newcap*sizeof(void*)); | |
| 36 pool->data = data; | |
| 37 pool->size = newcap; | |
| 38 } | |
| 39 | |
| 40 void *ucx_mempool_malloc(UcxMempool *pool, size_t n) { | |
| 41 ucx_memchunk *mem = (ucx_memchunk*)malloc(sizeof(ucx_destructor) + n); | |
| 42 if(mem == NULL) { | |
| 43 return NULL; | |
| 44 } | |
| 45 | |
| 46 if (pool->ndata >= pool->size) { | |
| 47 ucx_mempool_chcap(pool, pool->size + 16); | |
| 48 } | |
| 49 | |
| 50 mem->destructor = NULL; | |
| 51 pool->data[pool->ndata] = mem; | |
| 52 pool->ndata++; | |
| 53 | |
| 54 return &mem->c; | |
| 55 } | |
| 56 | |
| 57 void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) { | |
| 58 void *ptr = ucx_mempool_malloc(pool, nelem*elsize); | |
| 59 if(ptr == NULL) { | |
| 60 return NULL; | |
| 61 } | |
| 62 memset(ptr, 0, nelem * elsize); | |
| 63 return ptr; | |
| 64 } | |
| 65 | |
| 66 void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) { | |
| 67 void *mem = ((char*)ptr) - sizeof(ucx_destructor); | |
| 68 for(int i=0;i<pool->ndata;i++) { | |
| 69 if(pool->data[i] == mem) { | |
| 70 mem == realloc(mem, n); | |
| 71 pool->data[i] = mem; | |
| 72 return mem; | |
| 73 } | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 void ucx_mempool_free(UcxMempool *pool) { | |
| 78 ucx_memchunk *chunk; | |
| 79 for(int i=0;i<pool->ndata;i++) { | |
| 80 chunk = (ucx_memchunk*) pool->data[i]; | |
| 81 if(chunk->destructor != NULL) { | |
| 82 chunk->destructor(&chunk->c); | |
| 83 } | |
| 84 free(chunk); | |
| 85 } | |
| 86 free(pool->data); | |
| 87 free(pool); | |
| 88 } | |
| 89 | |
| 90 void ucx_mempool_set_destr(void *ptr, ucx_destructor func) { | |
| 91 *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func; | |
| 92 } | |
| 93 | |
| 94 void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) { | |
| 95 ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc( | |
| 96 pool, | |
| 97 sizeof(ucx_regdestr)); | |
| 98 rd->destructor = destr; | |
| 99 rd->ptr; | |
| 100 ucx_mempool_set_destr(rd, ucx_mempool_shared_destr); | |
| 101 } |
