ucx: ucx/mempool.c@b4769e4eb4d1

     1 /*

     2  *

     3  */

     5 #include <stdlib.h>

     6 #include <string.h>

     7 #include <stdio.h>

     8 #include <errno.h>

    10 #include "mpool.h"

    12 typedef struct {

    13     ucx_destructor destructor;

    14     char c;

    15 } ucx_memchunk;

    17 typedef struct {

    18     ucx_destructor destructor;

    19     void           *ptr;

    20 } ucx_regdestr;

    22 void ucx_mempool_shared_destr(void* ptr) {

    23     ucx_regdestr *rd = (ucx_regdestr*)ptr;

    24     rd->destructor(rd->ptr);

    25 }

    27 UcxMempool *ucx_mempool_new(size_t n) {

    28     UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool));

    29     if (pool == NULL) return NULL;

    31     pool->data = malloc(n * sizeof(void*));

    32     if (pool->data == NULL) {

    33         free(pool);

    34         return NULL;

    35     }

    37     pool->ndata = 0;

    38     pool->size = n;

    39     return pool;

    40 }

    42 int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) {

    43     void **data = realloc(pool->data, newcap*sizeof(void*));

    44     if (data == NULL) {

    45         return ENOMEM;

    46     } else {

    47         pool->data = data;

    48         pool->size = newcap;

    49         return EXIT_SUCCESS;

    50     }

    51 }

    53 void *ucx_mempool_malloc(UcxMempool *pool, size_t n) {

    54     ucx_memchunk *mem = (ucx_memchunk*)malloc(sizeof(ucx_destructor) + n);

    55     if (mem == NULL) return NULL;

    57     if (pool->ndata >= pool->size) {

    58         ucx_mempool_chcap(pool, pool->size + 16);

    59      }

    61     mem->destructor = NULL;

    62     pool->data[pool->ndata] = mem;

    63     pool->ndata++;

    65     return &mem->c;

    66 }

    68 void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) {

    69     void *ptr = ucx_mempool_malloc(pool, nelem*elsize);

    70     if(ptr == NULL) {

    71         return NULL;

    72     }

    73     memset(ptr, 0, nelem * elsize);

    74     return ptr;

    75 }

    77 void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) {

    78     void *mem = ((char*)ptr) - sizeof(ucx_destructor);

    79     char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor));

    80     if (newm == NULL) return NULL;

    81     if (mem != newm) {

    82         for(int i=0;i<pool->ndata;i++) {

    83             if(pool->data[i] == mem) {

    84                 pool->data[i] = newm;

    85                 return ((char*) newm) + sizeof(ucx_destructor);

    86             }

    87         }

    88         fprintf(stderr, "FATAL: %8x not in mpool %8x\n", mem, pool);

    89         exit(1);

    90     } else {

    91         return ((char*) newm) + sizeof(ucx_destructor);

    92     }

    93 }

    95 void ucx_mempool_free(UcxMempool *pool) {

    96     ucx_memchunk *chunk;

    97     for(int i=0;i<pool->ndata;i++) {

    98         chunk = (ucx_memchunk*) pool->data[i];

    99         if(chunk->destructor != NULL) {

   100             chunk->destructor(&chunk->c);

   101         }

   102         free(chunk);

   103     }

   104     free(pool->data);

   105     free(pool);

   106 }

   108 void ucx_mempool_set_destr(void *ptr, ucx_destructor func) {

   109     *(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func;

   110 }

   112 void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) {

   113     ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc(

   114             pool,

   115             sizeof(ucx_regdestr));

   116     rd->destructor = destr;

   117     rd->ptr = ptr;

   118     ucx_mempool_set_destr(rd, ucx_mempool_shared_destr);

   119 }

Mercurial > hg > ucx / file revision