ucx: ucx/mempool.c@e18157c52985

     1 /*

     2  *

     3  */

     5 #include <stdlib.h>

     6 #include <string.h>

     7 #include <stdio.h>

     9 #include "mempool.h"

    11 typedef struct {

    12     ucx_destructor destructor;

    13     char c;

    14 } ucx_memchunk;

    16 typedef struct {

    17     ucx_destructor destructor;

    18     void           *ptr;

    19 } ucx_regdestr;

    21 void ucx_mempool_shared_destr(void* ptr) {

    22     ucx_regdestr *rd = (ucx_regdestr*)ptr;

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

    24 }

    26 UcxMempool *ucx_mempool_new(size_t n) {

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

    28     if (pool == NULL) return NULL;

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

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

    32         free(pool);

    33         return NULL;

    34     }

    36     pool->ndata = 0;

    37     pool->size = n;

    38     return pool;

    39 }

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

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

    43     if (data == NULL) {

    44         return 1;

    45     } else {

    46         pool->data = data;

    47         pool->size = newcap;

    48         return EXIT_SUCCESS;

    49     }

    50 }

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

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

    54     if (mem == NULL) return NULL;

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

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

    58      }

    60     mem->destructor = NULL;

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

    62     pool->ndata++;

    64     return &mem->c;

    65 }

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

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

    69     if(ptr == NULL) {

    70         return NULL;

    71     }

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

    73     return ptr;

    74 }

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

    77     char *mem = ((char*)ptr) - sizeof(ucx_destructor);

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

    79     if (newm == NULL) return NULL;

    80     if (mem != newm) {

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

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

    83                 pool->data[i] = newm;

    84                 return newm + sizeof(ucx_destructor);

    85             }

    86         }

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

    88         exit(1);

    89     } else {

    90         return newm + sizeof(ucx_destructor);

    91     }

    92 }

    94 void ucx_mempool_free(UcxMempool *pool) {

    95     ucx_memchunk *chunk;

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

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

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

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

   100         }

   101         free(chunk);

   102     }

   103     free(pool->data);

   104     free(pool);

   105 }

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

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

   109 }

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

   112     ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc(

   113             pool,

   114             sizeof(ucx_regdestr));

   115     rd->destructor = destr;

   116     rd->ptr = ptr;

   117     ucx_mempool_set_destr(rd, ucx_mempool_shared_destr);

   118 }

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