ucx: comparison src/mempool.c

-:b7d1317b138e
+:fae240d633fc
+/*
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+*
+* Copyright 2017 Olaf Wintermann. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*
+*   1. Redistributions of source code must retain the above copyright
+*      notice, this list of conditions and the following disclaimer.
+*
+*   2. Redistributions in binary form must reproduce the above copyright
+*      notice, this list of conditions and the following disclaimer in the
+*      documentation and/or other materials provided with the distribution.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.
+*/
+#include "ucx/mempool.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#ifdef __cplusplus
+#define __STDC_FORMAT_MACROS
+#endif
+#include <inttypes.h>
+/** Capsule for destructible memory chunks. */
+typedef struct {
+/** The destructor for the memory chunk. */
+ucx_destructor destructor;
+/**
+* First byte of the memory chunk.
+* Note, that the address <code>&amp;c</code> is also the address
+* of the whole memory chunk.
+*/
+char c;
+} ucx_memchunk;
+/** Capsule for data and its destructor. */
+typedef struct {
+/** The destructor for the data. */
+ucx_destructor destructor;
+/** A pointer to the data. */
+void           *ptr;
+} ucx_regdestr;
+UCX_EXTERN void ucx_mempool_shared_destr(void* ptr) {
+ucx_regdestr *rd = (ucx_regdestr*)ptr;
+rd->destructor(rd->ptr);
+}
+UcxMempool *ucx_mempool_new(size_t n) {
+UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool));
+if (!pool) {
+return NULL;
+}
+pool->data = (void**) malloc(n * sizeof(void*));
+if (pool->data == NULL) {
+free(pool);
+return NULL;
+}
+pool->ndata = 0;
+pool->size = n;
+UcxAllocator *allocator = (UcxAllocator*)malloc(sizeof(UcxAllocator));
+if(!allocator) {
+free(pool->data);
+free(pool);
+return NULL;
+}
+allocator->malloc = (ucx_allocator_malloc)ucx_mempool_malloc;
+allocator->calloc = (ucx_allocator_calloc)ucx_mempool_calloc;
+allocator->realloc = (ucx_allocator_realloc)ucx_mempool_realloc;
+allocator->free = (ucx_allocator_free)ucx_mempool_free;
+allocator->pool = pool;
+pool->allocator = allocator;
+return pool;
+}
+int ucx_mempool_chcap(UcxMempool *pool, size_t newcap) {
+if (newcap < pool->ndata) {
+return 1;
+}
+void **data = (void**) realloc(pool->data, newcap*sizeof(void*));
+if (data) {
+pool->data = data;
+pool->size = newcap;
+return 0;
+} else {
+return 1;
+}
+}
+void *ucx_mempool_malloc(UcxMempool *pool, size_t n) {
+if (pool->ndata >= pool->size) {
+size_t newcap = pool->size*2;
+if (newcap < pool->size || ucx_mempool_chcap(pool, newcap)) {
+return NULL;
+}
+}
+void *p = malloc(sizeof(ucx_destructor) + n);
+ucx_memchunk *mem = (ucx_memchunk*)p;
+if (!mem) {
+return NULL;
+}
+mem->destructor = NULL;
+pool->data[pool->ndata] = mem;
+pool->ndata++;
+return &(mem->c);
+}
+void *ucx_mempool_calloc(UcxMempool *pool, size_t nelem, size_t elsize) {
+void *ptr = ucx_mempool_malloc(pool, nelem*elsize);
+if (!ptr) {
+return NULL;
+}
+memset(ptr, 0, nelem * elsize);
+return ptr;
+}
+void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) {
+char *mem = ((char*)ptr) - sizeof(ucx_destructor);
+char *newm = (char*) realloc(mem, n + sizeof(ucx_destructor));
+if (!newm) {
+return NULL;
+}
+if (mem != newm) {
+for(size_t i=0 ; i < pool->ndata ; i++) {
+if(pool->data[i] == mem) {
+pool->data[i] = newm;
+return newm + sizeof(ucx_destructor);
+}
+}
+fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
+(intptr_t)ptr, (intptr_t)pool);
+abort();
+} else {
+return newm + sizeof(ucx_destructor);
+}
+}
+void ucx_mempool_free(UcxMempool *pool, void *ptr) {
+ucx_memchunk *chunk = (ucx_memchunk*)((char*)ptr-sizeof(ucx_destructor));
+for(size_t i=0 ; i<pool->ndata ; i++) {
+if(chunk == pool->data[i]) {
+if(chunk->destructor != NULL) {
+chunk->destructor(&(chunk->c));
+}
+free(chunk);
+size_t last_index = pool->ndata - 1;
+if(i != last_index) {
+pool->data[i] = pool->data[last_index];
+pool->data[last_index] = NULL;
+}
+pool->ndata--;
+return;
+}
+}
+fprintf(stderr, "FATAL: 0x%08" PRIxPTR" not in mpool 0x%08" PRIxPTR"\n",
+(intptr_t)ptr, (intptr_t)pool);
+abort();
+}
+void ucx_mempool_destroy(UcxMempool *pool) {
+ucx_memchunk *chunk;
+for(size_t i=0 ; i<pool->ndata ; i++) {
+chunk = (ucx_memchunk*) pool->data[i];
+if(chunk) {
+if(chunk->destructor) {
+chunk->destructor(&(chunk->c));
+}
+free(chunk);
+}
+}
+free(pool->data);
+free(pool->allocator);
+free(pool);
+}
+void ucx_mempool_set_destr(void *ptr, ucx_destructor func) {
+*(ucx_destructor*)((char*)ptr-sizeof(ucx_destructor)) = func;
+}
+void ucx_mempool_reg_destr(UcxMempool *pool, void *ptr, ucx_destructor destr) {
+ucx_regdestr *rd = (ucx_regdestr*)ucx_mempool_malloc(
+pool,
+sizeof(ucx_regdestr));
+rd->destructor = destr;
+rd->ptr = ptr;
+ucx_mempool_set_destr(rd, ucx_mempool_shared_destr);
+}

Mercurial > hg > ucx / file comparison

comparison: src/mempool.c

src/mempool.c