+++ /dev/null
-/*
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
- *
- * Copyright 2017 Mike Becker, 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>&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;
-
-#ifdef __cplusplus
-extern "C"
-#endif
-void ucx_mempool_shared_destr(void* ptr) {
- ucx_regdestr *rd = (ucx_regdestr*)ptr;
- rd->destructor(rd->ptr);
-}
-
-UcxMempool *ucx_mempool_new(size_t n) {
- size_t poolsz;
- if(ucx_szmul(n, sizeof(void*), &poolsz)) {
- return NULL;
- }
-
- UcxMempool *pool = (UcxMempool*)malloc(sizeof(UcxMempool));
- if (!pool) {
- return NULL;
- }
-
- pool->data = (void**) malloc(poolsz);
- 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;
- }
-
- size_t newcapsz;
- if(ucx_szmul(newcap, sizeof(void*), &newcapsz)) {
- return 1;
- }
-
- void **data = (void**) realloc(pool->data, newcapsz);
- if (data) {
- pool->data = data;
- pool->size = newcap;
- return 0;
- } else {
- return 1;
- }
-}
-
-void *ucx_mempool_malloc(UcxMempool *pool, size_t n) {
- if(((size_t)-1) - sizeof(ucx_destructor) < n) {
- return NULL;
- }
-
- 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) {
- size_t msz;
- if(ucx_szmul(nelem, elsize, &msz)) {
- return NULL;
- }
-
- void *ptr = ucx_mempool_malloc(pool, msz);
- if (!ptr) {
- return NULL;
- }
- memset(ptr, 0, nelem * elsize);
- return ptr;
-}
-
-void *ucx_mempool_realloc(UcxMempool *pool, void *ptr, size_t n) {
- if(((size_t)-1) - sizeof(ucx_destructor) < n) {
- return NULL;
- }
-
- 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);
-}
-
develop.uap-core.de/git / uwplayer.git / blobdiff