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/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* The Original Code is librabbitmq.
*
* The Initial Developer of the Original Code is VMware, Inc.
* Portions created by VMware are Copyright (c) 2007-2011 VMware, Inc.
*
* Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
* VMware, Inc. and Tony Garnock-Jones.
*
* All rights reserved.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License Version 2 or later (the "GPL"), in
* which case the provisions of the GPL are applicable instead of those
* above. If you wish to allow use of your version of this file only
* under the terms of the GPL, and not to allow others to use your
* version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the
* notice and other provisions required by the GPL. If you do not
* delete the provisions above, a recipient may use your version of
* this file under the terms of any one of the MPL or the GPL.
*
* ***** END LICENSE BLOCK *****
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <assert.h>
#include "amqp.h"
#include "config.h"
char const *amqp_version(void) {
return VERSION; /* defined in config.h */
}
void init_amqp_pool(amqp_pool_t *pool, size_t pagesize) {
pool->pagesize = pagesize ? pagesize : 4096;
pool->pages.num_blocks = 0;
pool->pages.blocklist = NULL;
pool->large_blocks.num_blocks = 0;
pool->large_blocks.blocklist = NULL;
pool->next_page = 0;
pool->alloc_block = NULL;
pool->alloc_used = 0;
}
static void empty_blocklist(amqp_pool_blocklist_t *x) {
int i;
for (i = 0; i < x->num_blocks; i++) {
free(x->blocklist[i]);
}
if (x->blocklist != NULL) {
free(x->blocklist);
}
x->num_blocks = 0;
x->blocklist = NULL;
}
void recycle_amqp_pool(amqp_pool_t *pool) {
empty_blocklist(&pool->large_blocks);
pool->next_page = 0;
pool->alloc_block = NULL;
pool->alloc_used = 0;
}
void empty_amqp_pool(amqp_pool_t *pool) {
recycle_amqp_pool(pool);
empty_blocklist(&pool->pages);
}
/* Returns 1 on success, 0 on failure */
static int record_pool_block(amqp_pool_blocklist_t *x, void *block) {
size_t blocklistlength = sizeof(void *) * (x->num_blocks + 1);
if (x->blocklist == NULL) {
x->blocklist = malloc(blocklistlength);
if (x->blocklist == NULL)
return 0;
} else {
void *newbl = realloc(x->blocklist, blocklistlength);
if (newbl == NULL)
return 0;
x->blocklist = newbl;
}
x->blocklist[x->num_blocks] = block;
x->num_blocks++;
return 1;
}
void *amqp_pool_alloc(amqp_pool_t *pool, size_t amount) {
if (amount == 0) {
return NULL;
}
amount = (amount + 7) & (~7); /* round up to nearest 8-byte boundary */
if (amount > pool->pagesize) {
void *result = calloc(1, amount);
if (result == NULL) {
return NULL;
}
if (!record_pool_block(&pool->large_blocks, result))
return NULL;
return result;
}
if (pool->alloc_block != NULL) {
assert(pool->alloc_used <= pool->pagesize);
if (pool->alloc_used + amount <= pool->pagesize) {
void *result = pool->alloc_block + pool->alloc_used;
pool->alloc_used += amount;
return result;
}
}
if (pool->next_page >= pool->pages.num_blocks) {
pool->alloc_block = calloc(1, pool->pagesize);
if (pool->alloc_block == NULL) {
return NULL;
}
if (!record_pool_block(&pool->pages, pool->alloc_block))
return NULL;
pool->next_page = pool->pages.num_blocks;
} else {
pool->alloc_block = pool->pages.blocklist[pool->next_page];
pool->next_page++;
}
pool->alloc_used = amount;
return pool->alloc_block;
}
void amqp_pool_alloc_bytes(amqp_pool_t *pool, size_t amount, amqp_bytes_t *output) {
output->len = amount;
output->bytes = amqp_pool_alloc(pool, amount);
}
amqp_bytes_t amqp_cstring_bytes(char const *cstr) {
amqp_bytes_t result;
result.len = strlen(cstr);
result.bytes = (void *) cstr;
return result;
}
amqp_bytes_t amqp_bytes_malloc_dup(amqp_bytes_t src) {
amqp_bytes_t result;
result.len = src.len;
result.bytes = malloc(src.len);
if (result.bytes != NULL) {
memcpy(result.bytes, src.bytes, src.len);
}
return result;
}
amqp_bytes_t amqp_bytes_malloc(size_t amount) {
amqp_bytes_t result;
result.len = amount;
result.bytes = malloc(amount); /* will return NULL if it fails */
return result;
}
void amqp_bytes_free(amqp_bytes_t bytes) {
free(bytes.bytes);
}
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