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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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
* OWNER 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 "tb_mem.h"
/*
* Memory management routines for temporary memory.
* That memory is used only during build phase and is released after
* build is finished.
* Note, that tb_pool/tb_alloc() are not supposed to return NULL.
* Instead, in the case of failure to allocate memory,
* it would do siglongjmp(pool->fail).
* It is responsibility of the caller to save the proper context/environment,
* in the pool->fail before calling tb_alloc() for the given pool first time.
*/
static struct tb_mem_block *
tb_pool(struct tb_mem_pool *pool, size_t sz)
{
struct tb_mem_block *block;
uint8_t *ptr;
size_t size;
size = sz + pool->alignment - 1;
block = calloc(1, size + sizeof(*pool->block));
if (block == NULL) {
RTE_LOG(ERR, MALLOC, "%s(%zu)\n failed, currently allocated "
"by pool: %zu bytes\n", __func__, sz, pool->alloc);
siglongjmp(pool->fail, -ENOMEM);
return NULL;
}
block->pool = pool;
block->next = pool->block;
pool->block = block;
pool->alloc += size;
ptr = (uint8_t *)(block + 1);
block->mem = RTE_PTR_ALIGN_CEIL(ptr, pool->alignment);
block->size = size - (block->mem - ptr);
return block;
}
void *
tb_alloc(struct tb_mem_pool *pool, size_t size)
{
struct tb_mem_block *block;
void *ptr;
size_t new_sz;
size = RTE_ALIGN_CEIL(size, pool->alignment);
block = pool->block;
if (block == NULL || block->size < size) {
new_sz = (size > pool->min_alloc) ? size : pool->min_alloc;
block = tb_pool(pool, new_sz);
}
ptr = block->mem;
block->size -= size;
block->mem += size;
return ptr;
}
void
tb_free_pool(struct tb_mem_pool *pool)
{
struct tb_mem_block *next, *block;
for (block = pool->block; block != NULL; block = next) {
next = block->next;
free(block);
}
pool->block = NULL;
pool->alloc = 0;
}
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