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mempool: Don't store redundant information for k_malloc/k_free

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We don't need to store the full k_mem_block, rather just the
k_mem_block_id. In effect, this saves 4 bytes of memory per allocated
memory chunk. Also take advantage of the newly introduced
k_mem_pool_free_id API here.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Johan Hedberg 2018-01-11 20:47:08 +02:00 committed by Anas Nashif
parent 7d887cb615
commit 1a8a8d9019
1 changed files with 5 additions and 5 deletions
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10
kernel/mempool.c
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@ -387,16 +387,16 @@ void *k_malloc(size_t size)
* get a block large enough to hold an initial (hidden) block
* descriptor, as well as the space the caller requested
*/
size += sizeof(struct k_mem_block);
size += sizeof(struct k_mem_block_id);
if (k_mem_pool_alloc(_HEAP_MEM_POOL, &block, size, K_NO_WAIT) != 0) {
return NULL;
}
/* save the block descriptor info at the start of the actual block */
memcpy(block.data, &block, sizeof(struct k_mem_block));
memcpy(block.data, &block.id, sizeof(struct k_mem_block_id));
/* return address of the user area part of the block to the caller */
return (char *)block.data + sizeof(struct k_mem_block);
return (char *)block.data + sizeof(struct k_mem_block_id);
}
@ -404,10 +404,10 @@ void k_free(void *ptr)
{
if (ptr != NULL) {
/* point to hidden block descriptor at start of block */
ptr = (char *)ptr - sizeof(struct k_mem_block);
ptr = (char *)ptr - sizeof(struct k_mem_block_id);
/* return block to the heap memory pool */
k_mem_pool_free(ptr);
k_mem_pool_free_id(ptr);
}
}