blob: 304b39f56830c4b20cd16f77d31f0bd42f81ee66 [file] [log] [blame]
/*
* Copyright (c) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <kernel.h>
#include <string.h>
#include <sys/math_extras.h>
void k_mem_pool_free(struct k_mem_block *block)
{
k_mem_pool_free_id(&block->id);
}
void *k_mem_pool_malloc(struct k_mem_pool *pool, size_t size)
{
struct k_mem_block block;
/*
* get a block large enough to hold an initial (hidden) block
* descriptor, as well as the space the caller requested
*/
if (size_add_overflow(size, WB_UP(sizeof(struct k_mem_block_id)),
&size)) {
return NULL;
}
if (k_mem_pool_alloc(pool, &block, size, K_NO_WAIT) != 0) {
return NULL;
}
/* save the block descriptor info at the start of the actual block */
(void)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 + WB_UP(sizeof(struct k_mem_block_id));
}
void k_free(void *ptr)
{
if (ptr != NULL) {
/* point to hidden block descriptor at start of block */
ptr = (char *)ptr - WB_UP(sizeof(struct k_mem_block_id));
/* return block to the heap memory pool */
k_mem_pool_free_id(ptr);
}
}
#if (CONFIG_HEAP_MEM_POOL_SIZE > 0)
/*
* Heap is defined using HEAP_MEM_POOL_SIZE configuration option.
*
* This module defines the heap memory pool and the _HEAP_MEM_POOL symbol
* that has the address of the associated memory pool struct.
*/
K_MEM_POOL_DEFINE(_heap_mem_pool, CONFIG_HEAP_MEM_POOL_MIN_SIZE,
CONFIG_HEAP_MEM_POOL_SIZE, 1, 4);
#define _HEAP_MEM_POOL (&_heap_mem_pool)
void *k_malloc(size_t size)
{
return k_mem_pool_malloc(_HEAP_MEM_POOL, size);
}
void *k_calloc(size_t nmemb, size_t size)
{
void *ret;
size_t bounds;
if (size_mul_overflow(nmemb, size, &bounds)) {
return NULL;
}
ret = k_malloc(bounds);
if (ret != NULL) {
(void)memset(ret, 0, bounds);
}
return ret;
}
void k_thread_system_pool_assign(struct k_thread *thread)
{
thread->resource_pool = _HEAP_MEM_POOL;
}
#else
#define _HEAP_MEM_POOL NULL
#endif
void *z_thread_malloc(size_t size)
{
void *ret;
struct k_mem_pool *pool;
if (k_is_in_isr()) {
pool = _HEAP_MEM_POOL;
} else {
pool = _current->resource_pool;
}
if (pool) {
ret = k_mem_pool_malloc(pool, size);
} else {
ret = NULL;
}
return ret;
}