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kernel: Make heap smallest object size configurable

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Allow application to chose the size of the smallest object taken from
the heap.

Signed-off-by: Pawel Dunaj <pawel.dunaj@nordicsemi.no>
This commit is contained in:
Pawel Dunaj 2019-03-11 17:28:23 +01:00 • committed by Carles Cufí
commit b87920bf3c
2 changed files with 11 additions and 1 deletions
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9
kernel/Kconfig
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@ -485,6 +485,15 @@ config HEAP_MEM_POOL_SIZE
dynamically allocating memory using k_malloc(). Supported values
are: 256, 1024, 4096, and 16384. A size of zero means that no
heap memory pool is defined.
config HEAP_MEM_POOL_MIN_SIZE
int "The smallest blocks in the heap memory pool (in bytes)"
depends on HEAP_MEM_POOL_SIZE != 0
default 64
help
This option specifies the size of the smallest block in the pool.
Option must be a power of 2 and lower than or equal to the size
of the entire pool.
endmenu
config ARCH_HAS_CUSTOM_SWAP_TO_MAIN

3
kernel/mempool.c
View file

@ -179,7 +179,8 @@ void k_free(void *ptr)
* that has the address of the associated memory pool struct.
*/
K_MEM_POOL_DEFINE(_heap_mem_pool, 64, CONFIG_HEAP_MEM_POOL_SIZE, 1, 4);
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)