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unified: Add k_mem_map_num_free_get()

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Complements existing k_mem_map_num_used_get().

Change-Id: Ie69c0a8e30007e365820448bde48303718369904
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
This commit is contained in:
Peter Mitsis 2016-10-13 13:53:37 -04:00 • committed by Benjamin Walsh
commit c001aa8ef6
2 changed files with 17 additions and 0 deletions
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1
doc/kernel_v2/memory/maps.rst
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@ -142,3 +142,4 @@ The following memory map APIs are provided by :file:`kernel.h`:
* :cpp:func:`k_mem_map_alloc()` * :cpp:func:`k_mem_map_alloc()`
* :cpp:func:`k_mem_map_free()` * :cpp:func:`k_mem_map_free()`
* :cpp:func:`k_mem_map_num_used_get()` * :cpp:func:`k_mem_map_num_used_get()`
* :cpp:func:`k_mem_map_num_free_get()`

16
include/kernel.h
View file

@ -1225,6 +1225,22 @@ static inline int k_mem_map_num_used_get(struct k_mem_map *map)
return map->num_used; return map->num_used;
} }
/**
* @brief Get the number of unused memory blocks
*
* This routine gets the current number of unused memory blocks in the
* specified pool. It should be used for stats purposes only as that value
* may potentially be out-of-date by the time it is used.
*
* @param map Memory map to query
*
* @return Number of unused memory blocks
*/
static inline int k_mem_map_num_free_get(struct k_mem_map *map)
{
return map->num_blocks - map->num_used;
}
/* memory pools */ /* memory pools */
/* /*