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kernel: Add k_heap synchronized memory allocator

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This adds a k_heap data structure, a synchronized wrapper around a
sys_heap memory allocator.  As of this patch, it is an alternative
implementation to k_mem_pool() with somewhat better efficiency and
performance and more conventional (and convenient) behavior.

Note that commit involves some header motion to break dependencies.
The declaration for struct k_spinlock moves to kernel_structs.h, and a
bunch of includes were trimmed.

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This commit is contained in:
Andy Ross 2020-04-03 10:01:03 -07:00 • committed by Andrew Boie
commit 0dd83b8c2e
8 changed files with 180 additions and 33 deletions
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7
include/linker/common-ram.ld
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@ -76,6 +76,13 @@
_k_mem_pool_list_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
SECTION_DATA_PROLOGUE(_k_heap_area,,SUBALIGN(4))
{
_k_heap_list_start = .;
KEEP(*("._k_heap.static.*"))
_k_heap_list_end = .;
} GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
SECTION_DATA_PROLOGUE(_k_sem_area,,SUBALIGN(4))
{
_k_sem_list_start = .;