Commit graph

3 commits

Author SHA1 Message Date
Keith Packard
706d9f6db2 libc/common: Use static initializer for z_malloc_heap_mutex
Instead of explicitly initializing the mutex at runtime, use
SYS_MUTEX_DEFINE to initialize it at build time instead.

Signed-off-by: Keith Packard <keithp@keithp.com>
2023-05-11 01:25:01 +09:00
Keith Packard
32a437cbc8 libc/common: Handle MMU/MPU/USERSPACE and alignment requirements in malloc
When CONFIG_COMMON_LIBC_MALLOC_ARENA_SIZE is set to -1, make the malloc
arena use all remaining RAM. When an MMU exists, allocate the arena at
startup using k_mem_map. Otherwise, compute the available memory
automatically and use that.

When an MPU is being used to manage the malloc arena, make sure the heap
respects any MPU alignment requirements. Otherwise, align the heap to
sizeof(double).

Signed-off-by: Keith Packard <keithp@keithp.com>
2023-05-09 01:29:16 +09:00
Keith Packard
a9c62caab7 lib/libc: Move malloc from minimal to common library
This will (eventually) permit use of a common malloc implementation with
other C libraries, reducing the amount of Zephyr-specific code required
to support each C library.

Signed-off-by: Keith Packard <keithp@keithp.com>
2023-04-27 20:17:24 +09:00
Renamed from lib/libc/minimal/source/stdlib/malloc.c (Browse further)