# Copyright (c) 2024 BayLibre SAS
#
# SPDX-License-Identifier: Apache-2.0

menu "POSIX memory"

config POSIX_PAGE_SIZE
	hex
	# TODO: something similar and arch-independent for MPUs
	default MMU_PAGE_SIZE if MMU
	default 0x40
	help
	  This option is not user-configurable.

config POSIX_SHARED_MEMORY_OBJECTS
	bool "POSIX shared memory objects [EXPERIMENTAL]"
	select EXPERIMENTAL
	select SYS_HASH_FUNC32
	select SYS_HASH_FUNC32_DJB2
	select FDTABLE
	select POSIX_MAPPED_FILES
	help
	  Select 'y' here and Zephyr will provide implementations of shm_open() and shm_unlink().

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04

config POSIX_MAPPED_FILES
	bool "POSIX memory-mapped files [EXPERIMENTAL]"
	select EXPERIMENTAL
	imply MMU
	help
	  Select 'y' here and Zephyr will provide support for mmap(), msync(), and munmap().

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04

if POSIX_MAPPED_FILES

config POSIX_MEMLOCK
	bool "POSIX memory locking [EXPERIMENTAL]"
	select EXPERIMENTAL
	help
	  Select 'y' here and Zephyr will provide support for mlockall() and munlockall().

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04

config POSIX_MEMLOCK_RANGE
	bool "POSIX range memory locking [EXPERIMENTAL]"
	select EXPERIMENTAL
	imply MMU
	imply DEMAND_PAGING
	help
	  Select 'y' here and Zephyr will provide support for mlock() and munlock().

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04

endif

config POSIX_MEMORY_PROTECTION
	bool "POSIX memory protection [EXPERIMENTAL]"
	select EXPERIMENTAL
	help
	  Select 'y' here and Zephyr will provide support for mprotect().

	  For more information, please see
	  https://pubs.opengroup.org/onlinepubs/9699919799.orig/functions/V2_chap02.html
	  https://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_port.html#tag_24_03_04

endmenu