POSIX Application Environment Profiles (AEP)

Although inactive, IEEE 1003.13-2003 defined a number of AEP that inspired the modern subprofiling options of IEEE 1003.1-2017. The single-purpose realtime system profiles are listed below, for reference, in terms that agree with the current POSIX-1 standard.

Choosing a profile with CONFIG_POSIX_AEP_CHOICE_PSE51 and friends enables every Option Group and Option in the corresponding tables by default; any of them may be disabled individually. The profile’s macro (_POSIX_AEP_REALTIME_MINIMAL and so on) is defined only while all of them remain enabled.

System Interfaces

The required POSIX System Interfaces are supported by each Application Environment Profile.

System Interfaces
Symbol	Support	Remarks
_POSIX_VERSION	200809L	`CONFIG_POSIX_SYSTEM_INTERFACES`

Required POSIX System Interfaces
Symbol	Support	Remarks
_POSIX_ASYNCHRONOUS_IO	200809L	`CONFIG_POSIX_ASYNCHRONOUS_IO`
_POSIX_BARRIERS	200809L	`CONFIG_POSIX_BARRIERS`
_POSIX_CLOCK_SELECTION	200809L	`CONFIG_POSIX_CLOCK_SELECTION`
_POSIX_MAPPED_FILES	200809L	`CONFIG_POSIX_MAPPED_FILES`
_POSIX_MEMORY_PROTECTION	200809L	`CONFIG_POSIX_MEMORY_PROTECTION`
_POSIX_READER_WRITER_LOCKS	200809L	`CONFIG_POSIX_RW_LOCKS`
_POSIX_REALTIME_SIGNALS	200809L	`CONFIG_POSIX_REALTIME_SIGNALS`
_POSIX_SEMAPHORES	200809L	`CONFIG_POSIX_SEMAPHORES`
_POSIX_SPIN_LOCKS	200809L	`CONFIG_POSIX_SPIN_LOCKS`
_POSIX_THREAD_SAFE_FUNCTIONS	200809L	`CONFIG_POSIX_C_LANG_SUPPORT_R` or `CONFIG_POSIX_FILE_SYSTEM_R` or `CONFIG_POSIX_FILE_LOCKING` or `CONFIG_POSIX_SYSTEM_DATABASE_R`
_POSIX_THREADS	200809L	`CONFIG_POSIX_THREADS`
_POSIX_TIMEOUTS	200809L	`CONFIG_POSIX_TIMERS`
_POSIX_TIMERS	200809L	`CONFIG_POSIX_TIMERS`

Minimal Realtime System Profile (PSE51)

The Minimal Realtime System Profile (PSE51) includes all of the System Interfaces along with several additional features.

PSE51 System Interfaces
Symbol	Support	Remarks
_POSIX_AEP_REALTIME_MINIMAL	200312L	`CONFIG_POSIX_AEP_REALTIME_MINIMAL`

PSE51 Option Groups
Symbol	Support	Remarks
POSIX_DEVICE_IO	yes	`CONFIG_POSIX_DEVICE_IO`
POSIX_FILE_LOCKING	yes	`CONFIG_POSIX_FILE_LOCKING`
POSIX_SIGNALS	yes	`CONFIG_POSIX_SIGNALS`
POSIX_SINGLE_PROCESS	yes	`CONFIG_POSIX_SINGLE_PROCESS`
POSIX_THREADS_EXT	yes	`CONFIG_POSIX_THREADS_EXT`

PSE51 Option Requirements
Symbol	Support	Remarks
_POSIX_FSYNC	200809L	`CONFIG_POSIX_FSYNC`
_POSIX_MEMLOCK	200809L	`CONFIG_POSIX_MEMLOCK`
_POSIX_MEMLOCK_RANGE	200809L	`CONFIG_POSIX_MEMLOCK_RANGE`
_POSIX_SHARED_MEMORY_OBJECTS	200809L	`CONFIG_POSIX_SHARED_MEMORY_OBJECTS`
_POSIX_SYNCHRONIZED_IO	200809L	`CONFIG_POSIX_SYNCHRONIZED_IO`
_POSIX_THREAD_ATTR_STACKADDR	200809L	`CONFIG_POSIX_THREAD_ATTR_STACKADDR`
_POSIX_THREAD_ATTR_STACKSIZE	200809L	`CONFIG_POSIX_THREAD_ATTR_STACKSIZE`
_POSIX_THREAD_CPUTIME	200809L	`CONFIG_POSIX_THREAD_CPUTIME`
_POSIX_THREAD_PRIO_INHERIT	200809L	`CONFIG_POSIX_THREAD_PRIO_INHERIT`
_POSIX_THREAD_PRIO_PROTECT	200809L	`CONFIG_POSIX_THREAD_PRIO_PROTECT`
_POSIX_THREAD_PRIORITY_SCHEDULING	200809L	`CONFIG_POSIX_THREAD_PRIORITY_SCHEDULING`
_POSIX_THREAD_SPORADIC_SERVER	200809L	`CONFIG_POSIX_THREAD_SPORADIC_SERVER` †

Note

_POSIX_THREAD_SPORADIC_SERVER support is present for linking and argument verification, but is otherwise unimplemented. See Sporadic Server Scheduling for additional information.

Realtime Controller System Profile (PSE52)

The Realtime Controller System Profile (PSE52) includes all features from PSE51 and the System Interfaces.

PSE52 System Interfaces
Symbol	Support	Remarks
_POSIX_AEP_REALTIME_CONTROLLER	200312L	`CONFIG_POSIX_AEP_REALTIME_CONTROLLER`

PSE52 Option Groups
Symbol	Support	Remarks
POSIX_C_LANG_MATH	yes
POSIX_FD_MGMT	yes	`CONFIG_POSIX_FD_MGMT`
POSIX_FILE_SYSTEM	yes	`CONFIG_POSIX_FILE_SYSTEM` †

PSE52 Option Requirements
Symbol	Support	Remarks
_POSIX_MESSAGE_PASSING	200809L	`CONFIG_POSIX_MESSAGE_PASSING`

Note

When using Newlib, Picolibc, or other C libraries conforming to the ISO C Standard, the POSIX_C_LANG_MATH Option Group is considered supported since C11.

Note

POSIX tracing appeared in IEEE 1003.13 but was removed from the specification in Issue 8 and is not listed here as a PSE52 option requirement †.

Dedicated Realtime System Profile (PSE53)

The Dedicated Realtime System Profile (PSE53) includes all features from PSE52, PSE51, and the System Interfaces.

PSE53 System Interfaces
Symbol	Support	Remarks
_POSIX_AEP_REALTIME_DEDICATED	200312L	`CONFIG_POSIX_AEP_REALTIME_DEDICATED`

PSE53 Option Groups
Symbol	Support	Remarks
POSIX_MULTI_PROCESS	yes	`CONFIG_POSIX_MULTI_PROCESS`
POSIX_NETWORKING	yes	`CONFIG_POSIX_NETWORKING` †
POSIX_PIPE	yes	`CONFIG_POSIX_PIPE`
POSIX_SIGNAL_JUMP	yes	`CONFIG_POSIX_SIGNAL_JUMP`

PSE53 Option Requirements
Symbol	Support	Remarks
_POSIX_CPUTIME	200809L	`CONFIG_POSIX_CPUTIME`
_POSIX_PRIORITIZED_IO	200809L	`CONFIG_POSIX_PRIORITIZED_IO`
_POSIX_PRIORITY_SCHEDULING	200809L	`CONFIG_POSIX_PRIORITY_SCHEDULING`
_POSIX_RAW_SOCKETS	200809L	`CONFIG_POSIX_RAW_SOCKETS`
_POSIX_SPAWN	200809L	`CONFIG_POSIX_SPAWN`
_POSIX_SPORADIC_SERVER	200809L	`CONFIG_POSIX_SPORADIC_SERVER` †

Note

_POSIX_SPORADIC_SERVER support is present for linking and argument verification, but is otherwise unimplemented. See Sporadic Server Scheduling for additional information.

Note

In the Option Groups tables above, a blank Support cell with a Kconfig remark means the profile enables that option group but it is not fully implemented. yes means the group is considered fully supported. See each group page for per-API detail.

Note

PSE54 is not considered at this time.