kconfig

xenomai 很好的linux实时补丁

config XENO_SKIN_NATIVE
	depends on XENO_OPT_NUCLEUS
	tristate "Native API"
	default y
	help

	The native Xenomai API.

if XENO_SKIN_NATIVE != n

config XENO_OPT_NATIVE_PIPE
	bool "Message pipes"
	depends on XENO_OPT_PIPE
	default y
	help
	
	Message pipes are bi-directional FIFO communication
	channels allowing data exchange between real-time tasks
	and regular user-space processes. Pipes natively preserve
	message boundaries, but can also be used in byte stream mode
	from kernel to user space.

	The maximum number of pipes available in the system can be
	configured using the XENO_OPT_PIPE_NRDEV option from the
	Nucleus menu.

config XENO_OPT_NATIVE_PIPE_BUFSZ
	int "Bytes in buffer space"
	depends on XENO_OPT_NATIVE_PIPE
	default 4096
	help
	
	This option sets the memory size available for per-pipe
	buffering when message pipes are used in byte stream mode.

config XENO_OPT_NATIVE_SEM
	bool "Counting semaphores"
	default y
	help
	
	Counting semaphore are synchronization objects granting Xenomai
	tasks a concurrent access to a given number of resources
	maintained in an internal counter variable.

config XENO_OPT_NATIVE_EVENT
	bool "Event flags"
	default y
	help
	
	Event flag groups are synchronization objects represented by a
	long-word structure; every available bit in such word can be used
	to map a user-defined event flag Xenomai tasks can wait for.

config XENO_OPT_NATIVE_MUTEX
	bool "Mutexes"
	default y if XENO_OPT_NATIVE_COND=y
	help
	
	Mutexes are MUTual EXclusion objects, useful for protecting
	shared data structures from concurrent modifications, and
	implementing critical sections and monitors.

config XENO_OPT_NATIVE_COND
	bool "Condition variables"
	default y
	enable XENO_OPT_NATIVE_MUTEX
	help
	
	Condition variables are synchronization objects which
	allow Xenomai tasks to suspend execution until some predicate on
	shared data is satisfied. 

config XENO_OPT_NATIVE_QUEUE
	bool "Message queues"
	default y
	help
	
	Message queueing is a method by which real-time tasks can
	exchange or pass data through a xeno-managed queue of
	messages. Messages can vary in length and be assigned
	different types or usages.

config XENO_OPT_NATIVE_HEAP
	bool "Memory heaps"
	default y
	help

	Memory heaps are regions of memory used for dynamic memory
	allocation in a time-bounded fashion.

config XENO_OPT_NATIVE_ALARM
	bool "Alarms"
	default y
	help
	
	Alarms are general watchdog timers allowing to run
	user-defined handlers after a specified delay has elapsed.

config XENO_OPT_NATIVE_MPS
	bool "Message passing support"
	default y
	help
	
	This simple message passing interface allows to exchange
	variable-sized messages in a synchronous fashion between Xenomai
	tasks.

config XENO_OPT_NATIVE_INTR
	bool "Interrupts"
	help
	
	This option provides a simple API to deal with interrupts,
	both in kernel and user-space contexts. Note that the preferred
	way of implementing generic drivers usable across all Xenomai
	interfaces is defined by the Real-Time Driver Model (RTDM).

endif