Signals

Collaboration diagram for Signals:

Topics
	Producer
	Consumer

Functions
long	l4shmc_add_signal (l4shmc_area_t *shmarea, char const *signal_name, l4shmc_signal_t *signal)
	Add a signal for the shared memory area.
long	l4shmc_attach_signal (l4shmc_area_t *shmarea, char const *signal_name, l4_cap_idx_t thread, l4shmc_signal_t *signal)
	Attach to signal.
long	l4shmc_get_signal (l4shmc_area_t *shmarea, char const *signal_name, l4shmc_signal_t *signal)
	Get signal object from the shared memory area.
l4_cap_idx_t	l4shmc_signal_cap (l4shmc_signal_t const *signal)
	Get the signal capability of a signal.
long	l4shmc_check_magic (l4shmc_chunk_t const *chunk)
	Check magic value of a chunk.

Detailed Description

Function Documentation

l4shmc_add_signal()

long l4shmc_add_signal	(	l4shmc_area_t *	shmarea,
		char const *	signal_name,
		l4shmc_signal_t *	signal )

Add a signal for the shared memory area.

Parameters

	shmarea	The shared memory area.
	signal_name	Name of the signal.
[out]	signal	Signal structure to fill in.

Return values

0	Success.
<0	Error.

Examples

examples/libs/shmc/prodcons.c.

References L4_CV, and L4_INLINE.

l4shmc_attach_signal()

long l4shmc_attach_signal	(	l4shmc_area_t *	shmarea,
		char const *	signal_name,
		l4_cap_idx_t	thread,
		l4shmc_signal_t *	signal )

Attach to signal.

Parameters

	shmarea	Shared memory area.
	signal_name	Name of the signal.
	thread	Thread capability index to attach the signal to.
[out]	signal	Signal data structure to fill.

Return values

0	Success.
<0	Error.

Examples

examples/libs/shmc/prodcons.c.

References L4_CV.

l4shmc_check_magic()

long l4shmc_check_magic ( l4shmc_chunk_t const * chunk )

inline

Check magic value of a chunk.

Parameters

chunk

Chunk.

Return values

0	Magic value is not valid.
>0	Chunk is OK, the magic value is valid.

References L4_CV.

l4shmc_get_signal()

long l4shmc_get_signal	(	l4shmc_area_t *	shmarea,
		char const *	signal_name,
		l4shmc_signal_t *	signal )

Get signal object from the shared memory area.

Parameters

	shmarea	Shared memory area.
	signal_name	Name of the signal.
[out]	signal	Signal data structure to fill.

Return values

0	Success.
<0	Error.

References L4_CV.

l4shmc_signal_cap()

l4_cap_idx_t l4shmc_signal_cap ( l4shmc_signal_t const * signal )

inline

Get the signal capability of a signal.

Parameters

signal

Signal.

Returns

Capability of the signal object.

References L4_CV, and L4_INLINE.