Consumer

Collaboration diagram for Consumer:

Functions
long	l4shmc_enable_signal (l4shmc_signal_t *signal)
	Enable a signal.
long	l4shmc_wait_any (l4shmc_signal_t **retsignal)
	Wait on any signal.
long	l4shmc_wait_any_try (l4shmc_signal_t **retsignal)
	Check whether any waited signal has an event pending.
long	l4shmc_wait_any_to (l4_timeout_t timeout, l4shmc_signal_t **retsignal)
	Wait for any signal with timeout.
long	l4shmc_wait_signal (l4shmc_signal_t *signal)
	Wait on a specific signal.
long	l4shmc_wait_signal_to (l4shmc_signal_t *signal, l4_timeout_t timeout)
	Wait on a specific signal, with timeout.
long	l4shmc_wait_signal_try (l4shmc_signal_t *signal)
	Check whether a specific signal has an event pending.

Detailed Description

Function Documentation

l4shmc_enable_signal()

long l4shmc_enable_signal

(

l4shmc_signal_t *

signal

)

Enable a signal.

Parameters

signal

Signal to enable.

Return values

0	Success.
<0	Error.

A signal must be enabled before waiting when the consumer waits on any signal. Enabling is not needed if the consumer waits for a specific signal or chunk.

References L4_CV.

l4shmc_wait_any()

long l4shmc_wait_any ( l4shmc_signal_t ** retsignal )

inline

Wait on any signal.

Parameters

[out]

retsignal

Signal received.

Return values

0	Success.
<0	Error.

References L4_CV, and L4_INLINE.

l4shmc_wait_any_to()

long l4shmc_wait_any_to	(	l4_timeout_t	timeout,
		l4shmc_signal_t **	retsignal )

Wait for any signal with timeout.

Parameters

	timeout	Timeout.
[out]	retsignal	Signal that has the event pending if any.

Return values

0	Success.
<0	Error.

The return code indicates whether an event was pending or not. Success means an event was pending, if an receive timeout error is returned no event was pending.

References L4_CV, and L4_INLINE.

l4shmc_wait_any_try()

long l4shmc_wait_any_try ( l4shmc_signal_t ** retsignal )

inline

Check whether any waited signal has an event pending.

Parameters

[out]

retsignal

Signal that has the event pending if any.

Return values

0	Success.
<0	Error.

The return code indicates whether an event was pending or not. Success means an event was pending, if an receive timeout error is returned no event was pending.

References L4_CV.

l4shmc_wait_signal()

long l4shmc_wait_signal ( l4shmc_signal_t * signal )

inline

Wait on a specific signal.

Parameters

signal

Signal to wait for.

Return values

0	Success.
<0	Error.

Examples

examples/libs/shmc/prodcons.c.

References L4_CV.

l4shmc_wait_signal_to()

long l4shmc_wait_signal_to	(	l4shmc_signal_t *	signal,
		l4_timeout_t	timeout )

Wait on a specific signal, with timeout.

Parameters

signal	Signal to wait for.
timeout	Timeout.

Return values

0	Success.
<0	Error.

References L4_CV, and L4_INLINE.

l4shmc_wait_signal_try()

long l4shmc_wait_signal_try ( l4shmc_signal_t * signal )

inline

Check whether a specific signal has an event pending.

Parameters

signal

Signal to check.

Return values

0	Success.
<0	Error.

The return code indicates whether an event was pending or not. Success means an event was pending, if an receive timeout error is returned no event was pending.

References L4_CV, and L4_INLINE.