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2008-07-22 Joel Sherrill <joel.sherrill@OARcorp.com>

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pr1291/cpukit
	* posix_users/mutex.t: Add ETIMEDOUT.
	* posix_users/semaphores.t: Clarify text to say absolute timeout.
This commit is contained in:
Joel Sherrill
2008-07-22 17:18:09 +00:00
parent a2cf229615
commit e5c0540d6a
3 changed files with 20 additions and 8 deletions
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6
doc/ChangeLog
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@@ -1,3 +1,9 @@
2008-07-22 Joel Sherrill <joel.sherrill@OARcorp.com>
pr1291/cpukit
* posix_users/mutex.t: Add ETIMEDOUT.
* posix_users/semaphores.t: Clarify text to say absolute timeout.
2008-07-15 Joel Sherrill <joel.sherrill@OARcorp.com>
* user/barrier.t, user/clock.t, user/dpmem.t, user/msg.t, user/part.t,

4
doc/posix_users/mutex.t
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@@ -630,6 +630,10 @@ ceiling.
@item EDEADLK
The current thread already owns the mutex.
@item ETIMEDOUT
The calling thread was unable to obtain the mutex within the specified
timeout period.
@end table
@subheading DESCRIPTION:

18
doc/posix_users/semaphores.t
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@@ -463,7 +463,7 @@ Multiprocessing is not supported in this implementation.
@example
int sem_timedwait(
sem_t *sem,
const struct timespec *timeout
const struct timespec *abstime
);
@end example
@end ifset
@@ -484,13 +484,15 @@ The @code{sem} argument does not refewr to a valid semaphore
@end table
@subheading DESCRIPTION:
This function attemtps to lock a semaphore specified by @code{sem}, and will
wait for the semaphore for an interval specified by @code{timeout}. If the
semaphore is available, then the semaphore is locked (i.e., the semaphore
value is decremented) and the function returns a value of 0. The semaphore
remains locked until released by a @code{sem_post()} call. If the semaphore
is unavailable, then the function will wait for the semaphore to become
available for the amount of time specified by @code{timeout}.
This function attemtps to lock a semaphore specified by @code{sem},
and will wait for the semaphore until the absolute time specified by
@code{abstime}. If the semaphore is available, then the semaphore is
locked (i.e., the semaphore value is decremented) and the function
returns a value of 0. The semaphore remains locked until released by
a @code{sem_post()} call. If the semaphore is unavailable, then the
function will wait for the semaphore to become available for the amount
of time specified by @code{timeout}.
If the semaphore does not become available within the interval specified by
@code{timeout}, then the function returns -1 and sets @code{errno} to EAGAIN.