4 More Discussions You Might Find Interesting
1. Linux
Dear All
Can you please let me know what is the Linux distribution name for kernel 2.6.20?
Thank you in advance (4 Replies)
Discussion started by: hadimotamedi
4 Replies
2. Linux
Hi All !
Is linux kernel preemptive or non-preemptive?
My understanding is preemptive kernel. is it correct?
Thanks & Regards
Venkat Gopu (4 Replies)
Discussion started by: venkatgopu
4 Replies
3. Programming
Hi friends I'm doing a project and in that I need to use kernel semaphore but I'm not very clear about how to use it. I've used system V semaphore.
What I find difficult to understand is that in system V semaphore, a semaphore set is registered to the system (the semid returned from semget call... (3 Replies)
Discussion started by: Rakesh Ranjan
3 Replies
4. UNIX for Dummies Questions & Answers
I'm looking to download the oldest version of the linux kernel that I can, just to look at it. Does anyone know where I can get it (or a slightyly later version) from? Any help on this quest would be great, thanks.
Paul (3 Replies)
Discussion started by: KrazyGuyPaul
3 Replies
LEARN ABOUT CENTOS
sem_post
SEM_POST(3) Linux Programmer's Manual SEM_POST(3)
NAME
sem_post - unlock a semaphore
SYNOPSIS
#include <semaphore.h>
int sem_post(sem_t *sem);
Link with -pthread.
DESCRIPTION
sem_post() increments (unlocks) the semaphore pointed to by sem. If the semaphore's value consequently becomes greater than zero, then
another process or thread blocked in a sem_wait(3) call will be woken up and proceed to lock the semaphore.
RETURN VALUE
sem_post() returns 0 on success; on error, the value of the semaphore is left unchanged, -1 is returned, and errno is set to indicate the
error.
ERRORS
EINVAL sem is not a valid semaphore.
EOVERFLOW
The maximum allowable value for a semaphore would be exceeded.
CONFORMING TO
POSIX.1-2001.
NOTES
sem_post() is async-signal-safe: it may be safely called within a signal handler.
EXAMPLE
See sem_wait(3).
SEE ALSO
sem_getvalue(3), sem_wait(3), sem_overview(7)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2012-05-13 SEM_POST(3)