SDL_SemPost(3) SDL API Reference SDL_SemPost(3)NAME
SDL_SemPost - Unlock a semaphore.
SYNOPSIS
#include "SDL.h" #include "SDL_thread.h"
int SDL_SemPost(SDL_sem *sem);
DESCRIPTION
SDL_SemPost unlocks the semaphore pointed to by sem and atomically increments the semaphores value. Threads that were blocking on the sema-
phore may be scheduled after this call succeeds.
SDL_SemPost should be called after a semaphore is locked by a successful call to SDL_SemWait, SDL_SemTryWait or SDL_SemWaitTimeout.
RETURN VALUE
Returns 0 if successful or -1 if there was an error (leaving the semaphore unchanged).
EXAMPLES
SDL_SemPost(my_sem);
SEE ALSO
SDL_CreateSemaphore, SDL_DestroySemaphore, SDL_SemWait, SDL_SemTryWait, SDL_SemWaitTimeout, SDL_SemValue
SDL Tue 11 Sep 2001, 23:00 SDL_SemPost(3)
Check Out this Related Man Page
SDL_SemTryWait(3) SDL API Reference SDL_SemTryWait(3)NAME
SDL_SemTryWait - Attempt to lock a semaphore but don't suspend the thread.
SYNOPSIS
#include "SDL.h" #include "SDL_thread.h"
int SDL_SemTryWait(SDL_sem *sem);
DESCRIPTION
SDL_SemTryWait is a non-blocking varient of SDL_SemWait. If the value of the semaphore pointed to by sem is positive it will atomically
decrement the semaphore value and return 0, otherwise it will return SDL_MUTEX_TIMEOUT instead of suspending the thread.
After SDL_SemTryWait is successful, the semaphore can be released and its count atomically incremented by a successful call to SDL_SemPost.
RETURN VALUE
Returns 0 if the semaphore was successfully locked or either SDL_MUTEX_TIMEOUT or -1 if the thread would have suspended or there was an
error, respectivly.
If the semaphore was not successfully locked, the semaphore will be unchanged.
EXAMPLES
res = SDL_SemTryWait(my_sem);
if (res == SDL_MUTEX_TIMEOUT) {
return TRY_AGAIN;
}
if (res == -1) {
return WAIT_ERROR;
}
...
SDL_SemPost(my_sem);
SEE ALSO
SDL_CreateSemaphore, SDL_DestroySemaphore, SDL_SemWait, SDL_SemWaitTimeout, SDL_SemPost, SDL_SemValue
SDL Tue 11 Sep 2001, 23:00 SDL_SemTryWait(3)
I have this code that doesnt do what it is suppose to do. It should block signal that I send while process is running. I press control+z while this process is running and it should be blocked but it isnt. When i press control+z it gives me this....
+ Stopped
When I change SIGTSP into SIGINT then... (5 Replies)
First question is how do you learn UNIX on a home lab. I understand that HP-UX isn't free and neither is SCO Unix and they don't run on x86 based systems anyways. The choices I believe are going to be OpenSolaris and FreeBSD. My question is UNIX commands the same across the board so if I learn... (11 Replies)
Hello all,
I am a newbie in shell scripting.
I want to know what does the below text means?
6.355u 1.679s 0:12.68 63.2% 0+0k 0+0io 0pf+0w
I am getting this line (on terminal) after every successful execution of my script.
Thanks in advance . . :)
-MD (15 Replies)
Hi all,
I hope you are fine,
I'd like study Os I tried a book like Silberschatz it's a good book but like
other books it talks about the concepts abstractly and that's due to it try
to encompass many concepts from many operating systems in GENERAL.
i am not too much comfortable from these... (20 Replies)
Hi,
Some of the process in th environment are producing a core file.
These core files are produced by default in the directory from which they were launched.
I want to change the default directory to say /tmp of that environment.
I am using both Linux and Solaris, so will need the solution... (2 Replies)
my request is:
i have to create a script , which will grep the 'not running' jobs and will send the update in mail with its name(job)
Scenario:
logged in to machine abc
went to particular path: cd /a/b/c
then ./script1.sh status (script.sh is a script,whose status gives info about 10 jobs... (1 Reply)
Hi all,
My home server was Solaris for quite a while- I started with an Ultra 2 about 20 years ago, ended with a Blade 2000- but I've transitioned to Linux and am not going back. I miss the Solaris experience a bit (but not the Oracle experience), besides running with modern and small and quiet... (0 Replies)
can anyone spot a problem with the below:
$
$ cat getopts.sh
#!/bin/sh
usage() { echo "myscript.sh local /tmp data.txt 600s -query" 1>&2; exit 1; }
while... (4 Replies)
All
I see cpu and memory usage are under control, only cache gets high upto 99% using sar -r command
I did echo3 and cleaned the drop caches
do we need to monitor this , why my application going high upto 99.8% memused in sar command , this is cache memory which is going high
will this... (12 Replies)
I have been trying to enable password complexity variables on Solaris 10 by editing the /etc/default/passwd file but none of my changes are taking effect (I'm still able to set passwords that violate the rules I am trying to implement).
I've tried an O/S reboot after the changes but that had no... (6 Replies)
Hello everyone, I am using centos,
1) solaris is free right?
2) I want to learn solaris and install it in a computer that I am mounting, I would like know what is strong in solaris and if do it is wise. I am programmer python, learning machine and programming in general,..any help thanks,.. (6 Replies)
Hello!
Yesterday we added over 10,000 PHP man pages to our man page section.
I've not yet got our unique and special recursive search feature working; but you can still access the PHP man pages directly by selecting PHP in the man sets drop down menu (left side) and then section 3 (right... (3 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)