GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  SDL_SEMWAIT (3)

NAME

SDL_SemWait - Lock a semaphore and suspend the thread if the semaphore value is zero.

CONTENTS

SYNOPSIS

#include "SDL.h" #include "SDL_thread.h"

int SDL_SemWait(SDL_sem *sem);

DESCRIPTION

SDL_SemWait() suspends the calling thread until either the semaphore pointed to by sem has a positive value, the call is interrupted by a signal or error. If the call is successful it will atomically decrement the semaphore value.

After SDL_SemWait() is successful, the semaphore can be released and its count atomically incremented by a successful call to SDL_SemPost.

RETURN VALUE

Returns 0 if successful or -1 if there was an error (leaving the semaphore unchanged).

EXAMPLES

if (SDL_SemWait(my_sem) == -1) {
        return WAIT_FAILED;
}

...

SDL_SemPost(my_sem);

SEE ALSO

SDL_CreateSemaphore, SDL_DestroySemaphore, SDL_SemTryWait, SDL_SemWaitTimeout, SDL_SemPost, SDL_SemValue

Search for    or go to Top of page |  Section 3 |  Main Index


SDL SDL_SEMWAIT (3) Tue 11 Sep 2001, 23:00

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.