USCPSEMA(3P)							  USCPSEMA(3P)

NAME    [Toc]    [Back]

     uscpsema -	conditionally acquires a semaphore

C SYNOPSIS    [Toc]    [Back]

     #include <ulocks.h>

     int uscpsema (usema_t *sema);

DESCRIPTION    [Toc]    [Back]

     uscpsema attempts to acquire the semaphore	specified by sema. If the
     semaphore is not available	(its count is less than	zero), uscpsema
     returns immediately with an indication that the semaphore is not
     available.

SEE ALSO    [Toc]    [Back]

     usinitsema(3P), usnewsema(3P), uspsema(3P), ustestsema(3P), usvsema(3P).

DIAGNOSTICS    [Toc]    [Back]

     uscpsema returns a	0 if the semaphore is not acquired and 1 if the
     semaphore is acquired.  uscpsema can only return an error (-1) if the
     internal semaphore	data structure is corrupted.


									PPPPaaaaggggeeee 1111