uscpsema man page on IRIX

uscpsema man page on IRIX

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USCPSEMA(3P)							  USCPSEMA(3P)

NAME
     uscpsema - conditionally acquires a semaphore

C SYNOPSIS
     #include <ulocks.h>

     int uscpsema (usema_t *sema);

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

DIAGNOSTICS
     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.

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