usr/src/lib/libc/vax/sys/wait3.s

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

#ifndef lint
_sccsid:.asciz  "@(#)wait3.s    5.2 (Berkeley) %G%"
#endif not lint

/*      @(#)wait3.s     5.2     (Berkeley)      %G%     */

/*
 * C library -- wait3
 *
 * pid = wait3(&status, flags, &rusage);
 *
 * pid == -1 if error
 * status indicates fate of process, if given
 * flags may indicate process is not to hang or
 * that untraced stopped children are to be reported.
 * rusage optionally returns detailed resource usage information
 */
#include "SYS.h"

#define SYS_wait3       SYS_wait

ENTRY(wait3)
        movl    8(ap),r0        /* make it easy for system to get */
        movl    12(ap),r1       /* these extra arguments */
        bispsw  $0xf            /* flags wait3() */
        chmk    $SYS_wait3
        bcc     noerror
        movl    r0,_errno
        mnegl   $1,r0
        ret
noerror:
        tstl    4(ap)           /* status desired? */
        beql    nostatus        /* no */
        movl    r1,*4(ap)       /* store child's status */
nostatus:
        ret