sigismember.c

来自「RTEMS (Real-Time Executive for Multiproc」· C语言 代码 · 共 46 行

/*
 *  3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: sigismember.c,v 1.5.2.1 2003/09/04 18:47:11 joel Exp $
 */

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include <pthread.h>
#include <errno.h>

#include <rtems/system.h>
#include <rtems/posix/pthread.h>
#include <rtems/posix/psignal.h>
#include <rtems/seterr.h>

int sigismember(
  const sigset_t   *set,
  int               signo
)
{
  if ( !set )
    rtems_set_errno_and_return_minus_one( EINVAL );

  if ( !signo )
    return 0;

  if ( !is_valid_signo(signo) )
    rtems_set_errno_and_return_minus_one( EINVAL );

  if ( *set & signo_to_mask(signo) )
    return 1;

  return 0;
}