110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/****************************************************************************
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* libs/libc/signal/sig_ismember.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <signal.h>
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#include <errno.h>
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#include <nuttx/signal.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxsig_ismember
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*
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* Description:
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* This function tests whether the signal specified by signo is a member
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* of the set specified by set.
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*
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* Input Parameters:
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* set - Signal set to test
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* signo - Signal to test for
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*
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* Returned Value:
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* This is an internal OS interface and should not be used by applications.
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* On success, it returns 0 if the signal is not a member, 1 if the signal
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* is a member of the set.
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* A negated errno value is returned on failure.
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*
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* EINVAL - The signo argument is invalid.
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*
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* Assumptions:
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*
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****************************************************************************/
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int nxsig_ismember(FAR const sigset_t *set, int signo)
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{
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/* Verify the signal */
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if (!GOOD_SIGNO(signo))
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{
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return -EINVAL;
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}
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else
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{
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/* Check if the signal is in the set */
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return ((set->_elem[_SIGSET_NDX(signo)] & _SIGNO2SET(signo)) != 0);
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}
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}
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/****************************************************************************
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* Name: sigismember
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*
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* Description:
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* This function tests whether the signal specified by signo is a member
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* of the set specified by set.
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*
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* Input Parameters:
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* set - Signal set to test
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* signo - Signal to test for
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*
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* Returned Value:
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* 1 (true), if the specified signal is a member of the set,
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* 0 (OK or FALSE), if it is not, or
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* -1 (ERROR) if the signal number is invalid.
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*
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* Assumptions:
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*
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****************************************************************************/
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int sigismember(FAR const sigset_t *set, int signo)
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{
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int ret;
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/* Let nxsig_ismember do all of the work */
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ret = nxsig_ismember(set, signo);
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if (ret < 0)
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{
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set_errno(EINVAL);
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ret = ERROR;
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}
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return ret;
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}
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