73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
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/****************************************************************************
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* libs/libc/signal/sig_isemptyset.c
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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 <stdbool.h>
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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: sigisemptyset
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*
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* Description:
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* This function returns 1 if set contains no signals, and 0 otherwise.
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*
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* This is a non-standard function that may be provided by glibc if
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* _GNU_SOURCE is defined.
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*
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* Input Parameters:
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* set - Signal set to test
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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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* It follows the NuttX internal error return policy: Zero (OK) is
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* returned on success. A negated errno value is returned on failure.
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*
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* true - The set is empty.
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*
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* Assumptions:
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*
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****************************************************************************/
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int sigisemptyset(FAR sigset_t *set)
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{
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int ndx;
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/* Add the signal to the set */
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for (ndx = 0; ndx < _SIGSET_NELEM; ndx++)
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{
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if (set->_elem[ndx] != _NO_SIGNALS)
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{
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return 0;
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}
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}
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return 1;
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}
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