717bb04cb7
Refer to issue #8867 for details and rational. Convert sigset_t to an array type so that more than 32 signals can be supported. Why not use a uin64_t? - Using a uin32_t is more flexible if we decide to increase the number of signals beyound 64. - 64-bit accesses are not atomic, at least not on 32-bit ARMv7-M and similar - Keeping the base type as uint32_t does not introduce additional overhead due to padding to achieve 64-bit alignment of uin64_t - Some architectures still supported by NuttX do not support uin64_t types, Increased the number of signals to 64. This matches Linux. This will support all xsignals defined by Linux and also 32 real time signals (also like Linux). This is is a work in progress; a draft PR that you are encouraged to comment on.
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/****************************************************************************
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* libs/libc/signal/sig_orset.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 <signal.h>
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#include <errno.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: sigorset
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*
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* Description:
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* This function returns the union of right and left in dest.
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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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* dest - Location to store the union
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* left, right - The two sets to use in the unioon
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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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* 0 on success and -1 on failure
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*
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* Assumptions:
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*
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****************************************************************************/
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int sigorset(FAR sigset_t *dest, FAR sigset_t *left, FAR sigset_t *right)
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{
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int ndx;
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/* Add the signal sets */
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for (ndx = 0; ndx < _SIGSET_NELEM; ndx++)
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{
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dest->_elem[ndx] = left->_elem[ndx] | right->_elem[ndx];
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}
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return OK;
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}
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