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.
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/****************************************************************************
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* sched/signal/sig_cleanup.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 <nuttx/config.h>
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#include <nuttx/arch.h>
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#include "signal/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_cleanup
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*
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* Description:
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* Deallocate all signal-related lists in a TCB. This function is
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* called only at task deletion time. The caller is expected to have
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* assured the critical section necessary to perform this action.
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*
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****************************************************************************/
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void nxsig_cleanup(FAR struct tcb_s *stcb)
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{
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FAR sigq_t *sigq;
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/* Deallocate all entries in the list of pending signal actions */
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while ((sigq = (FAR sigq_t *)sq_remfirst(&stcb->sigpendactionq)) != NULL)
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{
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nxsig_release_pendingsigaction(sigq);
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}
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/* Deallocate all entries in the list of posted signal actions */
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while ((sigq = (FAR sigq_t *)sq_remfirst(&stcb->sigpostedq)) != NULL)
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{
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nxsig_release_pendingsigaction(sigq);
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}
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/* Misc. signal-related clean-up */
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sigfillset(&stcb->sigprocmask);
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sigemptyset(&stcb->sigwaitmask);
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}
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/****************************************************************************
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* Name: nxsig_release
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*
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* Description:
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* Deallocate all signal-related lists in a group. This function is
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* called only when the last thread leaves the group. The caller is
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* expected to have assured the critical section necessary to perform
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* this action.
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*
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****************************************************************************/
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void nxsig_release(FAR struct task_group_s *group)
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{
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FAR sigactq_t *sigact;
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FAR sigpendq_t *sigpend;
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/* Deallocate all entries in the list of signal actions */
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while ((sigact = (FAR sigactq_t *)sq_remfirst(&group->tg_sigactionq))
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!= NULL)
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{
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nxsig_release_action(sigact);
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}
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/* Deallocate all entries in the list of pending signals */
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while ((sigpend = (FAR sigpendq_t *)sq_remfirst(&group->tg_sigpendingq))
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!= NULL)
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{
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nxsig_release_pendingsignal(sigpend);
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}
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}
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