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-rw-r--r--nuttx/sched/sig_deliver.c159
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diff --git a/nuttx/sched/sig_deliver.c b/nuttx/sched/sig_deliver.c
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-/****************************************************************************
- * sched/sig_deliver.c
- *
- * Copyright (C) 2007, 2008, 2012 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <sys/types.h>
-#include <signal.h>
-#include <unistd.h>
-#include <sched.h>
-#include <debug.h>
-#include <nuttx/arch.h>
-
-#include "os_internal.h"
-#include "sem_internal.h"
-#include "sig_internal.h"
-
-/****************************************************************************
- * Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Type Declarations
- ****************************************************************************/
-
-/****************************************************************************
- * Global Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: sig_deliver
- *
- * Description:
- * This function is called on the thread of execution of the signal
- * receiving task. It processes all queued signals then returns.
- *
- ****************************************************************************/
-
-void sig_deliver(FAR _TCB *stcb)
-{
- FAR sigq_t *sigq;
- FAR sigq_t *next;
- sigset_t savesigprocmask;
- irqstate_t saved_state;
- int saved_errno;
-
- sched_lock();
-
- /* Save the thread errno. When we finished dispatching the
- * signal actions and resume the task, the errno value must
- * be unchanged by the operation of the signal handling. In
- * particular, the EINTR indication that says that the task
- * was reawakened by a signal must be retained.
- */
-
- saved_errno = stcb->pterrno;
- for (sigq = (FAR sigq_t*)stcb->sigpendactionq.head; (sigq); sigq = next)
- {
- next = sigq->flink;
- sdbg("Sending signal sigq=0x%x\n", sigq);
-
- /* Remove the signal structure from the sigpendactionq and place it
- * in the sigpostedq. NOTE: Since signals are processed one at a
- * time, there should never be more than one signal in the sigpostedq
- */
-
- saved_state = irqsave();
- sq_rem((FAR sq_entry_t*)sigq, &(stcb->sigpendactionq));
- sq_addlast((FAR sq_entry_t*)sigq, &(stcb->sigpostedq));
- irqrestore(saved_state);
-
- /* Call the signal handler (unless the signal was cancelled)
- *
- * Save a copy of the old sigprocmask and install the new
- * (temporary) sigprocmask. The new sigprocmask is the union
- * of the current sigprocmask and the sa_mask for the signal being
- * delivered plus the signal being delivered.
- */
-
- savesigprocmask = stcb->sigprocmask;
- stcb->sigprocmask = savesigprocmask | sigq->mask | SIGNO2SET(sigq->info.si_signo);
-
- /* Deliver the signal */
-
- (*sigq->action.sighandler)(sigq->info.si_signo, &sigq->info, NULL);
-
- /* Restore the original sigprocmask */
-
- stcb->sigprocmask = savesigprocmask;
-
- /* Now, handle the (rare?) case where (a) a blocked signal was
- * received while the signal handling executed but (b) restoring the
- * original sigprocmask will unblock the signal.
- */
-
- sig_unmaskpendingsignal();
-
- /* Remove the signal from the sigpostedq */
-
- saved_state = irqsave();
- sq_rem((FAR sq_entry_t*)sigq, &(stcb->sigpostedq));
- irqrestore(saved_state);
-
- /* Then deallocate it */
-
- sig_releasependingsigaction(sigq);
- }
-
- stcb->pterrno = saved_errno;
- sched_unlock();
-}
-