8935ac4cc3
Gregory Nutt has submitted the SGA and we can mograte the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/****************************************************************************
|
|
* sched/signal/sig_pause.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/signal.h>
|
|
#include <nuttx/cancelpt.h>
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: pause
|
|
*
|
|
* Description:
|
|
* The pause() function will suspend the calling thread until delivery of a
|
|
* non-blocked signal.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* Since pause() suspends thread execution indefinitely unless interrupted
|
|
* a signal, there is no successful completion return value. A value of -1
|
|
* will always be returned and errno set to indicate the error (EINTR).
|
|
*
|
|
* POSIX compatibility:
|
|
* In the POSIX description of this function is the pause() function will
|
|
* suspend the calling thread until delivery of a signal whose action is
|
|
* either to execute a signal-catching function or to terminate the
|
|
* process. This implementation only waits for any non-blocked signal
|
|
* to be received.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int pause(void)
|
|
{
|
|
sigset_t set;
|
|
int ret;
|
|
|
|
/* pause() is a cancellation point */
|
|
|
|
enter_cancellation_point();
|
|
|
|
/* Set up for the sleep. Using the empty set means that we are not
|
|
* waiting for any particular signal. However, any unmasked signal
|
|
* can still awaken sigtimedwait().
|
|
*/
|
|
|
|
sigemptyset(&set);
|
|
|
|
/* sigtwaitinfo() cannot succeed. It should always return error EINTR
|
|
* meaning that some unblocked signal was caught.
|
|
*/
|
|
|
|
ret = nxsig_waitinfo(&set, NULL);
|
|
if (ret < 0)
|
|
{
|
|
set_errno(-ret);
|
|
ret = ERROR;
|
|
}
|
|
|
|
leave_cancellation_point();
|
|
return ret;
|
|
}
|