text: /****************************************************************************
   *
   * Copyright 2016 Samsung Electronics All Rights Reserved.
   *
   * Licensed 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.
   *
   ****************************************************************************/
  /****************************************************************************
   * kernel/signal/sig_pending.c
   *
   *   Copyright (C) 2007-2009, 2013 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 <tinyara/config.h>
  
  #include <signal.h>
  #include <sched.h>
  
  #include "sched/sched.h"
  #include "signal/signal.h"
  
  /****************************************************************************
   * Definitions
   ****************************************************************************/
  
  /****************************************************************************
   * Private Type Declarations
   ****************************************************************************/
  
  /****************************************************************************
   * Global Variables
   ****************************************************************************/
  
  /****************************************************************************
   * Private Variables
   ****************************************************************************/
  
  /****************************************************************************
   * Private Function Prototypes
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: sigpending
   *
   * Description:
   *   This function returns the set of signals that are blocked from deliveryi
   *   and that are pending for the calling process in the space pointed to by
   *   set.
   *
   * Parameters:
   *   set - The location to return the pending signal set.
   *
   * Return Value:
   *   0 (OK) or -1 (ERROR)
   *
   * Assumptions:
   *
   ****************************************************************************/
  
  int sigpending(FAR sigset_t *set)
  {
  	FAR struct tcb_s *rtcb = this_task();
  	int ret = ERROR;
  
  	if (set) {
  		*set = sig_pendingset(rtcb);
  		ret = OK;
  	}
  
  	return ret;
  }
  
  /****************************************************************************
   * Name: sig_pendingset
   *
   * Description:
   *   Convert the list of pending signals into a signal set
   *
   ****************************************************************************/
  
  sigset_t sig_pendingset(FAR struct tcb_s *stcb)
  {
  	FAR struct task_group_s *group = stcb->group;
  	sigset_t sigpendset;
  	FAR sigpendq_t *sigpend;
  	irqstate_t saved_state;
  
  	DEBUGASSERT(group);
  
  	sigpendset = NULL_SIGNAL_SET;
  
  	saved_state = irqsave();
  	for (sigpend = (FAR sigpendq_t *)group->sigpendingq.head; (sigpend); sigpend = sigpend->flink) {
  		sigaddset(&sigpendset, sigpend->info.si_signo);
  	}
  
  	irqrestore(saved_state);
  
  	return sigpendset;
  }
  