/*
* Copyright (c) 2016, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * 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.
*     * Neither the name of The Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* 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.
*/

#include <sys/prctl.h>
#include <stdio.h>
#include <stdlib.h>

#include "qmmf_camera3_thread.h"
#include "recorder/src/service/qmmf_recorder_common.h"

namespace qmmf {

namespace cameraadaptor {

Camera3Thread::Camera3Thread() : pid_(0), running_(false) {
  pthread_mutex_init(&thread_lock_, NULL);
}

Camera3Thread::~Camera3Thread() {
  RequestExitAndWait();
  pthread_mutex_destroy(&thread_lock_);
}

int32_t Camera3Thread::Run(const char *name) {
  int32_t res = 0;

  pthread_mutex_lock(&thread_lock_);
  if (running_) {
    QMMF_ERROR("%s: Thread already started!\n", __func__);
    res = -ENOSYS;
    goto exit;
  }

  running_ = true;
  res = pthread_create(&pid_, NULL, MainLoop, this);
  if (0 != res) {
    QMMF_ERROR("%s: Unable to create thread\n", __func__);
    goto exit;
  }

  if (NULL != name) {
    name_ = name;
  } else {
    name_ = "CAM-Thread";
  }

exit:
  pthread_mutex_unlock(&thread_lock_);

  return res;
}

void Camera3Thread::RequestExit() {
  pthread_mutex_lock(&thread_lock_);
  running_ = false;
  pthread_mutex_unlock(&thread_lock_);
}

void Camera3Thread::RequestExitAndWait() {
  pthread_mutex_lock(&thread_lock_);
  if (0 != pid_) {
    running_ = false;
    pthread_mutex_unlock(&thread_lock_);

    pthread_join(pid_, NULL);

    pthread_mutex_lock(&thread_lock_);
    pid_ = 0;
  }
  pthread_mutex_unlock(&thread_lock_);
}

void *Camera3Thread::MainLoop(void *userdata) {
  bool run = true;
  Camera3Thread *pme = reinterpret_cast<Camera3Thread *>(userdata);
  if (NULL == pme) {
    return NULL;
  }

  prctl(PR_SET_NAME, (unsigned long)pme->name_.string(), 0, 0, 0);
  while (run) {
    pthread_mutex_lock(&pme->thread_lock_);
    run = pme->running_;
    pthread_mutex_unlock(&pme->thread_lock_);

    run &= pme->ThreadLoop();
  }

  return NULL;
}

bool Camera3Thread::ExitPending() {
  pthread_mutex_lock(&thread_lock_);
  bool res = running_ ? false : true;
  pthread_mutex_unlock(&thread_lock_);
  return res;
}

}  // namespace cameraadaptor ends here

}  // namespace qmmf ends here