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/*
* Copyright (c) 2018 Samsung Electronics Co., Ltd 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.
*/
#include "common.h"
#include <stdlib.h>
#include <stdbool.h>
#include <time.h>
#include <sys/time.h>
#include <pthread.h>
static pthread_mutex_t aw_mutex;
static pthread_cond_t aw_cond;
static unsigned int thread_timeout;
static bool thread_watchdog_running;
static void *aw_thread_main(void * data)
{
int ret;
struct timespec ts;
while (1) {
pthread_mutex_lock(&aw_mutex);
memset(&ts, 0, sizeof(ts));
clock_gettime(CLOCK_MONOTONIC, &ts);
_D("current time %lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec);
ts.tv_sec += thread_timeout;
_D("wait time %lld.%.9ld", (long long)ts.tv_sec, ts.tv_nsec);
ret = pthread_cond_timedwait(&aw_cond, &aw_mutex, &ts);
_D("wakeup : %d", ret);
if (ret == ETIMEDOUT && thread_watchdog_running) {
aw_notify_watchdog();
break;
}
pthread_mutex_unlock(&aw_mutex);
}
return NULL;
}
int aw_register_thread(unsigned int timeout)
{
int ret = 0;
pthread_t pth = 0;
pthread_condattr_t cattr;
if (timeout == 0)
return -EINVAL;
pthread_mutex_init(&aw_mutex, NULL);
pthread_condattr_init(&cattr);
pthread_condattr_setclock(&cattr, CLOCK_MONOTONIC);
pthread_cond_init(&aw_cond, &cattr);
thread_timeout = timeout;
thread_watchdog_running = true;
_D("create watchdog thread with %d", thread_timeout);
ret = pthread_create(&pth, NULL, &aw_thread_main, (void *)NULL);
if (ret)
return ret;
pthread_detach(pth);
return ret;
}
int aw_control_thread(aw_op_e op, void *data)
{
int ret = 0;
unsigned int* timeout;
pthread_mutex_lock(&aw_mutex);
switch(op){
case AW_OP_DISABLE:
thread_watchdog_running = false;
break;
case AW_OP_ENABLE:
thread_watchdog_running = true;
break;
case AW_OP_CHANGE_TIMEOUT:
timeout = (unsigned int*)(data);
if(timeout == NULL){
ret = -1;
break;
}
thread_timeout = *timeout;
break;
default:
ret = -1;
break;
}
pthread_mutex_unlock(&aw_mutex);
return ret;
}
int aw_notify_thread(void)
{
int ret;
ret = pthread_mutex_trylock(&aw_mutex);
if (ret == 0) {
_D("send notify");
pthread_cond_signal(&aw_cond);
pthread_mutex_unlock(&aw_mutex);
}
return ret;
}
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