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/*
* Copyright (C) 2014 Hamburg University of Applied Siences (HAW)
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief simple test application for atomic mutex unlocking and sleeping
*
* @author Martin Landsmann <martin.landsmann@haw-hamburg.de>
*
* @}
*/
#include <stdio.h>
#include "thread.h"
#include "mutex.h"
static mutex_t mutex = MUTEX_INIT;
static volatile int indicator, count;
static kernel_pid_t main_pid;
static char stack[THREAD_STACKSIZE_MAIN];
static void *second_thread(void *arg)
{
(void) arg;
while (1) {
mutex_lock(&mutex);
thread_wakeup(main_pid);
indicator--;
mutex_unlock_and_sleep(&mutex);
}
return NULL;
}
int main(void)
{
indicator = 0;
count = 0;
main_pid = thread_getpid();
kernel_pid_t second_pid = thread_create(stack,
sizeof(stack),
THREAD_PRIORITY_MAIN - 1,
THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
second_thread,
NULL,
"second_thread");
while (1) {
mutex_lock(&mutex);
thread_wakeup(second_pid);
indicator++;
count++;
if (indicator > 1 || indicator < -1) {
printf("Error, threads did not sleep properly. [indicator: %d]\n", indicator);
return -1;
}
if ((count % 100000) == 0) {
printf("Still alive alternated [count: %dk] times.\n", count / 1000);
}
mutex_unlock_and_sleep(&mutex);
}
}
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