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https://github.com/RIOT-OS/RIOT.git
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426170b064
As discussed in #2725, this commit renames a number of stacksize constants to better convey their intended usage. In addition, constants for thread priority are given a `THREAD_` prefix. Changes are: * KERNEL_CONF_STACKSIZE_PRINTF renamed to THREAD_EXTRA_STACKSIZE_PRINTF * KERNEL_CONF_STACKSIZE_DEFAULT renamed to THREAD_STACKSIZE_DEFAULT * KERNEL_CONF_STACKSIZE_IDLE renamed to THREAD_STACKSIZE_IDLE * KERNEL_CONF_STACKSIZE_MAIN renamed to THREAD_STACKSIZE_MAIN * Move thread stacksizes from kernel.h to thread.h, since the prefix changed * PRIORITY_MIN renamed to THREAD_PRIORITY_MIN * PRIORITY_IDLE renamed to THREAD_PRIORITY_IDLE * PRIORITY_MAIN renamed to THREAD_PRIORITY_MAIN * Move thread priorities from kernel.h to thread.h since the prefix has changed * MINIMUM_STACK_SIZE renamed to THREAD_STACKSIZE_MINIMUM for consistency
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/*
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* Copyright (C) 2014 Hamburg University of Applied Sciences (HAW)
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup tests
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* @{
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*
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* @file
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* @brief simple condition variable test application
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*
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* @author Martin Landsmann <martin.landsmann@haw-hamburg.de>
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*
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* @}
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*/
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#include <stdio.h>
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#include "pthread.h"
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#include "thread.h"
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static mutex_t mutex = MUTEX_INIT;
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static struct pthread_cond_t cv;
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static volatile int is_finished;
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static volatile long count;
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static volatile long expected_value;
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static char stack[THREAD_STACKSIZE_MAIN];
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/**
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* @brief This thread tries to lock the mutex to enter the critical section.
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* Then it signals one waiting thread to check the condition and it goes to sleep again
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* If is_finished is set to 1 second_thread ends
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*/
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static void *second_thread(void *arg)
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{
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(void) arg;
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while (1) {
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mutex_lock(&mutex);
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if (is_finished == 1) {
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break;
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}
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pthread_cond_signal(&cv);
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mutex_unlock_and_sleep(&mutex);
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}
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return NULL;
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}
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int main(void)
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{
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count = 0;
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is_finished = 0;
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expected_value = 1000*1000;
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pthread_cond_init(&cv, NULL);
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kernel_pid_t pid = thread_create(stack,sizeof(stack), THREAD_PRIORITY_MAIN - 1,
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CREATE_WOUT_YIELD | CREATE_STACKTEST,
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second_thread, NULL, "second_thread");
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while (1) {
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mutex_lock(&mutex);
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thread_wakeup(pid);
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count++;
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if ((count % 100000) == 0) {
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printf("Still alive alternated [count: %ldk] times.\n", count / 1000);
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}
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if (count == expected_value) {
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puts("condition fulfilled.");
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is_finished = 1;
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mutex_unlock(&mutex);
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return 0;
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}
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pthread_cond_wait(&cv, &mutex);
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mutex_unlock(&mutex);
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}
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}
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