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/*
* Copyright (C) 2014 Freie Universität Berlin
*
* 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 pthread_barrier test
*
* @author René Kijewski <rene.kijewski@fu-berlin.de>
*
* @}
*/
#include <stdio.h>
#include <inttypes.h>
#include "pthread.h"
#include "random.h"
#include "xtimer.h"
#define NUM_CHILDREN 4
#define NUM_ITERATIONS 5
#define RAND_SEED 0xC0FFEE
static pthread_barrier_t barrier;
static void *run(void *id_)
{
int id = (intptr_t) id_ + 1;
printf("Start %i\n", id);
for (int i = 1; i <= NUM_ITERATIONS; ++i) {
if (id == NUM_CHILDREN) {
puts("\n======================================\n");
}
pthread_barrier_wait(&barrier);
uint32_t timeout_us = random_uint32() % 2500000;
printf("Child %i sleeps for %8" PRIu32 " µs.\n", id, timeout_us);
xtimer_usleep(timeout_us);
}
printf("Done %i\n", id);
return NULL;
}
int main(void)
{
random_init(RAND_SEED);
puts("Start.\n");
pthread_barrier_init(&barrier, NULL, NUM_CHILDREN);
pthread_t children[NUM_CHILDREN];
for (int i = 0; i < NUM_CHILDREN; ++i) {
pthread_create(&children[i], NULL, run, (void *) (intptr_t) i);
}
for (int i = 0; i < NUM_CHILDREN; ++i) {
void *void_;
pthread_join(children[i], &void_);
}
pthread_barrier_destroy(&barrier);
puts("\nDone.");
return 0;
}