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#include "unity.h"
#include <pthread.h>
#include <sys/delay.h>
#define NUM_THREADS 2
static pthread_t threads[NUM_THREADS];
static pthread_once_t once = PTHREAD_ONCE_INIT;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static int execs;
static void init() {
int ret;
ret = pthread_mutex_lock(&mutex);
TEST_ASSERT(ret == 0);
execs++;
ret = pthread_mutex_unlock(&mutex);
TEST_ASSERT(ret == 0);
}
static void *thread1(void *args) {
int ret;
ret = pthread_once(&once, init);
TEST_ASSERT(ret == 0);
// Simulate some work
usleep(1000);
pthread_exit(NULL);
}
TEST_CASE("pthread once", "[pthread]") {
pthread_attr_t attr;
int i, ret;
ret = pthread_attr_init(&attr);
TEST_ASSERT(ret == 0);
ret = pthread_mutex_init(&mutex, NULL);
TEST_ASSERT(ret == 0);
ret = pthread_create(&threads[0], &attr, thread1, NULL);
TEST_ASSERT(ret == 0);
ret = pthread_create(&threads[1], &attr, thread1, NULL);
TEST_ASSERT(ret == 0);
// Wait for all threads completion
for (i=0; i< NUM_THREADS; i++) {
ret = pthread_join(threads[i], NULL);
TEST_ASSERT(ret == 0);
}
TEST_ASSERT(execs == 1);
// Clean up
ret = pthread_attr_destroy(&attr);
TEST_ASSERT(ret == 0);
ret = pthread_mutex_destroy(&mutex);
TEST_ASSERT(ret == 0);
}
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