// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <linux/membarrier.h>
#include <syscall.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <pthread.h>

#include "membarrier_test_impl.h"

static int thread_ready, thread_quit;
static pthread_mutex_t test_membarrier_thread_mutex =
        PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t test_membarrier_thread_cond =
        PTHREAD_COND_INITIALIZER;

void *test_membarrier_thread(void *arg)
{
        pthread_mutex_lock(&test_membarrier_thread_mutex);
        thread_ready = 1;
        pthread_cond_broadcast(&test_membarrier_thread_cond);
        pthread_mutex_unlock(&test_membarrier_thread_mutex);

        pthread_mutex_lock(&test_membarrier_thread_mutex);
        while (!thread_quit)
                pthread_cond_wait(&test_membarrier_thread_cond,
                                  &test_membarrier_thread_mutex);
        pthread_mutex_unlock(&test_membarrier_thread_mutex);

        return NULL;
}

static int test_mt_membarrier(void)
{
        int i;
        pthread_t test_thread;

        pthread_create(&test_thread, NULL,
                       test_membarrier_thread, NULL);

        pthread_mutex_lock(&test_membarrier_thread_mutex);
        while (!thread_ready)
                pthread_cond_wait(&test_membarrier_thread_cond,
                                  &test_membarrier_thread_mutex);
        pthread_mutex_unlock(&test_membarrier_thread_mutex);

        test_membarrier_fail();

        test_membarrier_success();

        pthread_mutex_lock(&test_membarrier_thread_mutex);
        thread_quit = 1;
        pthread_cond_broadcast(&test_membarrier_thread_cond);
        pthread_mutex_unlock(&test_membarrier_thread_mutex);

        pthread_join(test_thread, NULL);

        return 0;
}

int main(int argc, char **argv)
{
        ksft_print_header();
        ksft_set_plan(16);

        test_membarrier_query();

        /* Multi-threaded */
        test_mt_membarrier();

        ksft_exit_pass();
}