// Copyright 2015 The Emscripten Authors. All rights reserved.

// Emscripten is available under two separate licenses, the MIT license and the

// University of Illinois/NCSA Open Source License. Both these licenses can be

// found in the LICENSE file.

#include <assert.h>

#include <stdio.h>

#include <pthread.h>

#include <emscripten.h>

#include <emscripten/threading.h>

_Atomic int numInitialized = 0;

void once_init()

{

numInitialized++;

}

#define NUM_THREADS 8

void *thread_main(void *arg)

{

static pthread_once_t control = PTHREAD_ONCE_INIT;

pthread_once(&control, &once_init);

assert(numInitialized == 1);

pthread_exit(0);

}

pthread_t thread[NUM_THREADS];

int main()

{

assert(numInitialized == 0);

for(int i = 0; i < NUM_THREADS; ++i) pthread_create(&thread[i], NULL, thread_main, 0);

if (emscripten_has_threading_support()) {

for(int i = 0; i < NUM_THREADS; ++i) pthread_join(thread[i], NULL);

assert(numInitialized == 1);

}

return 0;

}