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// 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 <pthread.h>
#include <stdio.h>
#include <errno.h>
// Toggle to use two different methods for updating shared data (C++03 volatile
// vs explicit atomic ops). Note that using a volatile variable explicitly
// depends on x86 strong memory model semantics.
//#define USE_C_VOLATILE
#ifdef USE_C_VOLATILE
volatile
#else
_Atomic
#endif
int sharedVar = 0;
static void *thread_start(void *arg) { // thread: just flip the shared flag and quit.
sharedVar = 1;
pthread_exit(0);
}
int main() {
pthread_t thr;
int rc = pthread_create(&thr, NULL, thread_start, (void*)0);
if (rc != 0) {
return 1;
}
while(sharedVar == 0) {}
assert(sharedVar == 1);
return 0;
}
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