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// Copyright 2021 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 <pthread.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <errno.h>
#include <emscripten.h>
pthread_barrier_t barrier;
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t condvar = PTHREAD_COND_INITIALIZER;
int th_cancelled = 0;
volatile int res = 43;
static void cleanup_handler(void *arg) {
emscripten_log(EM_LOG_CONSOLE, "Called clean-up handler with arg %p", arg);
int a = (intptr_t)(arg);
res -= a;
pthread_mutex_unlock(&mutex);
pthread_barrier_wait(&barrier);
}
static void *thread_start(void *arg) {
pthread_cleanup_push(cleanup_handler, (void*)42);
emscripten_log(EM_LOG_CONSOLE, "Thread started!");
pthread_mutex_lock(&mutex);
pthread_barrier_wait(&barrier);
int ret = 0;
do {
emscripten_log(EM_LOG_CONSOLE, "Waiting on conditional variable");
ret = pthread_cond_wait(&condvar, &mutex);
} while (ret == 0 && th_cancelled == 0);
if (ret != 0) {
emscripten_log(EM_LOG_CONSOLE, "Cond wait failed ret: %d", ret);
}
res = 1000; // Shouldn't ever reach here.
pthread_cleanup_pop(0);
pthread_mutex_unlock(&mutex);
pthread_barrier_wait(&barrier);
return NULL;
}
int main() {
pthread_barrier_init(&barrier, NULL, 2);
pthread_t thr;
int s = pthread_create(&thr, NULL, thread_start, (void*)0);
assert(s == 0);
emscripten_log(EM_LOG_CONSOLE, "Thread created");
pthread_barrier_wait(&barrier);
// Lock mutex to ensure that thread is waiting
pthread_mutex_lock(&mutex);
emscripten_log(EM_LOG_CONSOLE, "Canceling thread..");
s = pthread_cancel(thr);
assert(s == 0);
th_cancelled = 1;
pthread_mutex_unlock(&mutex);
emscripten_log(EM_LOG_CONSOLE, "Main thread waitnig for side-thread");
pthread_barrier_wait(&barrier);
pthread_barrier_destroy(&barrier);
emscripten_log(EM_LOG_CONSOLE, "Test finished result: %d", res);
return res;
}
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