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// Copyright 2019 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>
#include <vector>
pthread_t threads[50];
static void *thread_start(void *arg)
{
// This thread quits immediately...
pthread_exit((void*)0);
}
void CreateThread(int idx) {
int rc = pthread_create(&threads[idx], NULL, thread_start, (void*)idx);
assert(rc == 0);
}
void JoinThread(int idx) {
int rc = pthread_join(threads[idx], nullptr);
assert(rc == 0);
}
int main()
{
// This test should be run with a prewarmed pool of size 50. They should be fully allocated.
assert(EM_ASM_INT(return PThread.unusedWorkers.length) == 50);
double total = 0;
for (int i = 0; i < 10; ++i) {
double t1 = emscripten_get_now();
for (int j = 0; j < 50; ++j) {
CreateThread(j);
}
double t2 = emscripten_get_now();
printf("Took %f ms to allocate 50 threads.\n", t2 - t1);
total += (t2 - t1);
// Join all the threads to clear the queue..
for (int j = 0; j < 50; ++j) {
JoinThread(j);
}
}
printf("Final average %f ms.\n", total / 10.0);
return 0;
}
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