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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 <pthread.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
pthread_cond_t started_cond = PTHREAD_COND_INITIALIZER;
pthread_mutex_t started_lock = PTHREAD_MUTEX_INITIALIZER;
_Atomic int got_term_signal = 0;
pthread_t thr;
void signal_handler(int sig, siginfo_t * info, void * arg) {
printf("signal: %d onthread=%d\n", sig, pthread_self() == thr);
if (sig == SIGTERM) {
got_term_signal = 1;
}
}
void setup_handler() {
struct sigaction act;
sigemptyset(&act.sa_mask);
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = signal_handler;
sigaction(SIGTERM, &act, NULL);
}
void sleepms(long msecs) {
usleep(msecs * 1000);
}
void *thread_start(void *arg) {
pthread_mutex_lock(&started_lock);
pthread_cond_signal(&started_cond);
pthread_mutex_unlock(&started_lock);
// As long as this thread is running, keep the shared variable latched to nonzero value.
while (!got_term_signal) {
sleepms(1);
}
printf("got term signal, shutting down thread\n");
pthread_exit(0);
}
int main() {
setup_handler();
int s = pthread_create(&thr, NULL, thread_start, 0);
assert(s == 0);
// Wait until thread kicks in and sets the shared variable.
pthread_mutex_lock(&started_lock);
pthread_cond_wait(&started_cond, &started_lock);
pthread_mutex_unlock(&started_lock);
printf("thread has started, sending SIGTERM\n");
s = pthread_kill(thr, SIGTERM);
printf("SIGTERM sent\n");
assert(s == 0);
pthread_join(thr, NULL);
return 0;
}
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