1 // Copyright 2017 The Fuchsia Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <zircon/syscalls.h>
6
7 #include <stdio.h>
8
9 #include <lib/async-loop/cpp/loop.h>
10 #include <lib/async/cpp/task.h>
11 #include <lib/async/cpp/time.h>
12 #include <trace-provider/provider.h>
13 #include <trace/event.h>
14
main(int argc,char ** argv)15 int main(int argc, char** argv) {
16 async::Loop loop(&kAsyncLoopConfigNoAttachToThread);
17 trace::TraceProvider provider(loop.dispatcher());
18
19 puts("Doing work for 30 seconds...");
20
21 zx::time start_time = async::Now(loop.dispatcher());
22 zx::time quit_time = start_time + zx::sec(30);
23
24 int iteration = 0;
25 async::TaskClosure task([&loop, &task, &iteration, quit_time] {
26 TRACE_DURATION("example", "Doing Work!", "iteration", ++iteration);
27
28 // Simulate some kind of workload.
29 puts("Doing work!");
30 zx::nanosleep(zx::deadline_after(zx::msec(500)));
31
32 // Stop if quitting.
33 zx::time now = async::Now(loop.dispatcher());
34 if (now > quit_time) {
35 loop.Quit();
36 return;
37 }
38
39 // Schedule more work in a little bit.
40 task.PostForTime(loop.dispatcher(), now + zx::msec(200));
41 });
42 task.PostForTime(loop.dispatcher(), start_time);
43
44 loop.Run();
45
46 puts("Finished.");
47 return 0;
48 }
49