1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
// |reftest| skip-if(!this.hasOwnProperty('Atomics')||!this.hasOwnProperty('SharedArrayBuffer')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))) -- Atomics,SharedArrayBuffer is not enabled unconditionally, ARM64 Simulator cannot emulate atomics
// Copyright (C) 2018 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.wait
description: >
Waiter does not spuriously notify on index which is subject to exchange operation
includes: [atomicsHelper.js]
features: [Atomics, SharedArrayBuffer, TypedArray]
---*/
const RUNNING = 1;
const TIMEOUT = $262.agent.timeouts.small;
const i32a = new Int32Array(
new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4)
);
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i32a = new Int32Array(sab);
Atomics.add(i32a, ${RUNNING}, 1);
const before = $262.agent.monotonicNow();
const unpark = Atomics.wait(i32a, 0, 0, ${TIMEOUT});
const duration = $262.agent.monotonicNow() - before;
$262.agent.report(duration);
$262.agent.report(unpark);
$262.agent.leaving();
});
`);
$262.agent.safeBroadcast(i32a);
$262.agent.waitUntil(i32a, RUNNING, 1);
// Try to yield control to ensure the agent actually started to wait.
$262.agent.tryYield();
Atomics.exchange(i32a, 0, 1);
const lapse = $262.agent.getReport();
assert(
lapse >= TIMEOUT,
'The result of `(lapse >= TIMEOUT)` is true'
);
assert.sameValue(
$262.agent.getReport(),
'timed-out',
'$262.agent.getReport() returns "timed-out"'
);
assert.sameValue(Atomics.notify(i32a, 0), 0, 'Atomics.notify(i32a, 0) returns 0');
reportCompare(0, 0);
|
