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// |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) 2017 Mozilla Corporation. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.notify
description: >
Test that Atomics.notify notifies all waiters on a location, but does not
notify waiters on other locations.
includes: [atomicsHelper.js]
features: [Atomics, SharedArrayBuffer, TypedArray]
---*/
const WAIT_INDEX = 0; // Waiters on this will be woken
const WAIT_FAKE = 1; // Waiters on this will not be woken
const RUNNING = 2; // Accounting of live agents
const NOTIFY_INDEX = 3; // Accounting for too early timeouts
const NUMAGENT = 3;
const TIMEOUT_AGENT_MESSAGES = 2; // Number of messages for the timeout agent
const BUFFER_SIZE = 4;
// Long timeout to ensure the agent doesn't timeout before the main agent calls
// `Atomics.notify`.
const TIMEOUT = $262.agent.timeouts.long;
for (var i = 0; i < NUMAGENT; i++) {
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i32a = new Int32Array(sab);
Atomics.add(i32a, ${RUNNING}, 1);
$262.agent.report("A " + Atomics.wait(i32a, ${WAIT_INDEX}, 0));
$262.agent.leaving();
});
`);
}
$262.agent.start(`
$262.agent.receiveBroadcast(function(sab) {
const i32a = new Int32Array(sab);
Atomics.add(i32a, ${RUNNING}, 1);
// This will always time out.
$262.agent.report("B " + Atomics.wait(i32a, ${WAIT_FAKE}, 0, ${TIMEOUT}));
// If this value is not 1, then the agent timeout before the main agent
// called Atomics.notify.
const result = Atomics.load(i32a, ${NOTIFY_INDEX}) === 1
? "timeout after Atomics.notify"
: "timeout before Atomics.notify";
$262.agent.report("W " + result);
$262.agent.leaving();
});
`);
const i32a = new Int32Array(
new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * BUFFER_SIZE)
);
$262.agent.safeBroadcast(i32a);
// Wait for agents to be running.
$262.agent.waitUntil(i32a, RUNNING, NUMAGENT + 1);
// Try to yield control to ensure the agent actually started to wait. If we
// don't, we risk sending the notification before agents are sleeping, and we hang.
$262.agent.tryYield();
// Notify all waiting on WAIT_INDEX, should be 3 always, they won't time out.
assert.sameValue(
Atomics.notify(i32a, WAIT_INDEX),
NUMAGENT,
'Atomics.notify(i32a, WAIT_INDEX) returns the value of `NUMAGENT`'
);
Atomics.store(i32a, NOTIFY_INDEX, 1);
const reports = [];
for (var i = 0; i < NUMAGENT + TIMEOUT_AGENT_MESSAGES; i++) {
reports.push($262.agent.getReport());
}
reports.sort();
for (var i = 0; i < NUMAGENT; i++) {
assert.sameValue(reports[i], "A ok", 'The value of reports[i] is "A ok"');
}
assert.sameValue(reports[NUMAGENT], "B timed-out", 'The value of reports[NUMAGENT] is "B timed-out"');
assert.sameValue(reports[NUMAGENT + 1], "W timeout after Atomics.notify",
'The value of reports[NUMAGENT + 1] is "W timeout after Atomics.notify"');
reportCompare(0, 0);