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90 lines
3.0 KiB
JavaScript
90 lines
3.0 KiB
JavaScript
// Copyright (C) 2017 Mozilla Corporation. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-atomics.notify
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description: >
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Test that Atomics.notify notifies all waiters on a location, but does not
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notify waiters on other locations.
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includes: [atomicsHelper.js]
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features: [Atomics, BigInt, SharedArrayBuffer, TypedArray]
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---*/
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const WAIT_INDEX = 0; // Waiters on this will be woken
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const WAIT_FAKE = 1; // Waiters on this will not be woken
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const RUNNING = 2; // Accounting of live agents
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const NOTIFY_INDEX = 3; // Accounting for too early timeouts
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const NUMAGENT = 3;
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const TIMEOUT_AGENT_MESSAGES = 2; // Number of messages for the timeout agent
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const BUFFER_SIZE = 4;
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// Long timeout to ensure the agent doesn't timeout before the main agent calls
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// `Atomics.notify`.
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const TIMEOUT = $262.agent.timeouts.long;
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const i64a = new BigInt64Array(
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new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * BUFFER_SIZE)
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);
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for (var i = 0; i < NUMAGENT; i++) {
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab) {
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const i64a = new BigInt64Array(sab);
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Atomics.add(i64a, ${RUNNING}, 1n);
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$262.agent.report("A " + Atomics.wait(i64a, ${WAIT_INDEX}, 0n));
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$262.agent.leaving();
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});
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`);
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}
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$262.agent.start(`
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$262.agent.receiveBroadcast(function(sab) {
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const i64a = new BigInt64Array(sab);
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Atomics.add(i64a, ${RUNNING}, 1n);
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// This will always time out.
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$262.agent.report("B " + Atomics.wait(i64a, ${WAIT_FAKE}, 0n, ${TIMEOUT}));
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// If this value is not 1n, then the agent timeout before the main agent
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// called Atomics.notify.
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const result = Atomics.load(i64a, ${NOTIFY_INDEX}) === 1n
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? "timeout after Atomics.notify"
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: "timeout before Atomics.notify";
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$262.agent.report("W " + result);
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$262.agent.leaving();
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});
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`);
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$262.agent.safeBroadcast(i64a);
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// Wait for agents to be running.
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$262.agent.waitUntil(i64a, RUNNING, BigInt(NUMAGENT + 1));
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// Try to yield control to ensure the agent actually started to wait. If we
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// don't, we risk sending the notification before agents are sleeping, and we hang.
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$262.agent.tryYield();
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// Notify all waiting on WAIT_INDEX, should be 3 always, they won't time out.
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assert.sameValue(
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Atomics.notify(i64a, WAIT_INDEX),
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NUMAGENT,
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'Atomics.notify(i64a, WAIT_INDEX) returns the value of `NUMAGENT`'
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);
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Atomics.store(i64a, NOTIFY_INDEX, 1n);
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const reports = [];
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for (var i = 0; i < NUMAGENT + TIMEOUT_AGENT_MESSAGES; i++) {
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reports.push($262.agent.getReport());
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}
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reports.sort();
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for (var i = 0; i < NUMAGENT; i++) {
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assert.sameValue(reports[i], 'A ok', 'The value of reports[i] is "A ok"');
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}
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assert.sameValue(reports[NUMAGENT], 'B timed-out', 'The value of reports[NUMAGENT] is "B timed-out"');
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assert.sameValue(reports[NUMAGENT + 1], "W timeout after Atomics.notify",
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'The value of reports[NUMAGENT + 1] is "W timeout after Atomics.notify"');
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