| // 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"'); |