count-defaults-to-infinity-undefined.js (2399B)
1 // |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 2 // Copyright (C) 2018 Amal Hussein. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 esid: sec-atomics.notify 7 description: > 8 Undefined count arg should result in an infinite count 9 info: | 10 Atomics.notify( typedArray, index, count ) 11 12 3.If count is undefined, let c be +∞. 13 14 includes: [atomicsHelper.js] 15 features: [Atomics, SharedArrayBuffer, TypedArray] 16 ---*/ 17 18 const RUNNING = 0; // Index to notify agent has started. 19 const WAIT_INDEX = 1; // Index all agents are waiting on. 20 const BUFFER_SIZE = 2; 21 22 const NUMAGENT = 4; // Total number of agents started 23 24 for (var i = 0; i < NUMAGENT; i++) { 25 $262.agent.start(` 26 $262.agent.receiveBroadcast(function(sab) { 27 const i32a = new Int32Array(sab); 28 Atomics.add(i32a, ${RUNNING}, 1); 29 30 // Wait until restarted by main thread. 31 var status = Atomics.wait(i32a, ${WAIT_INDEX}, 0); 32 33 // Report wait status and then exit the agent. 34 var name = String.fromCharCode(0x41 + ${i}); // "A", "B", "C", or "D" 35 $262.agent.report(name + " " + status); 36 $262.agent.leaving(); 37 }); 38 `); 39 } 40 41 const i32a = new Int32Array( 42 new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * BUFFER_SIZE) 43 ); 44 45 $262.agent.safeBroadcast(i32a); 46 $262.agent.waitUntil(i32a, RUNNING, NUMAGENT); 47 48 // An agent may have been interrupted between reporting its initial report 49 // and the `Atomics.wait` call. Try to yield control to ensure the agent 50 // actually started to wait. 51 $262.agent.tryYield(); 52 53 assert.sameValue(Atomics.notify(i32a, WAIT_INDEX, undefined), NUMAGENT, 54 'Atomics.notify(i32a, WAIT_INDEX, undefined) returns the value of `NUMAGENT`'); 55 56 const reports = []; 57 for (var i = 0; i < NUMAGENT; i++) { 58 reports.push($262.agent.getReport()); 59 } 60 reports.sort(); 61 62 assert.sameValue(reports[0], 'A ok', 'The value of reports[0] is "A ok"'); 63 assert.sameValue(reports[1], 'B ok', 'The value of reports[1] is "B ok"'); 64 assert.sameValue(reports[2], 'C ok', 'The value of reports[2] is "C ok"'); 65 assert.sameValue(reports[3], 'D ok', 'The value of reports[3] is "D ok"'); 66 67 reportCompare(0, 0);