count-defaults-to-infinity-missing.js (2446B)
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 Default to +Infinity when missing 'count' argument to Atomics.notify 9 info: | 10 Atomics.notify( typedArray, index, count ) 11 12 ... 13 3. If count is undefined, let c be +∞. 14 ... 15 16 includes: [atomicsHelper.js] 17 features: [Atomics, SharedArrayBuffer, TypedArray] 18 ---*/ 19 20 const RUNNING = 0; // Index to notify agent has started. 21 const WAIT_INDEX = 1; // Index all agents are waiting on. 22 const BUFFER_SIZE = 2; 23 24 const NUMAGENT = 4; // Total number of agents started 25 26 for (var i = 0; i < NUMAGENT; i++) { 27 $262.agent.start(` 28 $262.agent.receiveBroadcast(function(sab) { 29 const i32a = new Int32Array(sab); 30 Atomics.add(i32a, ${RUNNING}, 1); 31 32 // Wait until restarted by main thread. 33 var status = Atomics.wait(i32a, ${WAIT_INDEX}, 0); 34 35 // Report wait status and then exit the agent. 36 var name = String.fromCharCode(0x41 + ${i}); // "A", "B", "C", or "D" 37 $262.agent.report(name + " " + status); 38 $262.agent.leaving(); 39 }); 40 `); 41 } 42 43 const i32a = new Int32Array( 44 new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * BUFFER_SIZE) 45 ); 46 47 $262.agent.safeBroadcast(i32a); 48 $262.agent.waitUntil(i32a, RUNNING, NUMAGENT); 49 50 // An agent may have been interrupted between reporting its initial report 51 // and the `Atomics.wait` call. Try to yield control to ensure the agent 52 // actually started to wait. 53 $262.agent.tryYield(); 54 55 assert.sameValue(Atomics.notify(i32a, WAIT_INDEX /*, count missing */), NUMAGENT, 56 'Atomics.notify(i32a, WAIT_INDEX /*, count missing */) returns the value of `NUMAGENT`'); 57 58 const reports = []; 59 for (var i = 0; i < NUMAGENT; i++) { 60 reports.push($262.agent.getReport()); 61 } 62 reports.sort(); 63 64 assert.sameValue(reports[0], 'A ok', 'The value of reports[0] is "A ok"'); 65 assert.sameValue(reports[1], 'B ok', 'The value of reports[1] is "B ok"'); 66 assert.sameValue(reports[2], 'C ok', 'The value of reports[2] is "C ok"'); 67 assert.sameValue(reports[3], 'D ok', 'The value of reports[3] is "D ok"'); 68 69 reportCompare(0, 0);