value-not-equal-agent.js (2529B)
1 // |reftest| shell-option(--setpref=atomics_wait_async) skip-if(!this.hasOwnProperty('SharedArrayBuffer')||!this.hasOwnProperty('Atomics')||(this.hasOwnProperty('getBuildConfiguration')&&getBuildConfiguration('arm64-simulator'))||!xulRuntime.shell) async -- SharedArrayBuffer,Atomics is not enabled unconditionally, ARM64 Simulator cannot emulate atomics, requires shell-options 2 // Copyright (C) 2020 Rick Waldron. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 /*--- 5 esid: sec-atomics.waitasync 6 description: > 7 Returns "not-equal" when value arg does not match an index in the typedArray 8 info: | 9 Atomics.waitAsync( typedArray, index, value, timeout ) 10 11 1. Return DoWait(async, typedArray, index, value, timeout). 12 13 DoWait ( mode, typedArray, index, value, timeout ) 14 15 16. Let w be ! AtomicLoad(typedArray, i). 16 17. If v is not equal to w, then 17 a. Perform LeaveCriticalSection(WL). 18 b. If mode is sync, then 19 i. Return the String "not-equal". 20 c. Perform ! Call(capability.[[Resolve]], undefined, « "not-equal" »). 21 d. Return promiseCapability.[[Promise]]. 22 23 flags: [async] 24 includes: [atomicsHelper.js] 25 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, BigInt, arrow-function, async-functions] 26 ---*/ 27 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"'); 28 const RUNNING = 1; 29 const value = 42n; 30 31 $262.agent.start(` 32 $262.agent.receiveBroadcast(function(sab) { 33 const i64a = new BigInt64Array(sab); 34 Atomics.add(i64a, ${RUNNING}, 1n); 35 $262.agent.report(Atomics.store(i64a, 0, 42n)); 36 $262.agent.report(Atomics.waitAsync(i64a, 0, 0n).value); 37 $262.agent.leaving(); 38 }); 39 `); 40 41 const i64a = new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)); 42 43 $262.agent.safeBroadcastAsync(i64a, RUNNING, 1n).then(async agentCount => { 44 assert.sameValue(agentCount, 1n, 'The value of `agentCount` is 1n'); 45 46 assert.sameValue( 47 await $262.agent.getReportAsync(), 48 value.toString(), 49 '(await $262.agent.getReportAsync()) must return the same value returned by value.toString()' 50 ); 51 52 assert.sameValue( 53 await $262.agent.getReportAsync(), 54 'not-equal', 55 '(await $262.agent.getReportAsync()) resolves to the value "not-equal"' 56 ); 57 58 assert.sameValue( 59 Atomics.notify(i64a, 0, 1), 60 0, 61 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)), 0, 1) must return 0' 62 ); 63 }).then($DONE, $DONE);