value-not-equal.js (1936B)
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 /*--- 6 esid: sec-atomics.waitasync 7 description: > 8 Returns "not-equal" when value arg does not match an index in the typedArray 9 info: | 10 Atomics.waitAsync( typedArray, index, value, timeout ) 11 12 1. Return DoWait(async, typedArray, index, value, timeout). 13 14 DoWait ( mode, typedArray, index, value, timeout ) 15 16 16. Let w be ! AtomicLoad(typedArray, i). 17 17. If v is not equal to w, then 18 a. Perform LeaveCriticalSection(WL). 19 b. If mode is sync, then 20 i. Return the String "not-equal". 21 c. Perform ! Call(capability.[[Resolve]], undefined, « "not-equal" »). 22 d. Return promiseCapability.[[Promise]]. 23 24 flags: [async] 25 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, computed-property-names, Symbol, Symbol.toPrimitive, Atomics, arrow-function] 26 ---*/ 27 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"'); 28 const i32a = new Int32Array( 29 new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4) 30 ); 31 32 const valueOf = { 33 valueOf() { 34 return undefined; 35 } 36 }; 37 38 const toPrimitive = { 39 [Symbol.toPrimitive]() { 40 return undefined; 41 } 42 }; 43 44 Promise.all([ 45 Atomics.store(i32a, 0, 42), 46 Atomics.waitAsync(i32a, 0, 0).value, 47 ]).then(outcomes => { 48 assert.sameValue(outcomes[0], 42, 'The value of outcomes[0] is 42'); 49 assert.sameValue(outcomes[1], 'not-equal', 'The value of outcomes[1] is "not-equal"'); 50 }).then($DONE, $DONE);