waiterlist-block-indexedposition-wake.js (3212B)
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 Get the correct WaiterList 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 11. Let indexedPosition be (i × 4) + offset. 17 12. Let WL be GetWaiterList(block, indexedPosition). 18 19 GetWaiterList( block, i ) 20 21 ... 22 4. Return the WaiterList that is referenced by the pair (block, i). 23 24 flags: [async] 25 includes: [atomicsHelper.js] 26 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, arrow-function, async-functions] 27 ---*/ 28 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"'); 29 30 const NUMAGENT = 2; 31 const RUNNING = 4; 32 33 $262.agent.start(` 34 $262.agent.receiveBroadcast(async (sab) => { 35 const i32a = new Int32Array(sab); 36 Atomics.add(i32a, ${RUNNING}, 1); 37 38 // Wait on index 0 39 $262.agent.report(await Atomics.waitAsync(i32a, 0, 0, Infinity).value); 40 $262.agent.leaving(); 41 }); 42 `); 43 44 $262.agent.start(` 45 $262.agent.receiveBroadcast(async (sab) => { 46 const i32a = new Int32Array(sab); 47 Atomics.add(i32a, ${RUNNING}, 1); 48 49 // Wait on index 2 50 $262.agent.report(await Atomics.waitAsync(i32a, 2, 0, Infinity).value); 51 $262.agent.leaving(); 52 }); 53 `); 54 55 const i32a = new Int32Array( 56 new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 5) 57 ); 58 59 $262.agent.safeBroadcastAsync(i32a, RUNNING, NUMAGENT).then(async (agentCount) => { 60 61 assert.sameValue(agentCount, NUMAGENT, 'The value of `agentCount` is expected to equal the value of NUMAGENT'); 62 63 // Notify index 1, notifies nothing 64 assert.sameValue(Atomics.notify(i32a, 1), 0, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 5)), 1) must return 0'); 65 66 // Notify index 3, notifies nothing 67 assert.sameValue(Atomics.notify(i32a, 3), 0, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 5)), 3) must return 0'); 68 69 // Notify index 2, notifies 1 70 assert.sameValue(Atomics.notify(i32a, 2), 1, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 5)), 2) must return 1'); 71 assert.sameValue( 72 await $262.agent.getReportAsync(), 73 'ok', 74 '(await $262.agent.getReportAsync()) resolves to the value "ok"' 75 ); 76 77 // Notify index 0, notifies 1 78 assert.sameValue(Atomics.notify(i32a, 0), 1, 'Atomics.notify(new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 5)), 0) must return 1'); 79 assert.sameValue( 80 await $262.agent.getReportAsync(), 81 'ok', 82 '(await $262.agent.getReportAsync()) resolves to the value "ok"' 83 ); 84 85 }).then($DONE, $DONE);