no-spurious-wakeup-no-operation.js (2689B)
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 Test that Atomics.waitAsync returns the right result when it timed out and that 8 the time to time out is reasonable. 9 info: | 10 AddWaiter ( WL, waiterRecord ) 11 12 5. Append waiterRecord as the last element of WL.[[Waiters]] 13 6. If waiterRecord.[[Timeout]] is finite, then in parallel, 14 a. Wait waiterRecord.[[Timeout]] milliseconds. 15 b. Perform TriggerTimeout(WL, waiterRecord). 16 17 TriggerTimeout( WL, waiterRecord ) 18 19 3. If waiterRecord is in WL.[[Waiters]], then 20 a. Set waiterRecord.[[Result]] to "timed-out". 21 b. Perform RemoveWaiter(WL, waiterRecord). 22 c. Perform NotifyWaiter(WL, waiterRecord). 23 4. Perform LeaveCriticalSection(WL). 24 25 flags: [async] 26 includes: [atomicsHelper.js] 27 features: [Atomics.waitAsync, SharedArrayBuffer, TypedArray, Atomics, BigInt, arrow-function, async-functions] 28 ---*/ 29 assert.sameValue(typeof Atomics.waitAsync, 'function', 'The value of `typeof Atomics.waitAsync` is "function"'); 30 const RUNNING = 1; 31 const TIMEOUT = $262.agent.timeouts.small; 32 const i64a = new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)); 33 34 $262.agent.start(` 35 $262.agent.receiveBroadcast(async (sab) => { 36 const i64a = new BigInt64Array(sab); 37 Atomics.add(i64a, ${RUNNING}, 1n); 38 39 const before = $262.agent.monotonicNow(); 40 const unpark = await Atomics.waitAsync(i64a, 0, 0n, ${TIMEOUT}).value; 41 const duration = $262.agent.monotonicNow() - before; 42 43 $262.agent.report(duration); 44 $262.agent.report(unpark); 45 $262.agent.leaving(); 46 }); 47 `); 48 49 $262.agent.safeBroadcastAsync(i64a, RUNNING, 1n).then(async agentCount => { 50 assert.sameValue(agentCount, 1n, 'The value of `agentCount` is 1n'); 51 const lapse = await $262.agent.getReportAsync(); 52 assert(lapse >= TIMEOUT, 'The result of evaluating `(lapse >= TIMEOUT)` is true'); 53 const result = await $262.agent.getReportAsync(); 54 assert.sameValue(result, 'timed-out', 'The value of `result` is "timed-out"'); 55 56 assert.sameValue( 57 Atomics.notify(i64a, 0), 58 0, 59 'Atomics.notify(new BigInt64Array(new SharedArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 4)), 0) must return 0' 60 ); 61 }).then($DONE, $DONE);