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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/built-ins/Atomics/wait/waiterlist-order-of-operations-is-fifo.js | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Atomics/wait/waiterlist-order-of-operations-is-fifo.js b/js/src/tests/test262/built-ins/Atomics/wait/waiterlist-order-of-operations-is-fifo.js new file mode 100644 index 0000000000..42fd5d4827 --- /dev/null +++ b/js/src/tests/test262/built-ins/Atomics/wait/waiterlist-order-of-operations-is-fifo.js @@ -0,0 +1,96 @@ +// |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 +// Copyright (C) 2018 Amal Hussein. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-atomics.wait +description: > + New waiters should be applied to the end of the list and woken by order they entered the list (FIFO) +info: | + Atomics.wait( typedArray, index, value, timeout ) + + 16.Perform AddWaiter(WL, W). + ... + 3.Add W to the end of the list of waiters in WL. + +includes: [atomicsHelper.js] +features: [Atomics, SharedArrayBuffer, TypedArray] +---*/ + +var NUMAGENT = 3; + +var WAIT_INDEX = 0; +var RUNNING = 1; +var LOCK_INDEX = 2; + +for (var i = 0; i < NUMAGENT; i++) { + var agentNum = i; + + $262.agent.start(` + $262.agent.receiveBroadcast(function(sab) { + const i32a = new Int32Array(sab); + Atomics.add(i32a, ${RUNNING}, 1); + + // Synchronize workers before reporting the initial report. + while (Atomics.compareExchange(i32a, ${LOCK_INDEX}, 0, 1) !== 0) ; + + // Report the agent number before waiting. + $262.agent.report(${agentNum}); + + // Wait until restarted by main thread. + var status = Atomics.wait(i32a, ${WAIT_INDEX}, 0); + + // Report wait status. + $262.agent.report(status); + + // Report the agent number after waiting. + $262.agent.report(${agentNum}); + + $262.agent.leaving(); + }); + `); +} + +const i32a = new Int32Array( + new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT * 4) +); + +$262.agent.safeBroadcast(i32a); + +// Wait until all agents started. +$262.agent.waitUntil(i32a, RUNNING, NUMAGENT); + +// Agents may be started in any order. +const started = []; +for (var i = 0; i < NUMAGENT; i++) { + // Wait until an agent entered its critical section. + $262.agent.waitUntil(i32a, LOCK_INDEX, 1); + + // Record the agent number. + started.push($262.agent.getReport()); + + // The agent may have been interrupted between reporting its initial report + // and the `Atomics.wait` call. Try to yield control to ensure the agent + // actually started to wait. + $262.agent.tryYield(); + + // Now continue with the next agent. + Atomics.store(i32a, LOCK_INDEX, 0); +} + +// Agents must notify in the order they waited. +for (var i = 0; i < NUMAGENT; i++) { + var woken = 0; + while ((woken = Atomics.notify(i32a, WAIT_INDEX, 1)) === 0) ; + + assert.sameValue(woken, 1, + 'Atomics.notify(i32a, WAIT_INDEX, 1) returns 1, at index = ' + i); + + assert.sameValue($262.agent.getReport(), 'ok', + '$262.agent.getReport() returns "ok", at index = ' + i); + + assert.sameValue($262.agent.getReport(), started[i], + '$262.agent.getReport() returns the value of `started[' + i + ']`'); +} + +reportCompare(0, 0); |