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// |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 Rick Waldron. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-atomics.exchange
description: Test Atomics.exchange on arrays that allow atomic operations.
includes: [testAtomics.js, testBigIntTypedArray.js]
features: [ArrayBuffer, Atomics, BigInt, DataView, SharedArrayBuffer, Symbol, TypedArray]
---*/
const sab = new SharedArrayBuffer(1024);
const ab = new ArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 2);
testWithBigIntTypedArrayConstructors(function(TA) {
const view = new TA(sab, 32, 20);
const control = new TA(ab, 0, 2);
view[8] = 0n;
assert.sameValue(Atomics.exchange(view, 8, 10n), 0n, 'Atomics.exchange(view, 8, 10n) returns 0n');
assert.sameValue(view[8], 10n, 'The value of view[8] is 10n');
assert.sameValue(
Atomics.exchange(view, 8, -5n),
10n,
'Atomics.exchange(view, 8, -5n) returns 10n'
);
control[0] = -5n;
assert.sameValue(
view[8],
control[0],
'The value of view[8] equals the value of `control[0]` (-5n)'
);
view[3] = -5n;
control[0] = -5n;
assert.sameValue(
Atomics.exchange(view, 3, 0n),
control[0],
'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (-5n)'
);
control[0] = 12345n;
view[3] = 12345n;
assert.sameValue(
Atomics.exchange(view, 3, 0n),
control[0],
'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (12345n)'
);
control[0] = 123456789n;
view[3] = 123456789n;
assert.sameValue(
Atomics.exchange(view, 3, 0n),
control[0],
'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (123456789n)'
);
testWithAtomicsInBoundsIndices(function(IdxGen) {
let Idx = IdxGen(view);
view.fill(0n);
Atomics.store(view, Idx, 37n);
assert.sameValue(
Atomics.exchange(view, Idx, 0n),
37n,
'Atomics.exchange(view, Idx, 0n) returns 37n'
);
});
});
reportCompare(0, 0);
|
