tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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good-views.js (2248B)

      1 // |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
      2 // Copyright (C) 2018 Rick Waldron. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 esid: sec-atomics.exchange
      6 description: Test Atomics.exchange on arrays that allow atomic operations.
      7 includes: [testAtomics.js, testBigIntTypedArray.js]
      8 features: [ArrayBuffer, Atomics, BigInt, DataView, SharedArrayBuffer, Symbol, TypedArray]
      9 ---*/
     10 const sab = new SharedArrayBuffer(1024);
     11 const ab = new ArrayBuffer(BigInt64Array.BYTES_PER_ELEMENT * 2);
     12 
     13 testWithBigIntTypedArrayConstructors(function(TA) {
     14  const view = new TA(sab, 32, 20);
     15  const control = new TA(ab, 0, 2);
     16  view[8] = 0n;
     17  assert.sameValue(Atomics.exchange(view, 8, 10n), 0n, 'Atomics.exchange(view, 8, 10n) returns 0n');
     18  assert.sameValue(view[8], 10n, 'The value of view[8] is 10n');
     19 
     20  assert.sameValue(
     21    Atomics.exchange(view, 8, -5n),
     22    10n,
     23    'Atomics.exchange(view, 8, -5n) returns 10n'
     24  );
     25 
     26  control[0] = -5n;
     27 
     28  assert.sameValue(
     29    view[8],
     30    control[0],
     31    'The value of view[8] equals the value of `control[0]` (-5n)'
     32  );
     33 
     34  view[3] = -5n;
     35  control[0] = -5n;
     36 
     37  assert.sameValue(
     38    Atomics.exchange(view, 3, 0n),
     39    control[0],
     40    'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (-5n)'
     41  );
     42 
     43  control[0] = 12345n;
     44  view[3] = 12345n;
     45 
     46  assert.sameValue(
     47    Atomics.exchange(view, 3, 0n),
     48    control[0],
     49    'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (12345n)'
     50  );
     51 
     52  control[0] = 123456789n;
     53  view[3] = 123456789n;
     54 
     55  assert.sameValue(
     56    Atomics.exchange(view, 3, 0n),
     57    control[0],
     58    'Atomics.exchange(view, 3, 0n) returns the value of `control[0]` (123456789n)'
     59  );
     60 
     61  testWithAtomicsInBoundsIndices(function(IdxGen) {
     62    let Idx = IdxGen(view);
     63    view.fill(0n);
     64    Atomics.store(view, Idx, 37n);
     65 
     66    assert.sameValue(
     67      Atomics.exchange(view, Idx, 0n),
     68      37n,
     69      'Atomics.exchange(view, Idx, 0n) returns 37n'
     70    );
     71  });
     72 });
     73 
     74 reportCompare(0, 0);