tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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good-views.js (2864B)

      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.compareexchange
      6 description: Test Atomics.compareExchange 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 
     18  assert.sameValue(
     19    Atomics.compareExchange(view, 8, 0n, 10n),
     20    0n,
     21    'Atomics.compareExchange(view, 8, 0n, 10n) returns 0n'
     22  );
     23 
     24  assert.sameValue(view[8], 10n, 'The value of view[8] is 10n');
     25  view[8] = 0n;
     26 
     27  assert.sameValue(
     28    Atomics.compareExchange(view, 8, 1n, 10n),
     29    0n,
     30    'Atomics.compareExchange(view, 8, 1n, 10n) returns 0n'
     31  );
     32 
     33  assert.sameValue(view[8], 0n, 'The value of view[8] is 0n');
     34  view[8] = 0n;
     35 
     36  assert.sameValue(
     37    Atomics.compareExchange(view, 8, 0n, -5n),
     38    0n,
     39    'Atomics.compareExchange(view, 8, 0n, -5n) returns 0n'
     40  );
     41 
     42  control[0] = -5n;
     43 
     44  assert.sameValue(
     45    view[8],
     46    control[0],
     47    'The value of view[8] equals the value of `control[0]` (-5n)'
     48  );
     49 
     50  view[3] = -5n;
     51  control[0] = -5n;
     52 
     53  assert.sameValue(
     54    Atomics.compareExchange(view, 3, -5n, 0n),
     55    control[0],
     56    'Atomics.compareExchange(view, 3, -5n, 0n) returns the value of `control[0]` (-5n)'
     57  );
     58 
     59  assert.sameValue(view[3], 0n, 'The value of view[3] is 0n');
     60  control[0] = 12345n;
     61  view[3] = 12345n;
     62 
     63  assert.sameValue(
     64    Atomics.compareExchange(view, 3, 12345n, 0n),
     65    control[0],
     66    'Atomics.compareExchange(view, 3, 12345n, 0n) returns the value of `control[0]` (12345n)'
     67  );
     68 
     69  assert.sameValue(view[3], 0n, 'The value of view[3] is 0n');
     70  control[0] = 123456789n;
     71  view[3] = 123456789n;
     72 
     73  assert.sameValue(
     74    Atomics.compareExchange(view, 3, 123456789n, 0n),
     75    control[0],
     76    'Atomics.compareExchange(view, 3, 123456789n, 0n) returns the value of `control[0]` (123456789n)'
     77  );
     78 
     79  assert.sameValue(view[3], 0n, 'The value of view[3] is 0n');
     80 
     81  testWithAtomicsInBoundsIndices(function(IdxGen) {
     82    let Idx = IdxGen(view);
     83    view.fill(0n);
     84    Atomics.store(view, Idx, 37n);
     85 
     86    assert.sameValue(
     87      Atomics.compareExchange(view, Idx, 37n, 0n),
     88      37n,
     89      'Atomics.compareExchange(view, Idx, 37n, 0n) returns 37n'
     90    );
     91  });
     92 });
     93 
     94 reportCompare(0, 0);