third_party/WebKit/LayoutTests/fast/workers/worker-sharedarraybuffer-transfer.html

   1 <!DOCTYPE html>
   2 <html>
   3 <body>
   4 <p>Test sharing SharedArrayBuffers between dedicated workers.</p>
   5 <div id="result"></div>
   6 <script type="text/javascript">
   7 function log(message)
   8 {
   9     document.getElementById("result").innerHTML += message + "</br>";
  10 }
  11
  12 if (window.testRunner) {
  13     testRunner.dumpAsText();
  14     testRunner.waitUntilDone();
  15 }
  16
  17 var testCases = [
  18     {name: "SharedArrayBuffer"},
  19     {name: "Int8Array"},
  20     {name: "Uint8Array"},
  21     {name: "Uint8ClampedArray"},
  22     {name: "Int16Array"},
  23     {name: "Uint16Array"},
  24     {name: "Int32Array"},
  25     {name: "Uint32Array"},
  26     {name: "Float32Array"},
  27     {name: "Float64Array"}
  28 ];
  29 var currentTestCase = 0;
  30
  31 function runTestCase(testCase) {
  32     var length = 8;
  33     var name = testCase.name;
  34     var type = window[name];
  35     var sab;
  36     var ta;
  37
  38     log("Running " + name + " test case");
  39
  40     if (testCase.name == 'SharedArrayBuffer') {
  41         sab = new SharedArrayBuffer(length);
  42         ta = new Uint8Array(sab);
  43     } else {
  44         sab = new SharedArrayBuffer(length * type.BYTES_PER_ELEMENT);
  45         ta = new type(sab);
  46     }
  47
  48     var i;
  49     for (i = 0; i < length; ++i)
  50         ta[i] = i;
  51
  52     // Without Atomics, we can't safely test modifying the contents of the
  53     // SharedArrayBuffer. All we can test for now is that the SharedArrayBuffer
  54     // is not neutered when transferred to a Worker.
  55     if (testCase.name == 'SharedArrayBuffer')
  56         worker.postMessage({name: name, data: sab, length: length}, [sab]);
  57     else
  58         worker.postMessage({name: name, data: ta, length: length}, [sab]);
  59
  60     if (sab.length === 0)
  61         log("FAIL: SharedArrayBuffer was neutered during transfer.");
  62     else
  63         log("PASS: SharedArrayBuffer not neutered during transfer.");
  64
  65     // Ensure the data wasn't changed.
  66     for (i = 0; i < length; ++i) {
  67         if (ta[i] != i) {
  68             log("FAIL: Original data changed during transfer. Expected " + i +
  69                 " got " + ta[i]);
  70             break;
  71         }
  72     }
  73     if (i == length)
  74         log("PASS: Original data not changed during transfer.");
  75 }
  76
  77 if (window.internals && internals.runtimeFlags.sharedArrayBufferEnabled && window.SharedArrayBuffer) {
  78     var worker = new Worker('resources/worker-sharedarraybuffer-transfer.js');
  79
  80     runTestCase(testCases[currentTestCase]);
  81
  82     worker.onmessage = function(e) {
  83         if (e.data == 'DONE') {
  84             // The current test case is finished.
  85             if (++currentTestCase == testCases.length) {
  86                 log("DONE");
  87                 testRunner.notifyDone();
  88             } else {
  89                 runTestCase(testCases[currentTestCase]);
  90             }
  91         } else {
  92             // The worker sent a pass/fail message.
  93             log(e.data);
  94         }
  95
  96     };
  97 } else {
  98     log("SharedArrayBuffers are not enabled -- skipping test.");
  99     testRunner.notifyDone();
 100 }
 101
 102 </script>
 103 </body>
 104 </html>