The Tor Browser / file comparison
comparison: js/src/tests/js1_8/extensions/peterson.js
js/src/tests/js1_8/extensions/peterson.js
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:306d3756d927 |
|---|---|
| 1 // |reftest| skip | |
| 2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 //----------------------------------------------------------------------- | |
| 8 | |
| 9 var summary = "Peterson's algorithm for mutual exclusion"; | |
| 10 | |
| 11 printStatus(summary); | |
| 12 | |
| 13 var N = 500; // number of iterations | |
| 14 | |
| 15 // the mutex mechanism | |
| 16 var f = [false, false]; | |
| 17 var turn = 0; | |
| 18 | |
| 19 // the resource being protected | |
| 20 var counter = 0; | |
| 21 | |
| 22 function worker(me) { | |
| 23 let him = 1 - me; | |
| 24 | |
| 25 for (let i = 0; i < N; i++) { | |
| 26 // enter the mutex | |
| 27 f[me] = true; | |
| 28 turn = him; | |
| 29 while (f[him] && turn == him) | |
| 30 ; // busy wait | |
| 31 | |
| 32 // critical section | |
| 33 let x = counter; | |
| 34 sleep(0.003); | |
| 35 counter = x+1; | |
| 36 | |
| 37 // leave the mutex | |
| 38 f[me] = false; | |
| 39 } | |
| 40 | |
| 41 return 'ok'; | |
| 42 } | |
| 43 | |
| 44 var expect; | |
| 45 var actual; | |
| 46 | |
| 47 if (typeof scatter == 'undefined' || typeof sleep == 'undefined') { | |
| 48 print('Test skipped. scatter or sleep not defined.'); | |
| 49 expect = actual = 'Test skipped.'; | |
| 50 } else { | |
| 51 var results = scatter ([function() { return worker(0); }, | |
| 52 function() { return worker(1); }]); | |
| 53 expect = "Thread status: [ok,ok], counter: " + (2 * N); | |
| 54 actual = "Thread status: [" + results + "], counter: " + counter; | |
| 55 } | |
| 56 | |
| 57 reportCompare(expect, actual, summary); |
