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38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
// META: title=Web Locks API: Shared Mode
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// META: global=window,dedicatedworker,sharedworker,serviceworker
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'use strict';
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promise_test(async t => {
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const granted = [];
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function log_grant(n) { return () => { granted.push(n); }; }
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await Promise.all([
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navigator.locks.request('a', {mode: 'shared'}, log_grant(1)),
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navigator.locks.request('b', {mode: 'shared'}, log_grant(2)),
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navigator.locks.request('c', {mode: 'shared'}, log_grant(3)),
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navigator.locks.request('a', {mode: 'shared'}, log_grant(4)),
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navigator.locks.request('b', {mode: 'shared'}, log_grant(5)),
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navigator.locks.request('c', {mode: 'shared'}, log_grant(6)),
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]);
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assert_array_equals(granted, [1, 2, 3, 4, 5, 6]);
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}, 'Lock requests are granted in order');
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promise_test(async t => {
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let a_acquired = false, a_acquired_again = false;
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await navigator.locks.request('a', {mode: 'shared'}, async lock => {
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a_acquired = true;
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// Since lock is held, this request would be blocked if the
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// lock was not 'shared', causing this test to time out.
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await navigator.locks.request('a', {mode: 'shared'}, lock => {
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a_acquired_again = true;
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});
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});
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assert_true(a_acquired, 'first lock acquired');
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assert_true(a_acquired_again, 'second lock acquired');
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}, 'Shared locks are not exclusive');
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