98 lines
3.4 KiB
JavaScript
98 lines
3.4 KiB
JavaScript
// META: title=Web Locks API: Mixed Modes
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// META: script=resources/helpers.js
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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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let unblock;
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const blocked = new Promise(r => { unblock = r; });
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const granted = [];
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// These should be granted immediately, and held until unblocked.
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navigator.locks.request('a', {mode: 'shared'}, async lock => {
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granted.push('a-shared-1'); await blocked; });
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navigator.locks.request('a', {mode: 'shared'}, async lock => {
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granted.push('a-shared-2'); await blocked; });
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navigator.locks.request('a', {mode: 'shared'}, async lock => {
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granted.push('a-shared-3'); await blocked; });
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// This should be blocked.
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let exclusive_lock;
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const exclusive_request = navigator.locks.request('a', async lock => {
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granted.push('a-exclusive');
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exclusive_lock = lock;
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});
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// This should be granted immediately (different name).
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await navigator.locks.request('b', {mode: 'exclusive'}, lock => {
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granted.push('b-exclusive'); });
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assert_array_equals(
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granted, ['a-shared-1', 'a-shared-2', 'a-shared-3', 'b-exclusive']);
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// Release the shared locks granted above.
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unblock();
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// Now the blocked request can be granted.
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await exclusive_request;
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assert_equals(exclusive_lock.mode, 'exclusive');
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assert_array_equals(
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granted,
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['a-shared-1', 'a-shared-2', 'a-shared-3', 'b-exclusive', 'a-exclusive']);
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}, 'Lock requests are granted in order');
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promise_test(async t => {
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const res = uniqueName(t);
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let [promise, resolve] = makePromiseAndResolveFunc();
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const exclusive = navigator.locks.request(res, () => promise);
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for (let i = 0; i < 5; i++) {
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requestLockAndHold(t, res, { mode: "shared" });
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}
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let answer = await navigator.locks.query();
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assert_equals(answer.held.length, 1, "An exclusive lock is held");
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assert_equals(answer.pending.length, 5, "Requests for shared locks are pending");
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resolve();
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await exclusive;
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answer = await navigator.locks.query();
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assert_equals(answer.held.length, 5, "Shared locks are held");
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assert_true(answer.held.every(l => l.mode === "shared"), "All held locks are shared ones");
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}, 'Releasing exclusive lock grants multiple shared locks');
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promise_test(async t => {
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const res = uniqueName(t);
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let [sharedPromise, sharedResolve] = makePromiseAndResolveFunc();
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let [exclusivePromise, exclusiveResolve] = makePromiseAndResolveFunc();
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const sharedReleasedPromise = Promise.all(new Array(5).fill(0).map(
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() => navigator.locks.request(res, { mode: "shared" }, () => sharedPromise))
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);
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const exclusiveReleasedPromise = navigator.locks.request(res, () => exclusivePromise);
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for (let i = 0; i < 5; i++) {
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requestLockAndHold(t, res, { mode: "shared" });
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}
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let answer = await navigator.locks.query();
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assert_equals(answer.held.length, 5, "Shared locks are held");
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assert_true(answer.held.every(l => l.mode === "shared"), "All held locks are shared ones");
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sharedResolve();
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await sharedReleasedPromise;
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answer = await navigator.locks.query();
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assert_equals(answer.held.length, 1, "An exclusive lock is held");
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assert_equals(answer.held[0].mode, "exclusive");
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exclusiveResolve();
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await exclusiveReleasedPromise;
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answer = await navigator.locks.query();
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assert_equals(answer.held.length, 5, "The next shared locks are held");
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assert_true(answer.held.every(l => l.mode === "shared"), "All held locks are shared ones");
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}, 'An exclusive lock between shared locks');
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