<!
DOCTYPE html>
<
meta charset=utf-8>
<
title>Web Locks API: Workers</
title>
<
link rel=help href=
"https://w3c.github.io/web-locks/">
<
script src=
"/resources/testharness.js"></
script>
<
script src=
"/resources/testharnessreport.js"></
script>
<
script src=
"resources/helpers.js"></
script>
<
script>
'use strict';
promise_test(async t => {
assert_implements(navigator.locks);
const worker = new Worker(
'resources/worker.js');
t.add_cleanup(() => { worker.terminate(); });
const res =
'shared resource 1';
const lock_id = (await postToWorkerAndWait(
worker, {op:
'request', name: res, mode:
'shared'})).lock_id;
await navigator.locks.request(res, {mode:
'shared'}, async lock => {
await postToWorkerAndWait(worker, {op:
'release', lock_id});
});
},
'Window and Worker - shared mode');
promise_test(async t => {
assert_implements(navigator.locks);
const worker = new Worker(
'resources/worker.js');
t.add_cleanup(() => { worker.terminate(); });
const res =
'exclusive resource 1';
// worker acquires the lock.
const lock_id = (await postToWorkerAndWait(
worker, {op:
'request', name: res})).lock_id;
// This request should be blocked.
let lock_granted = false;
const blocked = navigator.locks.request(
res, lock => { lock_granted = true; });
// Verify we can
't get it.
let available = undefined;
await navigator.locks.request(
res, {ifAvailable: true}, lock => { available = lock !== null; });
assert_false(available);
assert_false(lock_granted);
// Ask the worker to release it.
await postToWorkerAndWait(worker, {op:
'release', lock_id});
// Now we
've got it.
const lock2 = await blocked;
assert_true(lock_granted);
},
'Window and Worker - exclusive mode');
promise_test(async t => {
assert_implements(navigator.locks);
const worker1 = new Worker(
'resources/worker.js');
const worker2 = new Worker(
'resources/worker.js');
t.add_cleanup(() => { worker1.terminate(); worker2.terminate(); });
const res =
'exclusive resource 2';
// worker1 acquires the lock.
const lock_id = (await postToWorkerAndWait(
worker1, {op:
'request', name: res})).lock_id;
// This request should be blocked.
let lock_granted = false;
const blocked = postToWorkerAndWait(
worker2, {op:
'request', name: res});
blocked.then(f => { lock_granted = true; });
// Verify worker2 can
't get it.
assert_true((await postToWorkerAndWait(worker2, {
op:
'request', name: res, ifAvailable: true
})).failed,
'Lock request should have failed');
assert_false(lock_granted);
// Ask worker1 to release it.
await postToWorkerAndWait(worker1, {op:
'release', lock_id});
// Now worker2 can get it.
const lock = await blocked;
assert_true(lock_granted);
},
'Worker and Worker - exclusive mode');
promise_test(async t => {
assert_implements(navigator.locks);
const worker = new Worker(
'resources/worker.js');
const res =
'exclusive resource 3';
// Worker acquires the lock.
await postToWorkerAndWait(worker, {op:
'request', name: res});
// This request should be blocked.
let lock_granted = false;
const blocked = navigator.locks.request(
res, lock => { lock_granted = true; });
// Verify we can
't get it.
let available = undefined;
await navigator.locks.request(
res, {ifAvailable: true}, lock => { available = lock !== null; });
assert_false(available);
assert_false(lock_granted);
// Implicitly release it by terminating the worker.
worker.terminate();
// Now we
've got it.
const lock = await blocked;
assert_true(lock_granted);
},
'Terminated Worker - exclusive mode');
</
script>
