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