mirror of
https://github.com/denoland/deno.git
synced 2025-01-11 16:42:21 -05:00
refactor(timers): refactor timers to use one async op per timer (#12862)
This change also makes the timers implementation closer to the spec, and sets up the stage to implement AbortSignal.timeout() (whatwg/dom#1032). Fixes #8965 Fixes #10974 Fixes #11398
This commit is contained in:
Andreu Botella
GitHub
parent
5027826a64
commit
33da15ae5a
8 changed files with 486 additions and 623 deletions
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@ -156,6 +156,12 @@ itest!(ops_sanitizer_timeout_failure {
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output: "test/ops_sanitizer_timeout_failure.out",
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});
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itest!(ops_sanitizer_multiple_timeout_tests {
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args: "test test/ops_sanitizer_multiple_timeout_tests.ts",
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exit_code: 1,
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output: "test/ops_sanitizer_multiple_timeout_tests.out",
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});
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itest!(ops_sanitizer_nexttick {
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args: "test test/ops_sanitizer_nexttick.ts",
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output: "test/ops_sanitizer_nexttick.out",
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57
cli/tests/testdata/test/ops_sanitizer_multiple_timeout_tests.out
vendored
Normal file
57
cli/tests/testdata/test/ops_sanitizer_multiple_timeout_tests.out
vendored
Normal file
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@ -0,0 +1,57 @@
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Check [WILDCARD]/testdata/test/ops_sanitizer_multiple_timeout_tests.ts
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running 2 tests from [WILDCARD]/testdata/test/ops_sanitizer_multiple_timeout_tests.ts
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test test 1 ... FAILED ([WILDCARD])
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test test 2 ... FAILED ([WILDCARD])
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failures:
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test 1
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AssertionError: Test case is leaking async ops.
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Before:
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- dispatched: 0
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- completed: 0
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After:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Ops:
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op_sleep:
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Before:
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- dispatched: 0
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- completed: 0
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After:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Make sure to await all promises returned from Deno APIs before
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finishing test case.
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at [WILDCARD]
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test 2
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AssertionError: Test case is leaking async ops.
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Before:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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After:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Ops:
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op_sleep:
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Before:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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After:
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Make sure to await all promises returned from Deno APIs before
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finishing test case.
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at [WILDCARD]
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failures:
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test 1
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test 2
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test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
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error: Test failed
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10
cli/tests/testdata/test/ops_sanitizer_multiple_timeout_tests.ts
vendored
Normal file
10
cli/tests/testdata/test/ops_sanitizer_multiple_timeout_tests.ts
vendored
Normal file
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@ -0,0 +1,10 @@
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// https://github.com/denoland/deno/issues/8965
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function test() {
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setTimeout(() => {}, 10000);
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setTimeout(() => {}, 10001);
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}
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Deno.test("test 1", test);
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Deno.test("test 2", test);
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@ -11,16 +11,16 @@ Before:
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- dispatched: 1
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- completed: 1
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After:
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- dispatched: 3
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- completed: 2
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Ops:
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op_global_timer:
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op_sleep:
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Before:
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- dispatched: 1
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- completed: 1
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After:
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- dispatched: 3
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- completed: 2
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- dispatched: [WILDCARD]
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- completed: [WILDCARD]
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Make sure to await all promises returned from Deno APIs before
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finishing test case.
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@ -2,7 +2,7 @@ error: Uncaught (in worker "") Error
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throw new Error();
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^
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at [WILDCARD]/workers/drop_handle_race.js:2:9
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at fire (deno:ext/timers/[WILDCARD])
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at Object.action (deno:ext/timers/[WILDCARD])
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at handleTimerMacrotask (deno:ext/timers/[WILDCARD])
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error: Uncaught (in promise) Error: Unhandled error event in child worker.
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at Worker.#pollControl (deno:runtime/js/11_workers.js:[WILDCARD])
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@ -6,6 +6,7 @@ import {
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Deferred,
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deferred,
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delay,
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unreachable,
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} from "./test_util.ts";
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Deno.test(async function functionParameterBindingSuccess() {
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@ -206,6 +207,60 @@ Deno.test(function intervalCancelInvalidSilentFail() {
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clearInterval(2147483647);
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});
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Deno.test(async function callbackTakesLongerThanInterval() {
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const promise = deferred();
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let timeEndOfFirstCallback: number | undefined;
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const interval = setInterval(() => {
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if (timeEndOfFirstCallback === undefined) {
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// First callback
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Deno.sleepSync(300);
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timeEndOfFirstCallback = Date.now();
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} else {
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// Second callback
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assert(Date.now() - 100 >= timeEndOfFirstCallback);
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clearInterval(interval);
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promise.resolve();
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}
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}, 100);
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await promise;
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});
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// https://github.com/denoland/deno/issues/11398
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Deno.test(async function clearTimeoutAfterNextTimerIsDue1() {
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const promise = deferred();
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setTimeout(() => {
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promise.resolve();
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}, 300);
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const interval = setInterval(() => {
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Deno.sleepSync(400);
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// Both the interval and the timeout's due times are now in the past.
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clearInterval(interval);
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}, 100);
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await promise;
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});
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// https://github.com/denoland/deno/issues/11398
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Deno.test(async function clearTimeoutAfterNextTimerIsDue2() {
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const promise = deferred();
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const timeout1 = setTimeout(unreachable, 100);
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setTimeout(() => {
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promise.resolve();
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}, 200);
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Deno.sleepSync(300);
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// Both of the timeouts' due times are now in the past.
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clearTimeout(timeout1);
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await promise;
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});
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Deno.test(async function fireCallbackImmediatelyWhenDelayOverMaxValue() {
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let count = 0;
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setTimeout(() => {
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@ -346,6 +401,35 @@ Deno.test(async function timerMaxCpuBug() {
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assert(opsDispatched_ - opsDispatched < 10);
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});
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Deno.test(async function timerOrdering() {
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const array: number[] = [];
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const donePromise = deferred();
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function push(n: number) {
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array.push(n);
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if (array.length === 6) {
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donePromise.resolve();
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}
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}
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setTimeout(() => {
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push(1);
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setTimeout(() => push(4));
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}, 0);
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setTimeout(() => {
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push(2);
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setTimeout(() => push(5));
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}, 0);
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setTimeout(() => {
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push(3);
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setTimeout(() => push(6));
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}, 0);
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await donePromise;
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assertEquals(array, [1, 2, 3, 4, 5, 6]);
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});
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Deno.test(async function timerBasicMicrotaskOrdering() {
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let s = "";
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let count = 0;
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@ -4,23 +4,21 @@
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((window) => {
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const core = window.Deno.core;
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const {
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ArrayPrototypeIndexOf,
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ArrayPrototypePush,
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ArrayPrototypeShift,
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ArrayPrototypeSplice,
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DateNow,
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Error,
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FunctionPrototypeBind,
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FunctionPrototypeCall,
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Map,
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MapPrototypeDelete,
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MapPrototypeGet,
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MapPrototypeHas,
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MapPrototypeSet,
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MathMax,
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Number,
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String,
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// deno-lint-ignore camelcase
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NumberPOSITIVE_INFINITY,
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PromisePrototypeThen,
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TypeError,
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} = window.__bootstrap.primordials;
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const { webidl } = window.__bootstrap;
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// Shamelessly cribbed from extensions/fetch/11_streams.js
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class AssertionError extends Error {
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@ -41,18 +39,6 @@
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}
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}
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function opStopGlobalTimer() {
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core.opSync("op_global_timer_stop");
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}
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function opStartGlobalTimer(timeout) {
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return core.opSync("op_global_timer_start", timeout);
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}
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async function opWaitGlobalTimer() {
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await core.opAsync("op_global_timer");
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}
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function opNow() {
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return core.opSync("op_now");
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}
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@ -61,424 +47,263 @@
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return core.opSync("op_sleep_sync", millis);
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}
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// Derived from https://github.com/vadimg/js_bintrees. MIT Licensed.
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// ---------------------------------------------------------------------------
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class RBNode {
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constructor(data) {
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this.data = data;
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this.left = null;
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this.right = null;
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this.red = true;
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}
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/**
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* The task queue corresponding to the timer task source.
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*
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* @type { {action: () => void, nestingLevel: number}[] }
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*/
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const timerTasks = [];
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getChild(dir) {
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return dir ? this.right : this.left;
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}
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/**
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* The current task's timer nesting level, or zero if we're not currently
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* running a timer task (since the minimum nesting level is 1).
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*
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* @type {number}
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*/
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let timerNestingLevel = 0;
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setChild(dir, val) {
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if (dir) {
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this.right = val;
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} else {
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this.left = val;
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}
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}
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}
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class RBTree {
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#comparator = null;
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#root = null;
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constructor(comparator) {
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this.#comparator = comparator;
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this.#root = null;
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}
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/** Returns `null` if tree is empty. */
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min() {
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let res = this.#root;
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if (res === null) {
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return null;
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}
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while (res.left !== null) {
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res = res.left;
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}
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return res.data;
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}
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/** Returns node `data` if found, `null` otherwise. */
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find(data) {
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let res = this.#root;
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while (res !== null) {
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const c = this.#comparator(data, res.data);
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if (c === 0) {
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return res.data;
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} else {
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res = res.getChild(c > 0);
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}
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}
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return null;
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}
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/** returns `true` if inserted, `false` if duplicate. */
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insert(data) {
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let ret = false;
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if (this.#root === null) {
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// empty tree
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this.#root = new RBNode(data);
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ret = true;
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} else {
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const head = new RBNode(null); // fake tree root
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let dir = 0;
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let last = 0;
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// setup
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let gp = null; // grandparent
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let ggp = head; // grand-grand-parent
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let p = null; // parent
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let node = this.#root;
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ggp.right = this.#root;
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// search down
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while (true) {
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if (node === null) {
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// insert new node at the bottom
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node = new RBNode(data);
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p.setChild(dir, node);
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ret = true;
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} else if (isRed(node.left) && isRed(node.right)) {
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// color flip
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node.red = true;
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node.left.red = false;
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node.right.red = false;
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}
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// fix red violation
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if (isRed(node) && isRed(p)) {
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const dir2 = ggp.right === gp;
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assert(gp);
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if (node === p.getChild(last)) {
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ggp.setChild(dir2, singleRotate(gp, !last));
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} else {
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ggp.setChild(dir2, doubleRotate(gp, !last));
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}
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}
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const cmp = this.#comparator(node.data, data);
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// stop if found
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if (cmp === 0) {
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break;
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}
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last = dir;
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dir = Number(cmp < 0); // Fix type
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// update helpers
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if (gp !== null) {
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ggp = gp;
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}
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gp = p;
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p = node;
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node = node.getChild(dir);
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}
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// update root
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this.#root = head.right;
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}
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// make root black
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this.#root.red = false;
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return ret;
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}
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/** Returns `true` if removed, `false` if not found. */
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remove(data) {
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if (this.#root === null) {
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return false;
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}
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const head = new RBNode(null); // fake tree root
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let node = head;
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node.right = this.#root;
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let p = null; // parent
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let gp = null; // grand parent
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let found = null; // found item
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let dir = 1;
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while (node.getChild(dir) !== null) {
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const last = dir;
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// update helpers
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gp = p;
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p = node;
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node = node.getChild(dir);
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const cmp = this.#comparator(data, node.data);
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dir = cmp > 0;
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// save found node
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if (cmp === 0) {
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found = node;
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}
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// push the red node down
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if (!isRed(node) && !isRed(node.getChild(dir))) {
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if (isRed(node.getChild(!dir))) {
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const sr = singleRotate(node, dir);
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p.setChild(last, sr);
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p = sr;
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} else if (!isRed(node.getChild(!dir))) {
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const sibling = p.getChild(!last);
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if (sibling !== null) {
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if (
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!isRed(sibling.getChild(!last)) &&
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!isRed(sibling.getChild(last))
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) {
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// color flip
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p.red = false;
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sibling.red = true;
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node.red = true;
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} else {
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assert(gp);
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const dir2 = gp.right === p;
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if (isRed(sibling.getChild(last))) {
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gp.setChild(dir2, doubleRotate(p, last));
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} else if (isRed(sibling.getChild(!last))) {
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gp.setChild(dir2, singleRotate(p, last));
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}
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// ensure correct coloring
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const gpc = gp.getChild(dir2);
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assert(gpc);
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gpc.red = true;
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node.red = true;
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assert(gpc.left);
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gpc.left.red = false;
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assert(gpc.right);
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gpc.right.red = false;
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}
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}
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||||
}
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}
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}
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// replace and remove if found
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if (found !== null) {
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found.data = node.data;
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assert(p);
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p.setChild(p.right === node, node.getChild(node.left === null));
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}
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// update root and make it black
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this.#root = head.right;
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if (this.#root !== null) {
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this.#root.red = false;
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}
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return found !== null;
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}
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}
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function isRed(node) {
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return node !== null && node.red;
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}
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function singleRotate(root, dir) {
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const save = root.getChild(!dir);
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assert(save);
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root.setChild(!dir, save.getChild(dir));
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save.setChild(dir, root);
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||||
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root.red = true;
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save.red = false;
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||||
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||||
return save;
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||||
}
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function doubleRotate(root, dir) {
|
||||
root.setChild(!dir, singleRotate(root.getChild(!dir), !dir));
|
||||
return singleRotate(root, dir);
|
||||
}
|
||||
|
||||
const { console } = globalThis;
|
||||
|
||||
// Timeout values > TIMEOUT_MAX are set to 1.
|
||||
const TIMEOUT_MAX = 2 ** 31 - 1;
|
||||
|
||||
let globalTimeoutDue = null;
|
||||
|
||||
let nextTimerId = 1;
|
||||
const idMap = new Map();
|
||||
const dueTree = new RBTree((a, b) => a.due - b.due);
|
||||
|
||||
function clearGlobalTimeout() {
|
||||
globalTimeoutDue = null;
|
||||
opStopGlobalTimer();
|
||||
}
|
||||
|
||||
let pendingEvents = 0;
|
||||
const pendingFireTimers = [];
|
||||
|
||||
/** Process and run a single ready timer macrotask.
|
||||
* This function should be registered through Deno.core.setMacrotaskCallback.
|
||||
* Returns true when all ready macrotasks have been processed, false if more
|
||||
* ready ones are available. The Isolate future would rely on the return value
|
||||
* to repeatedly invoke this function until depletion. Multiple invocations
|
||||
* of this function one at a time ensures newly ready microtasks are processed
|
||||
* before next macrotask timer callback is invoked. */
|
||||
function handleTimerMacrotask() {
|
||||
if (pendingFireTimers.length > 0) {
|
||||
fire(ArrayPrototypeShift(pendingFireTimers));
|
||||
return pendingFireTimers.length === 0;
|
||||
if (timerTasks.length === 0) {
|
||||
return true;
|
||||
}
|
||||
return true;
|
||||
|
||||
const task = ArrayPrototypeShift(timerTasks);
|
||||
|
||||
timerNestingLevel = task.nestingLevel;
|
||||
|
||||
try {
|
||||
task.action();
|
||||
} finally {
|
||||
timerNestingLevel = 0;
|
||||
}
|
||||
return timerTasks.length === 0;
|
||||
}
|
||||
|
||||
async function setGlobalTimeout(due, now) {
|
||||
// Since JS and Rust don't use the same clock, pass the time to rust as a
|
||||
// relative time value. On the Rust side we'll turn that into an absolute
|
||||
// value again.
|
||||
const timeout = due - now;
|
||||
assert(timeout >= 0);
|
||||
// Send message to the backend.
|
||||
globalTimeoutDue = due;
|
||||
pendingEvents++;
|
||||
// FIXME(bartlomieju): this is problematic, because `clearGlobalTimeout`
|
||||
// is synchronous. That means that timer is cancelled, but this promise is still pending
|
||||
// until next turn of event loop. This leads to "leaking of async ops" in tests;
|
||||
// because `clearTimeout/clearInterval` might be the last statement in test function
|
||||
// `opSanitizer` will immediately complain that there is pending op going on, unless
|
||||
// some timeout/defer is put in place to allow promise resolution.
|
||||
// Ideally `clearGlobalTimeout` doesn't return until this op is resolved, but
|
||||
// I'm not if that's possible.
|
||||
opStartGlobalTimer(timeout);
|
||||
await opWaitGlobalTimer();
|
||||
pendingEvents--;
|
||||
prepareReadyTimers();
|
||||
}
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
function prepareReadyTimers() {
|
||||
const now = DateNow();
|
||||
// Bail out if we're not expecting the global timer to fire.
|
||||
if (globalTimeoutDue === null || pendingEvents > 0) {
|
||||
return;
|
||||
}
|
||||
// After firing the timers that are due now, this will hold the first timer
|
||||
// list that hasn't fired yet.
|
||||
let nextDueNode;
|
||||
while ((nextDueNode = dueTree.min()) !== null && nextDueNode.due <= now) {
|
||||
dueTree.remove(nextDueNode);
|
||||
// Fire all the timers in the list.
|
||||
for (const timer of nextDueNode.timers) {
|
||||
// With the list dropped, the timer is no longer scheduled.
|
||||
timer.scheduled = false;
|
||||
// Place the callback to pending timers to fire.
|
||||
ArrayPrototypePush(pendingFireTimers, timer);
|
||||
}
|
||||
}
|
||||
setOrClearGlobalTimeout(nextDueNode && nextDueNode.due, now);
|
||||
}
|
||||
/**
|
||||
* The keys in this map correspond to the key ID's in the spec's map of active
|
||||
* timers. The values are the timeout's cancel rid.
|
||||
*
|
||||
* @type {Map<number, number>}
|
||||
*/
|
||||
const activeTimers = new Map();
|
||||
|
||||
function setOrClearGlobalTimeout(due, now) {
|
||||
if (due == null) {
|
||||
clearGlobalTimeout();
|
||||
let nextId = 1;
|
||||
|
||||
/**
|
||||
* @param {Function | string} callback
|
||||
* @param {number} timeout
|
||||
* @param {Array<any>} args
|
||||
* @param {boolean} repeat
|
||||
* @param {number | undefined} prevId
|
||||
* @returns {number} The timer ID
|
||||
*/
|
||||
function initializeTimer(
|
||||
callback,
|
||||
timeout,
|
||||
args,
|
||||
repeat,
|
||||
prevId,
|
||||
) {
|
||||
// 2. If previousId was given, let id be previousId; otherwise, let
|
||||
// previousId be an implementation-defined integer than is greater than zero
|
||||
// and does not already exist in global's map of active timers.
|
||||
let id;
|
||||
let cancelRid;
|
||||
if (prevId !== undefined) {
|
||||
// `prevId` is only passed for follow-up calls on intervals
|
||||
assert(repeat);
|
||||
id = prevId;
|
||||
cancelRid = MapPrototypeGet(activeTimers, id);
|
||||
} else {
|
||||
setGlobalTimeout(due, now);
|
||||
// TODO(@andreubotella): Deal with overflow.
|
||||
// https://github.com/whatwg/html/issues/7358
|
||||
id = nextId++;
|
||||
cancelRid = core.opSync("op_timer_handle");
|
||||
|
||||
// Step 4 in "run steps after a timeout".
|
||||
MapPrototypeSet(activeTimers, id, cancelRid);
|
||||
}
|
||||
|
||||
// 3. If the surrounding agent's event loop's currently running task is a
|
||||
// task that was created by this algorithm, then let nesting level be the
|
||||
// task's timer nesting level. Otherwise, let nesting level be zero.
|
||||
// 4. If timeout is less than 0, then set timeout to 0.
|
||||
// 5. If nesting level is greater than 5, and timeout is less than 4, then
|
||||
// set timeout to 4.
|
||||
//
|
||||
// The nesting level of 5 and minimum of 4 ms are spec-mandated magic
|
||||
// constants.
|
||||
if (timeout < 0) timeout = 0;
|
||||
if (timerNestingLevel > 5 && timeout < 4) timeout = 4;
|
||||
|
||||
// 9. Let task be a task that runs the following steps:
|
||||
const task = {
|
||||
action: () => {
|
||||
// 1. If id does not exist in global's map of active timers, then abort
|
||||
// these steps.
|
||||
//
|
||||
// This is relevant if the timer has been canceled after the sleep op
|
||||
// resolves but before this task runs.
|
||||
if (!MapPrototypeHas(activeTimers, id)) {
|
||||
return;
|
||||
}
|
||||
|
||||
// 2.
|
||||
// 3.
|
||||
// TODO(@andreubotella): Error handling.
|
||||
if (typeof callback === "function") {
|
||||
FunctionPrototypeCall(callback, globalThis, ...args);
|
||||
} else {
|
||||
// TODO(@andreubotella): eval doesn't seem to have a primordial, but
|
||||
// it can be redefined in the global scope.
|
||||
(0, eval)(callback);
|
||||
}
|
||||
|
||||
if (repeat) {
|
||||
if (MapPrototypeHas(activeTimers, id)) {
|
||||
// 4. If id does not exist in global's map of active timers, then
|
||||
// abort these steps.
|
||||
// NOTE: If might have been removed via the author code in handler
|
||||
// calling clearTimeout() or clearInterval().
|
||||
// 5. If repeat is true, then perform the timer initialization steps
|
||||
// again, given global, handler, timeout, arguments, true, and id.
|
||||
initializeTimer(callback, timeout, args, true, id);
|
||||
}
|
||||
} else {
|
||||
// 6. Otherwise, remove global's map of active timers[id].
|
||||
core.tryClose(cancelRid);
|
||||
MapPrototypeDelete(activeTimers, id);
|
||||
}
|
||||
},
|
||||
|
||||
// 10. Increment nesting level by one.
|
||||
// 11. Set task's timer nesting level to nesting level.
|
||||
nestingLevel: timerNestingLevel + 1,
|
||||
};
|
||||
|
||||
// 12. Let completionStep be an algorithm step which queues a global task on
|
||||
// the timer task source given global to run task.
|
||||
// 13. Run steps after a timeout given global, "setTimeout/setInterval",
|
||||
// timeout, completionStep, and id.
|
||||
runAfterTimeout(
|
||||
() => ArrayPrototypePush(timerTasks, task),
|
||||
timeout,
|
||||
cancelRid,
|
||||
);
|
||||
|
||||
return id;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* @typedef ScheduledTimer
|
||||
* @property {number} millis
|
||||
* @property {() => void} cb
|
||||
* @property {boolean} resolved
|
||||
* @property {ScheduledTimer | null} prev
|
||||
* @property {ScheduledTimer | null} next
|
||||
*/
|
||||
|
||||
/**
|
||||
* A doubly linked list of timers.
|
||||
* @type { { head: ScheduledTimer | null, tail: ScheduledTimer | null } }
|
||||
*/
|
||||
const scheduledTimers = { head: null, tail: null };
|
||||
|
||||
/**
|
||||
* @param {() => void} cb Will be run after the timeout, if it hasn't been
|
||||
* cancelled.
|
||||
* @param {number} millis
|
||||
* @param {number} cancelRid
|
||||
*/
|
||||
function runAfterTimeout(cb, millis, cancelRid) {
|
||||
/** @type {ScheduledTimer} */
|
||||
const timerObject = {
|
||||
millis,
|
||||
cb,
|
||||
resolved: false,
|
||||
prev: scheduledTimers.tail,
|
||||
next: null,
|
||||
};
|
||||
|
||||
// Add timerObject to the end of the list.
|
||||
if (scheduledTimers.tail === null) {
|
||||
assert(scheduledTimers.head === null);
|
||||
scheduledTimers.head = scheduledTimers.tail = timerObject;
|
||||
} else {
|
||||
scheduledTimers.tail.next = timerObject;
|
||||
scheduledTimers.tail = timerObject;
|
||||
}
|
||||
|
||||
// 1.
|
||||
PromisePrototypeThen(
|
||||
core.opAsync("op_sleep", millis, cancelRid),
|
||||
() => {
|
||||
// 2. Wait until any invocations of this algorithm that had the same
|
||||
// global and orderingIdentifier, that started before this one, and
|
||||
// whose milliseconds is equal to or less than this one's, have
|
||||
// completed.
|
||||
// 4. Perform completionSteps.
|
||||
|
||||
// IMPORTANT: Since the sleep ops aren't guaranteed to resolve in the
|
||||
// right order, whenever one resolves, we run through the scheduled
|
||||
// timers list (which is in the order in which they were scheduled), and
|
||||
// we call the callback for every timer which both:
|
||||
// a) has resolved, and
|
||||
// b) its timeout is lower than the lowest unresolved timeout found so
|
||||
// far in the list.
|
||||
|
||||
timerObject.resolved = true;
|
||||
|
||||
let lowestUnresolvedTimeout = NumberPOSITIVE_INFINITY;
|
||||
|
||||
let currentEntry = scheduledTimers.head;
|
||||
while (currentEntry !== null) {
|
||||
if (currentEntry.millis < lowestUnresolvedTimeout) {
|
||||
if (currentEntry.resolved) {
|
||||
currentEntry.cb();
|
||||
removeFromScheduledTimers(currentEntry);
|
||||
} else {
|
||||
lowestUnresolvedTimeout = currentEntry.millis;
|
||||
}
|
||||
}
|
||||
|
||||
currentEntry = currentEntry.next;
|
||||
}
|
||||
},
|
||||
(err) => {
|
||||
if (err instanceof core.Interrupted) {
|
||||
// The timer was cancelled.
|
||||
removeFromScheduledTimers(timerObject);
|
||||
} else {
|
||||
throw err;
|
||||
}
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
/** @param {ScheduledTimer} timerObj */
|
||||
function removeFromScheduledTimers(timerObj) {
|
||||
if (timerObj.prev !== null) {
|
||||
timerObj.prev.next = timerObj.next;
|
||||
} else {
|
||||
assert(scheduledTimers.head === timerObj);
|
||||
scheduledTimers.head = timerObj.next;
|
||||
}
|
||||
if (timerObj.next !== null) {
|
||||
timerObj.next.prev = timerObj.prev;
|
||||
} else {
|
||||
assert(scheduledTimers.tail === timerObj);
|
||||
scheduledTimers.tail = timerObj.prev;
|
||||
}
|
||||
}
|
||||
|
||||
function schedule(timer, now) {
|
||||
assert(!timer.scheduled);
|
||||
assert(now <= timer.due);
|
||||
// Find or create the list of timers that will fire at point-in-time `due`.
|
||||
const maybeNewDueNode = { due: timer.due, timers: [] };
|
||||
let dueNode = dueTree.find(maybeNewDueNode);
|
||||
if (dueNode === null) {
|
||||
dueTree.insert(maybeNewDueNode);
|
||||
dueNode = maybeNewDueNode;
|
||||
}
|
||||
// Append the newly scheduled timer to the list and mark it as scheduled.
|
||||
ArrayPrototypePush(dueNode.timers, timer);
|
||||
timer.scheduled = true;
|
||||
// If the new timer is scheduled to fire before any timer that existed before,
|
||||
// update the global timeout to reflect this.
|
||||
if (globalTimeoutDue === null || globalTimeoutDue > timer.due) {
|
||||
setOrClearGlobalTimeout(timer.due, now);
|
||||
}
|
||||
}
|
||||
|
||||
function unschedule(timer) {
|
||||
// Check if our timer is pending scheduling or pending firing.
|
||||
// If either is true, they are not in tree, and their idMap entry
|
||||
// will be deleted soon. Remove it from queue.
|
||||
let index = -1;
|
||||
if ((index = ArrayPrototypeIndexOf(pendingFireTimers, timer)) >= 0) {
|
||||
ArrayPrototypeSplice(pendingFireTimers, index);
|
||||
return;
|
||||
}
|
||||
// If timer is not in the 2 pending queues and is unscheduled,
|
||||
// it is not in the tree.
|
||||
if (!timer.scheduled) {
|
||||
return;
|
||||
}
|
||||
const searchKey = { due: timer.due, timers: [] };
|
||||
// Find the list of timers that will fire at point-in-time `due`.
|
||||
const list = dueTree.find(searchKey).timers;
|
||||
if (list.length === 1) {
|
||||
// Time timer is the only one in the list. Remove the entire list.
|
||||
assert(list[0] === timer);
|
||||
dueTree.remove(searchKey);
|
||||
// If the unscheduled timer was 'next up', find when the next timer that
|
||||
// still exists is due, and update the global alarm accordingly.
|
||||
if (timer.due === globalTimeoutDue) {
|
||||
const nextDueNode = dueTree.min();
|
||||
setOrClearGlobalTimeout(
|
||||
nextDueNode && nextDueNode.due,
|
||||
DateNow(),
|
||||
);
|
||||
}
|
||||
} else {
|
||||
// Multiple timers that are due at the same point in time.
|
||||
// Remove this timer from the list.
|
||||
const index = ArrayPrototypeIndexOf(list, timer);
|
||||
assert(index > -1);
|
||||
ArrayPrototypeSplice(list, index, 1);
|
||||
}
|
||||
}
|
||||
|
||||
function fire(timer) {
|
||||
// If the timer isn't found in the ID map, that means it has been cancelled
|
||||
// between the timer firing and the promise callback (this function).
|
||||
if (!MapPrototypeHas(idMap, timer.id)) {
|
||||
return;
|
||||
}
|
||||
// Reschedule the timer if it is a repeating one, otherwise drop it.
|
||||
if (!timer.repeat) {
|
||||
// One-shot timer: remove the timer from this id-to-timer map.
|
||||
MapPrototypeDelete(idMap, timer.id);
|
||||
} else {
|
||||
// Interval timer: compute when timer was supposed to fire next.
|
||||
// However make sure to never schedule the next interval in the past.
|
||||
const now = DateNow();
|
||||
timer.due = MathMax(now, timer.due + timer.delay);
|
||||
schedule(timer, now);
|
||||
}
|
||||
// Call the user callback. Intermediate assignment is to avoid leaking `this`
|
||||
// to it, while also keeping the stack trace neat when it shows up in there.
|
||||
const callback = timer.callback;
|
||||
if ("function" === typeof callback) {
|
||||
callback();
|
||||
} else {
|
||||
(0, eval)(callback);
|
||||
}
|
||||
}
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
function checkThis(thisArg) {
|
||||
if (thisArg !== null && thisArg !== undefined && thisArg !== globalThis) {
|
||||
|
|
@ -486,109 +311,47 @@
|
|||
}
|
||||
}
|
||||
|
||||
function setTimer(
|
||||
cb,
|
||||
delay,
|
||||
args,
|
||||
repeat,
|
||||
) {
|
||||
// If the callack is a function, bind `args` to the callback and bind `this` to globalThis(global).
|
||||
// otherwise call `String` on it, and `eval` it on calls; do not pass variardic args to the string
|
||||
let callback;
|
||||
|
||||
if ("function" === typeof cb) {
|
||||
callback = FunctionPrototypeBind(cb, globalThis, ...args);
|
||||
} else {
|
||||
callback = String(cb);
|
||||
args = []; // args are ignored
|
||||
}
|
||||
// In the browser, the delay value must be coercible to an integer between 0
|
||||
// and INT32_MAX. Any other value will cause the timer to fire immediately.
|
||||
// We emulate this behavior.
|
||||
const now = DateNow();
|
||||
if (delay > TIMEOUT_MAX) {
|
||||
console.warn(
|
||||
`${delay} does not fit into` +
|
||||
" a 32-bit signed integer." +
|
||||
"\nTimeout duration was set to 1.",
|
||||
);
|
||||
delay = 1;
|
||||
}
|
||||
delay = MathMax(0, delay | 0);
|
||||
|
||||
// Create a new, unscheduled timer object.
|
||||
const timer = {
|
||||
id: nextTimerId++,
|
||||
callback,
|
||||
args,
|
||||
delay,
|
||||
due: now + delay,
|
||||
repeat,
|
||||
scheduled: false,
|
||||
};
|
||||
// Register the timer's existence in the id-to-timer map.
|
||||
MapPrototypeSet(idMap, timer.id, timer);
|
||||
// Schedule the timer in the due table.
|
||||
schedule(timer, now);
|
||||
return timer.id;
|
||||
}
|
||||
|
||||
function setTimeout(
|
||||
cb,
|
||||
delay = 0,
|
||||
...args
|
||||
) {
|
||||
delay >>>= 0;
|
||||
function setTimeout(callback, timeout = 0, ...args) {
|
||||
checkThis(this);
|
||||
return setTimer(cb, delay, args, false);
|
||||
}
|
||||
|
||||
function setInterval(
|
||||
cb,
|
||||
delay = 0,
|
||||
...args
|
||||
) {
|
||||
delay >>>= 0;
|
||||
checkThis(this);
|
||||
return setTimer(cb, delay, args, true);
|
||||
}
|
||||
|
||||
function clearTimer(id) {
|
||||
id >>>= 0;
|
||||
const timer = MapPrototypeGet(idMap, id);
|
||||
if (timer === undefined) {
|
||||
// Timer doesn't exist any more or never existed. This is not an error.
|
||||
return;
|
||||
if (typeof callback !== "function") {
|
||||
callback = webidl.converters.DOMString(callback);
|
||||
}
|
||||
// Unschedule the timer if it is currently scheduled, and forget about it.
|
||||
unschedule(timer);
|
||||
MapPrototypeDelete(idMap, timer.id);
|
||||
timeout = webidl.converters.long(timeout);
|
||||
|
||||
return initializeTimer(callback, timeout, args, false);
|
||||
}
|
||||
|
||||
function setInterval(callback, timeout = 0, ...args) {
|
||||
checkThis(this);
|
||||
if (typeof callback !== "function") {
|
||||
callback = webidl.converters.DOMString(callback);
|
||||
}
|
||||
timeout = webidl.converters.long(timeout);
|
||||
|
||||
return initializeTimer(callback, timeout, args, true);
|
||||
}
|
||||
|
||||
function clearTimeout(id = 0) {
|
||||
id >>>= 0;
|
||||
if (id === 0) {
|
||||
return;
|
||||
checkThis(this);
|
||||
id = webidl.converters.long(id);
|
||||
const cancelHandle = MapPrototypeGet(activeTimers, id);
|
||||
if (cancelHandle !== undefined) {
|
||||
core.tryClose(cancelHandle);
|
||||
MapPrototypeDelete(activeTimers, id);
|
||||
}
|
||||
clearTimer(id);
|
||||
}
|
||||
|
||||
function clearInterval(id = 0) {
|
||||
id >>>= 0;
|
||||
if (id === 0) {
|
||||
return;
|
||||
}
|
||||
clearTimer(id);
|
||||
checkThis(this);
|
||||
clearTimeout(id);
|
||||
}
|
||||
|
||||
window.__bootstrap.timers = {
|
||||
clearInterval,
|
||||
setTimeout,
|
||||
setInterval,
|
||||
clearTimeout,
|
||||
setTimeout,
|
||||
clearInterval,
|
||||
handleTimerMacrotask,
|
||||
opStopGlobalTimer,
|
||||
opStartGlobalTimer,
|
||||
opNow,
|
||||
sleepSync,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -1,28 +1,20 @@
|
|||
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
|
||||
|
||||
//! This module helps deno implement timers.
|
||||
//!
|
||||
//! As an optimization, we want to avoid an expensive calls into rust for every
|
||||
//! setTimeout in JavaScript. Thus in //js/timers.ts a data structure is
|
||||
//! implemented that calls into Rust for only the smallest timeout. Thus we
|
||||
//! only need to be able to start, cancel and await a single timer (or Delay, as Tokio
|
||||
//! calls it) for an entire Isolate. This is what is implemented here.
|
||||
//! This module helps deno implement timers and performance APIs.
|
||||
|
||||
use deno_core::error::AnyError;
|
||||
use deno_core::futures;
|
||||
use deno_core::futures::channel::oneshot;
|
||||
use deno_core::futures::FutureExt;
|
||||
use deno_core::futures::TryFutureExt;
|
||||
use deno_core::include_js_files;
|
||||
use deno_core::op_async;
|
||||
use deno_core::op_sync;
|
||||
use deno_core::CancelFuture;
|
||||
use deno_core::CancelHandle;
|
||||
use deno_core::Extension;
|
||||
use deno_core::OpState;
|
||||
use deno_core::Resource;
|
||||
use deno_core::ResourceId;
|
||||
use std::borrow::Cow;
|
||||
use std::cell::RefCell;
|
||||
use std::future::Future;
|
||||
use std::pin::Pin;
|
||||
use std::rc::Rc;
|
||||
use std::thread::sleep;
|
||||
use std::time::Duration;
|
||||
use std::time::Instant;
|
||||
|
||||
|
|
@ -39,14 +31,12 @@ pub fn init<P: TimersPermission + 'static>() -> Extension {
|
|||
"02_performance.js",
|
||||
))
|
||||
.ops(vec![
|
||||
("op_global_timer_stop", op_sync(op_global_timer_stop)),
|
||||
("op_global_timer_start", op_sync(op_global_timer_start)),
|
||||
("op_global_timer", op_async(op_global_timer)),
|
||||
("op_now", op_sync(op_now::<P>)),
|
||||
("op_timer_handle", op_sync(op_timer_handle)),
|
||||
("op_sleep", op_async(op_sleep)),
|
||||
("op_sleep_sync", op_sync(op_sleep_sync::<P>)),
|
||||
])
|
||||
.state(|state| {
|
||||
state.put(GlobalTimer::default());
|
||||
state.put(StartTime::now());
|
||||
Ok(())
|
||||
})
|
||||
|
|
@ -55,92 +45,6 @@ pub fn init<P: TimersPermission + 'static>() -> Extension {
|
|||
|
||||
pub type StartTime = Instant;
|
||||
|
||||
type TimerFuture = Pin<Box<dyn Future<Output = Result<(), ()>>>>;
|
||||
|
||||
#[derive(Default)]
|
||||
pub struct GlobalTimer {
|
||||
tx: Option<oneshot::Sender<()>>,
|
||||
pub future: Option<TimerFuture>,
|
||||
}
|
||||
|
||||
impl GlobalTimer {
|
||||
pub fn cancel(&mut self) {
|
||||
if let Some(tx) = self.tx.take() {
|
||||
tx.send(()).ok();
|
||||
}
|
||||
}
|
||||
|
||||
pub fn new_timeout(&mut self, deadline: Instant) {
|
||||
if self.tx.is_some() {
|
||||
self.cancel();
|
||||
}
|
||||
assert!(self.tx.is_none());
|
||||
self.future.take();
|
||||
|
||||
let (tx, rx) = oneshot::channel();
|
||||
self.tx = Some(tx);
|
||||
|
||||
let delay = tokio::time::sleep_until(deadline.into()).boxed_local();
|
||||
let rx = rx
|
||||
.map_err(|err| panic!("Unexpected error in receiving channel {:?}", err));
|
||||
|
||||
let fut = futures::future::select(delay, rx)
|
||||
.then(|_| futures::future::ok(()))
|
||||
.boxed_local();
|
||||
self.future = Some(fut);
|
||||
}
|
||||
}
|
||||
|
||||
pub fn op_global_timer_stop(
|
||||
state: &mut OpState,
|
||||
_: (),
|
||||
_: (),
|
||||
) -> Result<(), AnyError> {
|
||||
let global_timer = state.borrow_mut::<GlobalTimer>();
|
||||
global_timer.cancel();
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// Set up a timer that will be later awaited by JS promise.
|
||||
// It's a separate op, because canceling a timeout immediately
|
||||
// after setting it caused a race condition (because Tokio timeout)
|
||||
// might have been registered after next event loop tick.
|
||||
//
|
||||
// See https://github.com/denoland/deno/issues/7599 for more
|
||||
// details.
|
||||
pub fn op_global_timer_start(
|
||||
state: &mut OpState,
|
||||
timeout: u64,
|
||||
_: (),
|
||||
) -> Result<(), AnyError> {
|
||||
// According to spec, minimum allowed timeout is 4 ms.
|
||||
// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
|
||||
// TODO(#10974) Per spec this is actually a little more complicated than this.
|
||||
// The minimum timeout depends on the nesting level of the timeout.
|
||||
let timeout = std::cmp::max(timeout, 4);
|
||||
|
||||
let deadline = Instant::now() + Duration::from_millis(timeout);
|
||||
let global_timer = state.borrow_mut::<GlobalTimer>();
|
||||
global_timer.new_timeout(deadline);
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub async fn op_global_timer(
|
||||
state: Rc<RefCell<OpState>>,
|
||||
_: (),
|
||||
_: (),
|
||||
) -> Result<(), AnyError> {
|
||||
let maybe_timer_fut = {
|
||||
let mut s = state.borrow_mut();
|
||||
let global_timer = s.borrow_mut::<GlobalTimer>();
|
||||
global_timer.future.take()
|
||||
};
|
||||
if let Some(timer_fut) = maybe_timer_fut {
|
||||
let _ = timer_fut.await;
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
// Returns a milliseconds and nanoseconds subsec
|
||||
// since the start time of the deno runtime.
|
||||
// If the High precision flag is not set, the
|
||||
|
|
@ -170,6 +74,45 @@ where
|
|||
Ok(result)
|
||||
}
|
||||
|
||||
pub struct TimerHandle(Rc<CancelHandle>);
|
||||
|
||||
impl Resource for TimerHandle {
|
||||
fn name(&self) -> Cow<str> {
|
||||
"timer".into()
|
||||
}
|
||||
|
||||
fn close(self: Rc<Self>) {
|
||||
self.0.cancel();
|
||||
}
|
||||
}
|
||||
|
||||
/// Creates a [`TimerHandle`] resource that can be used to cancel invocations of
|
||||
/// [`op_sleep`].
|
||||
pub fn op_timer_handle(
|
||||
state: &mut OpState,
|
||||
_: (),
|
||||
_: (),
|
||||
) -> Result<ResourceId, AnyError> {
|
||||
let rid = state
|
||||
.resource_table
|
||||
.add(TimerHandle(CancelHandle::new_rc()));
|
||||
Ok(rid)
|
||||
}
|
||||
|
||||
/// Waits asynchronously until either `millis` milliseconds have passed or the
|
||||
/// [`TimerHandle`] resource given by `rid` has been canceled.
|
||||
pub async fn op_sleep(
|
||||
state: Rc<RefCell<OpState>>,
|
||||
millis: u64,
|
||||
rid: ResourceId,
|
||||
) -> Result<(), AnyError> {
|
||||
let handle = state.borrow().resource_table.get::<TimerHandle>(rid)?;
|
||||
tokio::time::sleep(Duration::from_millis(millis))
|
||||
.or_cancel(handle.0.clone())
|
||||
.await?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn op_sleep_sync<TP>(
|
||||
state: &mut OpState,
|
||||
millis: u64,
|
||||
|
|
@ -179,6 +122,6 @@ where
|
|||
TP: TimersPermission + 'static,
|
||||
{
|
||||
state.borrow::<TP>().check_unstable(state, "Deno.sleepSync");
|
||||
sleep(Duration::from_millis(millis));
|
||||
std::thread::sleep(Duration::from_millis(millis));
|
||||
Ok(())
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue