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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Shared JavaScript code related to the heartbeat mechanism used by several
// GPU tests. Intended to be evaluated on commit in addition to whatever
// suite-specific code there is.
const HEARTBEAT_THROTTLE_MS = 5000;
class WebSocketWrapper {
constructor() {
this.queued_messages = [];
this.throttle_timer = null;
this.last_heartbeat = null;
this.socket = null;
this._sendDelayedHeartbeat = this._sendDelayedHeartbeat.bind(this);
}
setWebSocket(s) {
this.socket = s;
s.send('{"type": "CONNECTION_ACK"}');
for (let qm of this.queued_messages) {
s.send(qm);
}
}
_sendMessage(message) {
if (this.socket === null) {
this.queued_messages.push(message);
} else {
this.socket.send(message);
}
}
_sendHeartbeat() {
this._sendMessage('{"type": "TEST_HEARTBEAT"}');
}
_sendDelayedHeartbeat() {
this.throttle_timer = null;
this.last_heartbeat = +new Date();
this._sendHeartbeat();
}
sendHeartbeatThrottled() {
const now = +new Date();
// Heartbeat already scheduled.
if (this.throttle_timer !== null) {
// If we've already passed the point in time where the heartbeat should
// have been sent, cancel it and send it immediately. This helps in cases
// where we've scheduled one, but the test is doing so much work that
// the callback doesn't fire in a reasonable amount of time.
if (this.last_heartbeat !== null &&
now - this.last_heartbeat >= HEARTBEAT_THROTTLE_MS) {
this._clearPendingHeartbeat();
this.last_heartbeat = now;
this._sendHeartbeat();
}
return;
}
// Send a heartbeat immediately.
if (this.last_heartbeat === null ||
now - this.last_heartbeat >= HEARTBEAT_THROTTLE_MS){
this.last_heartbeat = now;
this._sendHeartbeat();
return;
}
// Schedule a heartbeat for the future.
this.throttle_timer = setTimeout(
this._sendDelayedHeartbeat,
HEARTBEAT_THROTTLE_MS - (now - this.last_heartbeat));
}
_clearPendingHeartbeat() {
if (this.throttle_timer !== null) {
clearTimeout(this.throttle_timer);
this.throttle_timer = null;
}
}
sendTestStarted() {
this._sendMessage('{"type": "TEST_STARTED"}');
}
sendTestFinished() {
this._clearPendingHeartbeat();
this._sendMessage('{"type": "TEST_FINISHED"}');
}
// Pixel test messages.
sendTestFinishedWithSuccessValue(success) {
this._clearPendingHeartbeat();
this._sendMessage(`{"type": "TEST_FINISHED", "success": ${success}}`);
}
sendPerformPageAction() {
this._sendMessage('{"type": "PERFORM_PAGE_ACTION"}');
}
sendTestContinue() {
this._sendMessage('{"type": "TEST_CONTINUE"}')
}
}
if (window.parent.wrapper !== undefined) {
var wrapper = window.parent.wrapper;
var inIframe = true;
window.wrapper = window.parent.wrapper;
} else {
var wrapper = new WebSocketWrapper();
var inIframe = false;
window.wrapper = wrapper;
}
function connectWebsocket(port) {
let socket = new WebSocket('ws://127.0.0.1:' + port);
socket.addEventListener('open', () => {
wrapper.setWebSocket(socket);
});
}
function wrapFunctionInHeartbeat(prototype, key) {
const old = prototype[key];
// Some functions are specific to a WebGL version, so don't try to wrap
// functions that don't exist in the current version's context prototype.
if (old === undefined) {
return;
}
prototype[key] = function (...args) {
wrapper.sendHeartbeatThrottled();
return old.call(this, ...args);
}
}
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