mirror of https://github.com/electron/electron
39 lines
1.6 KiB
C++
Executable File
39 lines
1.6 KiB
C++
Executable File
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// Copyright (c) 2018 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/browser/microtasks_runner.h"
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#include "shell/browser/electron_browser_main_parts.h"
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#include "shell/browser/javascript_environment.h"
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#include "shell/common/node_includes.h"
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#include "v8/include/v8.h"
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namespace electron {
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MicrotasksRunner::MicrotasksRunner(v8::Isolate* isolate) : isolate_(isolate) {}
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void MicrotasksRunner::WillProcessTask(const base::PendingTask& pending_task,
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bool was_blocked_or_low_priority) {}
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void MicrotasksRunner::DidProcessTask(const base::PendingTask& pending_task) {
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v8::Isolate::Scope scope(isolate_);
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// In the browser process we follow Node.js microtask policy of kExplicit
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// and let the MicrotaskRunner which is a task observer for chromium UI thread
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// scheduler run the microtask checkpoint. This worked fine because Node.js
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// also runs microtasks through its task queue, but after
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// https://github.com/electron/electron/issues/20013 Node.js now performs its
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// own microtask checkpoint and it may happen is some situations that there is
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// contention for performing checkpoint between Node.js and chromium, ending
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// up Node.js delaying its callbacks. To fix this, now we always lets Node.js
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// handle the checkpoint in the browser process.
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{
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v8::HandleScope handle_scope(isolate_);
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node::CallbackScope microtasks_scope(isolate_, v8::Object::New(isolate_),
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{0, 0});
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}
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}
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} // namespace electron
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