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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef GIN_V8_FOREGROUND_TASK_RUNNER_WITH_LOCKER_H_
#define GIN_V8_FOREGROUND_TASK_RUNNER_WITH_LOCKER_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "gin/v8_foreground_task_runner_base.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace gin {
class V8ForegroundTaskRunnerWithLocker : public V8ForegroundTaskRunnerBase {
public:
V8ForegroundTaskRunnerWithLocker(
v8::Isolate* isolate,
scoped_refptr<base::SingleThreadTaskRunner> task_runner);
~V8ForegroundTaskRunnerWithLocker() override;
// v8::Platform implementation.
bool NonNestableTasksEnabled() const override;
private:
// v8::Platform implementation.
void PostTaskImpl(std::unique_ptr<v8::Task> task,
const v8::SourceLocation& location) override;
void PostNonNestableTaskImpl(std::unique_ptr<v8::Task> task,
const v8::SourceLocation& location) override;
void PostDelayedTaskImpl(std::unique_ptr<v8::Task> task,
double delay_in_seconds,
const v8::SourceLocation& location) override;
void PostIdleTaskImpl(std::unique_ptr<v8::IdleTask> task,
const v8::SourceLocation& location) override;
// This dangles because the isolate must be disposed before the task runner
// can safely be destroyed. V8-managed tasks in other threads might try to
// post more tasks whilst the isolate is being disposed (before V8 cancels
// them as part of disposal).
//
// Once the isolate is disposed, V8 has made sure that no more tasks should be
// running or get posted, and this task runner will quickly get destroyed
// afterwards.
raw_ptr<v8::Isolate, DanglingUntriaged> isolate_;
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
};
} // namespace gin
#endif // GIN_V8_FOREGROUND_TASK_RUNNER_WITH_LOCKER_H_
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