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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SCHEDULER_BROWSER_IO_THREAD_DELEGATE_H_
#define CONTENT_BROWSER_SCHEDULER_BROWSER_IO_THREAD_DELEGATE_H_
#include "base/memory/ptr_util.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/scoped_refptr.h"
#include "base/task/sequence_manager/task_queue.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "content/browser/scheduler/browser_task_queues.h"
#include "content/common/content_export.h"
namespace base {
class SingleThreadTaskRunner;
namespace sequence_manager {
class SequenceManager;
} // namespace sequence_manager
} // namespace base
namespace content {
// Delegate for the IO thread.
class CONTENT_EXPORT BrowserIOThreadDelegate : public base::Thread::Delegate {
public:
using Handle = BrowserTaskQueues::Handle;
// Creates a BrowserIOThreadDelegate for use with a real IO thread.
BrowserIOThreadDelegate();
~BrowserIOThreadDelegate() override;
static std::unique_ptr<BrowserIOThreadDelegate> CreateForTesting(
base::sequence_manager::SequenceManager* sequence_manager) {
DCHECK(sequence_manager);
return base::WrapUnique(new BrowserIOThreadDelegate(sequence_manager));
}
scoped_refptr<base::SingleThreadTaskRunner> GetDefaultTaskRunner() override;
void BindToCurrentThread() override;
bool allow_blocking_for_testing() const {
return allow_blocking_for_testing_;
}
// Call this before handing this over to a base::Thread to allow blocking in
// tests.
void SetAllowBlockingForTesting() { allow_blocking_for_testing_ = true; }
scoped_refptr<Handle> GetHandle() { return task_queues_->GetHandle(); }
private:
// Creates a sequence funneled BrowserIOThreadDelegate for use in testing.
explicit BrowserIOThreadDelegate(
base::sequence_manager::SequenceManager* sequence_manager);
// Performs the actual initialization of all the members that require a
// SequenceManager.
void Init();
bool allow_blocking_for_testing_ = false;
// Owned SequenceManager, null if instance created via CreateForTesting.
const std::unique_ptr<base::sequence_manager::SequenceManager>
owned_sequence_manager_;
const raw_ptr<base::sequence_manager::SequenceManager> sequence_manager_;
std::unique_ptr<BrowserTaskQueues> task_queues_;
scoped_refptr<base::SingleThreadTaskRunner> default_task_runner_;
};
} // namespace content
#endif // CONTENT_BROWSER_SCHEDULER_BROWSER_IO_THREAD_DELEGATE_H_
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