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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_PUBLIC_COMMON_THREAD_SAFE_BROWSER_INTERFACE_BROKER_PROXY_H_
#define THIRD_PARTY_BLINK_PUBLIC_COMMON_THREAD_SAFE_BROWSER_INTERFACE_BROKER_PROXY_H_
#include <map>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/strings/string_piece.h"
#include "base/synchronization/lock.h"
#include "mojo/public/cpp/bindings/generic_pending_receiver.h"
#include "third_party/blink/public/common/common_export.h"
namespace blink {
// ThreadSafeBrowserInterfaceBrokerProxy provides access to interfaces exposed
// by the browser to the renderer. It is used to access process-scoped browser
// interfaces from any thread in the render process.
class BLINK_COMMON_EXPORT ThreadSafeBrowserInterfaceBrokerProxy
: public base::RefCountedThreadSafe<ThreadSafeBrowserInterfaceBrokerProxy> {
public:
ThreadSafeBrowserInterfaceBrokerProxy();
ThreadSafeBrowserInterfaceBrokerProxy(
const ThreadSafeBrowserInterfaceBrokerProxy&) = delete;
ThreadSafeBrowserInterfaceBrokerProxy& operator=(
const ThreadSafeBrowserInterfaceBrokerProxy&) = delete;
// Asks the browser to bind the given receiver. If a non-null testing override
// was set by |SetBinderForTesting()|, the request will be intercepted by that
// Binder instead of going to the browser.
void GetInterface(mojo::GenericPendingReceiver);
// Overrides how the named interface is bound, rather than sending its
// receivers to the browser. If the Binder is null, any registered override
// for the interface is cancelled.
//
// Returns |true| if the new Binder was successfully set, or |false| if the
// Binder was non-null and an existing Binder was already registered for the
// named interface.
using Binder = base::RepeatingCallback<void(mojo::ScopedMessagePipeHandle)>;
bool SetBinderForTesting(base::StringPiece interface_name, Binder);
protected:
friend class base::RefCountedThreadSafe<
ThreadSafeBrowserInterfaceBrokerProxy>;
virtual ~ThreadSafeBrowserInterfaceBrokerProxy();
virtual void GetInterfaceImpl(mojo::GenericPendingReceiver) = 0;
private:
base::Lock binder_map_lock_;
std::map<std::string, Binder> binder_map_for_testing_
GUARDED_BY(binder_map_lock_);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_PUBLIC_COMMON_THREAD_SAFE_BROWSER_INTERFACE_BROKER_PROXY_H_
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