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// Copyright 2015 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 CHROMECAST_BASE_DEVICE_CAPABILITIES_IMPL_H_
#define CHROMECAST_BASE_DEVICE_CAPABILITIES_IMPL_H_
#include "base/containers/scoped_ptr_hash_map.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list_threadsafe.h"
#include "base/synchronization/lock.h"
#include "chromecast/base/device_capabilities.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace chromecast {
class DeviceCapabilitiesImpl : public DeviceCapabilities {
public:
~DeviceCapabilitiesImpl() override;
// DeviceCapabilities implementation:
void Register(const std::string& key, Validator* validator) override;
void Unregister(const std::string& key, const Validator* validator) override;
Validator* GetValidator(const std::string& key) const override;
bool BluetoothSupported() const override;
bool DisplaySupported() const override;
scoped_ptr<base::Value> GetCapability(const std::string& path) const override;
scoped_refptr<Data> GetData() const override;
void SetCapability(const std::string& path,
scoped_ptr<base::Value> proposed_value) override;
void MergeDictionary(const base::DictionaryValue& dict_value) override;
void AddCapabilitiesObserver(Observer* observer) override;
void RemoveCapabilitiesObserver(Observer* observer) override;
private:
class ValidatorInfo : public base::SupportsWeakPtr<ValidatorInfo> {
public:
explicit ValidatorInfo(Validator* validator);
~ValidatorInfo();
Validator* validator() const { return validator_; }
scoped_refptr<base::SingleThreadTaskRunner> task_runner() const {
return task_runner_;
}
void Validate(const std::string& path,
scoped_ptr<base::Value> proposed_value) const;
private:
Validator* const validator_;
// TaskRunner of thread that validator_ was registered on
const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
DISALLOW_COPY_AND_ASSIGN(ValidatorInfo);
};
// For DeviceCapabilitiesImpl()
friend class DeviceCapabilities;
// For SetValidatedValueInternal()
friend class DeviceCapabilities::Validator;
// Map from capability key to corresponding ValidatorInfo. Gets updated
// in Register()/Unregister().
typedef base::ScopedPtrHashMap<std::string, scoped_ptr<ValidatorInfo>>
ValidatorMap;
// Internal constructor used by static DeviceCapabilities::Create*() methods.
DeviceCapabilitiesImpl();
void SetValidatedValue(const std::string& path,
scoped_ptr<base::Value> new_value) override;
// Lock for reading/writing data_ pointer
mutable base::Lock data_lock_;
// Lock for reading/writing validator_map_
mutable base::Lock validation_lock_;
scoped_refptr<Data> data_;
// TaskRunner for capability writes. All internal writes to data_ must occur
// on task_runner_for_writes_'s thread.
const scoped_refptr<base::SingleThreadTaskRunner> task_runner_for_writes_;
ValidatorMap validator_map_;
const scoped_refptr<base::ObserverListThreadSafe<Observer>> observer_list_;
DISALLOW_COPY_AND_ASSIGN(DeviceCapabilitiesImpl);
};
} // namespace chromecast
#endif // CHROMECAST_BASE_DEVICE_CAPABILITIES_IMPL_H_
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