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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SYSTEM_CORE_INCLUDE_BINDERWRAPPER_BINDER_WRAPPER_H_
#define SYSTEM_CORE_INCLUDE_BINDERWRAPPER_BINDER_WRAPPER_H_
#include <sys/types.h>
#include <string>
#include <base/callback.h>
#include <utils/StrongPointer.h>
namespace android {
class BBinder;
class IBinder;
// Wraps libbinder to make it testable.
// NOTE: Static methods of this class are not thread-safe.
class BinderWrapper {
public:
virtual ~BinderWrapper() {}
// Creates and initializes the singleton (using a wrapper that communicates
// with the real binder system).
static void Create();
// Initializes |wrapper| as the singleton, taking ownership of it. Tests that
// want to inject their own wrappers should call this instead of Create().
static void InitForTesting(BinderWrapper* wrapper);
// Destroys the singleton. Must be called before calling Create() or
// InitForTesting() a second time.
static void Destroy();
// Returns the singleton instance previously created by Create() or set by
// InitForTesting().
static BinderWrapper* Get();
// Returns the singleton instance if it was previously created by Create() or
// set by InitForTesting(), or creates a new one by calling Create().
static BinderWrapper* GetOrCreateInstance();
// Gets the binder for communicating with the service identified by
// |service_name|, returning null immediately if it doesn't exist.
virtual sp<IBinder> GetService(const std::string& service_name) = 0;
// Registers |binder| as |service_name| with the service manager.
virtual bool RegisterService(const std::string& service_name,
const sp<IBinder>& binder) = 0;
// Creates a local binder object.
virtual sp<BBinder> CreateLocalBinder() = 0;
// Registers |callback| to be invoked when |binder| dies. If another callback
// is currently registered for |binder|, it will be replaced.
virtual bool RegisterForDeathNotifications(
const sp<IBinder>& binder,
const ::base::Closure& callback) = 0;
// Unregisters the callback, if any, for |binder|.
virtual bool UnregisterForDeathNotifications(const sp<IBinder>& binder) = 0;
// When called while in a transaction, returns the caller's UID or PID.
virtual uid_t GetCallingUid() = 0;
virtual pid_t GetCallingPid() = 0;
private:
static BinderWrapper* instance_;
};
} // namespace android
#endif // SYSTEM_CORE_INCLUDE_BINDERWRAPPER_BINDER_WRAPPER_H_
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