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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// 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 rr_Routine_hpp
#define rr_Routine_hpp
#include <memory>
namespace rr {
class Routine
{
public:
Routine() = default;
virtual ~Routine() = default;
virtual const void *getEntry(int index = 0) const = 0;
};
// RoutineT is a type-safe wrapper around a Routine and its callable entry, returned by FunctionT
template<typename FunctionType>
class RoutineT;
template<typename Return, typename... Arguments>
class RoutineT<Return(Arguments...)>
{
public:
RoutineT() = default;
explicit RoutineT(const std::shared_ptr<Routine> &routine)
: routine(routine)
{
if(routine)
{
callable = reinterpret_cast<CallableType>(const_cast<void *>(routine->getEntry(0)));
}
}
operator bool() const
{
return callable != nullptr;
}
template<typename... Args>
Return operator()(Args &&... args) const
{
return callable(std::forward<Args>(args)...);
}
const void *getEntry() const
{
return reinterpret_cast<void *>(callable);
}
private:
std::shared_ptr<Routine> routine;
using CallableType = Return (*)(Arguments...);
CallableType callable = nullptr;
};
} // namespace rr
#endif // rr_Routine_hpp