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// Copyright 2014 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_
#define MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_
#include "mojo/public/cpp/bindings/lib/bindings_internal.h"
namespace mojo {
namespace internal {
template <typename T, bool is_object_type = TypeTraits<T>::kIsObject>
struct Callback_ParamTraits {};
template <typename T>
struct Callback_ParamTraits<T, true> {
typedef const T& ForwardType;
static const bool kIsScopedHandle = false;
};
template <typename T>
struct Callback_ParamTraits<T, false> {
typedef T ForwardType;
static const bool kIsScopedHandle = false;
};
template <typename H>
struct Callback_ParamTraits<ScopedHandleBase<H>, true> {
typedef ScopedHandleBase<H> ForwardType;
static const bool kIsScopedHandle = true;
};
template<bool B, typename T = void>
struct EnableIf {};
template<typename T>
struct EnableIf<true, T> { typedef T type; };
template <typename T>
typename EnableIf<!Callback_ParamTraits<T>::kIsScopedHandle, T>::type&
Callback_Forward(T& t) {
return t;
}
template <typename T>
typename EnableIf<Callback_ParamTraits<T>::kIsScopedHandle, T>::type
Callback_Forward(T& t) {
return t.Pass();
}
} // namespace internal
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_CALLBACK_INTERNAL_H_
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