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// Copyright 2013 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_BINDINGS_LIB_BINDINGS_INTERNAL_H_
#define MOJO_PUBLIC_BINDINGS_LIB_BINDINGS_INTERNAL_H_
#include "mojo/public/system/core_cpp.h"
namespace mojo {
template <typename T, typename U> class TypeConverter {};
namespace internal {
template <typename T> class Array_Data;
#pragma pack(push, 1)
struct StructHeader {
uint32_t num_bytes;
uint32_t num_fields;
};
MOJO_COMPILE_ASSERT(sizeof(StructHeader) == 8, bad_sizeof_StructHeader);
struct ArrayHeader {
uint32_t num_bytes;
uint32_t num_elements;
};
MOJO_COMPILE_ASSERT(sizeof(ArrayHeader) == 8, bad_sizeof_ArrayHeader);
template <typename T>
union StructPointer {
uint64_t offset;
T* ptr;
};
MOJO_COMPILE_ASSERT(sizeof(StructPointer<char>) == 8, bad_sizeof_StructPointer);
template <typename T>
union ArrayPointer {
uint64_t offset;
Array_Data<T>* ptr;
};
MOJO_COMPILE_ASSERT(sizeof(ArrayPointer<char>) == 8, bad_sizeof_ArrayPointer);
union StringPointer {
uint64_t offset;
Array_Data<char>* ptr;
};
MOJO_COMPILE_ASSERT(sizeof(StringPointer) == 8, bad_sizeof_StringPointer);
#pragma pack(pop)
template <typename T>
void ResetIfNonNull(T* ptr) {
if (ptr)
*ptr = T();
}
template <typename T>
T FetchAndReset(T* ptr) {
T temp = *ptr;
*ptr = T();
return temp;
}
template <typename T>
class WrapperHelper {
public:
static const T Wrap(const typename T::Data* data) {
return T(typename T::Wrap(), const_cast<typename T::Data*>(data));
}
static typename T::Data* Unwrap(const T& object) {
return const_cast<typename T::Data*>(object.data_);
}
};
template <typename Data>
inline const typename Data::Wrapper Wrap(const Data* data) {
return WrapperHelper<typename Data::Wrapper>::Wrap(data);
}
template <typename T>
inline typename T::Data* Unwrap(const T& object) {
return WrapperHelper<T>::Unwrap(object);
}
template <typename T> struct TypeTraits {
static const bool kIsObject = true;
};
template <> struct TypeTraits<bool> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<char> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<int8_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<int16_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<int32_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<int64_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<uint8_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<uint16_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<uint32_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<uint64_t> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<float> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<double> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<Handle> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<DataPipeConsumerHandle> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<DataPipeProducerHandle> {
static const bool kIsObject = false;
};
template <> struct TypeTraits<MessagePipeHandle> {
static const bool kIsObject = false;
};
template <typename T> class ObjectTraits {};
} // namespace internal
} // namespace mojo
#endif // MOJO_PUBLIC_BINDINGS_LIB_BINDINGS_INTERNAL_H_
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