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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_CPP_BINDINGS_LIB_BINDINGS_INTERNAL_H_
#define MOJO_PUBLIC_CPP_BINDINGS_LIB_BINDINGS_INTERNAL_H_
#include "mojo/public/cpp/bindings/lib/template_util.h"
#include "mojo/public/cpp/bindings/struct_ptr.h"
#include "mojo/public/cpp/system/core.h"
namespace mojo {
namespace internal {
template <typename T>
class Array_Data;
#pragma pack(push, 1)
struct StructHeader {
uint32_t num_bytes;
uint32_t version;
};
static_assert(sizeof(StructHeader) == 8, "Bad sizeof(StructHeader)");
struct ArrayHeader {
uint32_t num_bytes;
uint32_t num_elements;
};
static_assert(sizeof(ArrayHeader) == 8, "Bad_sizeof(ArrayHeader)");
template <typename T>
union StructPointer {
uint64_t offset;
T* ptr;
};
static_assert(sizeof(StructPointer<char>) == 8, "Bad_sizeof(StructPointer)");
template <typename T>
union ArrayPointer {
uint64_t offset;
Array_Data<T>* ptr;
};
static_assert(sizeof(ArrayPointer<char>) == 8, "Bad_sizeof(ArrayPointer)");
union StringPointer {
uint64_t offset;
Array_Data<char>* ptr;
};
static_assert(sizeof(StringPointer) == 8, "Bad_sizeof(StringPointer)");
template <typename T>
union UnionPointer {
uint64_t offset;
T* ptr;
};
static_assert(sizeof(UnionPointer<char>) == 8, "Bad_sizeof(UnionPointer)");
struct Interface_Data {
MessagePipeHandle handle;
uint32_t version;
};
static_assert(sizeof(Interface_Data) == 8, "Bad_sizeof(Interface_Data)");
struct AssociatedInterface_Data {
uint32_t interface_id;
uint32_t version;
};
static_assert(sizeof(AssociatedInterface_Data) == 8,
"Bad_sizeof(AssociatedInterface_Data)");
using AssociatedInterfaceRequest_Data = uint32_t;
#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 H>
struct IsHandle {
enum { value = IsBaseOf<Handle, H>::value };
};
template <typename T>
struct IsUnionDataType {
template <typename U>
static YesType Test(const typename U::MojomUnionDataType*);
template <typename U>
static NoType Test(...);
static const bool value =
sizeof(Test<T>(0)) == sizeof(YesType) && !IsConst<T>::value;
};
template <typename T, bool move_only = IsMoveOnlyType<T>::value>
struct WrapperTraits;
template <typename T>
struct WrapperTraits<T, false> {
typedef T DataType;
};
template <typename H>
struct WrapperTraits<ScopedHandleBase<H>, true> {
typedef H DataType;
};
template <typename S>
struct WrapperTraits<StructPtr<S>, true> {
typedef typename S::Data_* DataType;
};
template <typename S>
struct WrapperTraits<InlinedStructPtr<S>, true> {
typedef typename S::Data_* DataType;
};
template <typename S>
struct WrapperTraits<S, true> {
typedef typename S::Data_* DataType;
};
} // namespace internal
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_BINDINGS_INTERNAL_H_
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