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Unified Diff: mojo/public/cpp/bindings/lib/bindings_internal.h

Issue 2250183003: Make the fuchsia mojo/public repo the source of truth. (Closed) Base URL: https://github.com/domokit/mojo.git@master
Patch Set: Created 4 years, 4 months ago
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Index: mojo/public/cpp/bindings/lib/bindings_internal.h
diff --git a/mojo/public/cpp/bindings/lib/bindings_internal.h b/mojo/public/cpp/bindings/lib/bindings_internal.h
deleted file mode 100644
index 7479cd1d95a5b94e16862ec001f706ea436dffda..0000000000000000000000000000000000000000
--- a/mojo/public/cpp/bindings/lib/bindings_internal.h
+++ /dev/null
@@ -1,281 +0,0 @@
-// 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 <type_traits>
-
-#include "mojo/public/cpp/bindings/lib/template_util.h"
-#include "mojo/public/cpp/bindings/struct_ptr.h"
-#include "mojo/public/cpp/system/handle.h"
-#include "mojo/public/cpp/system/message_pipe.h"
-
-namespace mojo {
-class String;
-
-template <typename T>
-class Array;
-
-template <typename Interface>
-class InterfaceHandle;
-
-template <typename Interface>
-class InterfaceRequest;
-
-template <typename K, typename V>
-class Map;
-
-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)");
-
-struct Interface_Data {
- MessagePipeHandle handle;
- uint32_t version;
-};
-static_assert(sizeof(Interface_Data) == 8, "Bad_sizeof(Interface_Data)");
-
-template <typename T>
-union UnionPointer {
- uint64_t offset;
- T* ptr;
-};
-static_assert(sizeof(UnionPointer<char>) == 8, "Bad_sizeof(UnionPointer)");
-
-#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 = std::is_base_of<Handle, H>::value };
-};
-
-// TODO(vardhan): Replace RemoveStructPtr<> and UnwrapStructPtr<> with
-// specializations of std::pointer_traits<> on [Inlined]StructPtr<>.
-template <typename T>
-struct RemoveStructPtr {
- typedef T type;
-};
-
-template <typename T>
-struct RemoveStructPtr<StructPtr<T>> {
- typedef T type;
-};
-
-template <typename T>
-struct RemoveStructPtr<InlinedStructPtr<T>> {
- typedef T type;
-};
-
-template <typename T>
-struct UnwrapStructPtr {
- static T* value(T& x) { return &x; }
-};
-
-template <typename T>
-struct UnwrapStructPtr<StructPtr<T>> {
- static T* value(StructPtr<T>& x) { return x.get(); }
-};
-
-template <typename T>
-struct UnwrapStructPtr<InlinedStructPtr<T>> {
- static T* value(InlinedStructPtr<T>& x) { return x.get(); }
-};
-
-template <typename T>
-struct UnwrapConstStructPtr {
- static const T* value(const T& x) { return &x; }
-};
-
-template <typename T>
-struct UnwrapConstStructPtr<StructPtr<T>> {
- static const T* value(const StructPtr<T>& x) { return x.get(); }
-};
-
-template <typename T>
-struct UnwrapConstStructPtr<InlinedStructPtr<T>> {
- static const T* value(const InlinedStructPtr<T>& x) { return x.get(); }
-};
-
-template <typename T>
-struct IsStructPtr {
- static bool const value = IsSpecializationOf<StructPtr, T>::value ||
- IsSpecializationOf<InlinedStructPtr, T>::value;
-};
-
-template <typename T>
-struct IsUnionWrapperType {
- template <typename U>
- static YesType Test(const typename U::Data_::MojomUnionDataType*);
-
- template <typename U>
- static NoType Test(...);
-
- static const bool value =
- sizeof(Test<T>(0)) == sizeof(YesType) && !std::is_const<T>::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) && !std::is_const<T>::value;
-};
-
-// To introduce a new mojom type, you must define (partial or full) template
-// specializations for the following traits templates, which operate on the C++
-// wrapper types representing a mojom type:
-// - WrapperTraits: provides a |DataType| typedef which points to the
-// serialized data type.
-// - ValueTraits: provides an |Equals()| method for comparing the two wrapper
-// values of the same type.
-//
-// Currently, full specializations of WrapperTraits are generated for mojo
-// structs in their generated `.mojom.h`. In contrast, WrapperTraits for Unions
-// don't need to be auto-generated because their underlying DataType can be
-// accessed without dependency issues -- a catch-all WrapperTraits for unions is
-// instead defined here.
-// TODO(vardhan): Merge ValueTraits and WrapperTraits into one?
-// TODO(vardhan): Write a doc about all the Traits templates you need to touch
-// when introducing a new mojom type.
-// TODO(vardhan): Instead of providing |move_only| & |is_union| template
-// parameters, provide a default "typename Enable = void" template parameter,
-// and have specializations define their own Enable expressions (similar to how
-// ValueTraits is).
-template <typename T,
- bool move_only = IsMoveOnlyType<T>::value,
- bool is_union =
- IsUnionWrapperType<typename RemoveStructPtr<T>::type>::value>
-struct WrapperTraits;
-
-// Catch-all for all mojom types not specialized below.
-template <typename T>
-struct WrapperTraits<T, false, false> {
- using DataType = T;
-};
-template <typename H>
-struct WrapperTraits<ScopedHandleBase<H>, true, false> {
- using DataType = H;
-};
-template <typename I>
-struct WrapperTraits<InterfaceRequest<I>, true, false> {
- using DataType = MessagePipeHandle;
-};
-template <typename Interface>
-struct WrapperTraits<InterfaceHandle<Interface>, true, false> {
- using DataType = Interface_Data;
-};
-// Unions.
-template <typename U>
-struct WrapperTraits<StructPtr<U>, true, true> {
- using DataType = typename U::Data_;
-};
-template <typename U>
-struct WrapperTraits<InlinedStructPtr<U>, true, true> {
- using DataType = typename U::Data_;
-};
-// Catch-all for other pointer types: arrays, maps.
-template <typename S>
-struct WrapperTraits<S, true, false> {
- using DataType = typename S::Data_*;
-};
-
-template <typename T, typename Enable = void>
-struct ValueTraits {
- static bool Equals(const T& a, const T& b) { return a == b; }
-};
-
-template <typename T>
-struct ValueTraits<T,
- typename std::enable_if<
- IsSpecializationOf<Array, T>::value ||
- IsSpecializationOf<Map, T>::value ||
- IsSpecializationOf<StructPtr, T>::value ||
- IsSpecializationOf<InlinedStructPtr, T>::value>::type> {
- static bool Equals(const T& a, const T& b) { return a.Equals(b); }
-};
-
-template <typename T>
-struct ValueTraits<ScopedHandleBase<T>> {
- static bool Equals(const ScopedHandleBase<T>& a,
- const ScopedHandleBase<T>& b) {
- return (&a == &b) || (!a.is_valid() && !b.is_valid());
- }
-};
-
-// |InterfaceHandle|s hold message pipes uniquely, so they can only be equal if
-// they're the same object or are both "invalid".
-template <typename I>
-struct ValueTraits<InterfaceHandle<I>> {
- static bool Equals(const InterfaceHandle<I>& a, const InterfaceHandle<I>& b) {
- return (&a == &b) || (!a.is_valid() && !b.is_valid());
- }
-};
-
-// |InterfaceRequest|s hold message pipes uniquely, so they can only be equal if
-// they're the same object or are both "invalid".
-template <typename I>
-struct ValueTraits<InterfaceRequest<I>> {
- static bool Equals(const InterfaceRequest<I>& a,
- const InterfaceRequest<I>& b) {
- return (&a == &b) || (!a.is_pending() && !b.is_pending());
- }
-};
-
-} // namespace internal
-} // namespace mojo
-
-#endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_BINDINGS_INTERNAL_H_
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