92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TNT_FILAMENT_FILAMENT_API_H
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#define TNT_FILAMENT_FILAMENT_API_H
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#include <utils/compiler.h>
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#include <stddef.h>
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namespace filament {
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/**
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* \privatesection
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* FilamentAPI is used to define an API in filament.
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* It ensures the class defining the API can't be created, destroyed
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* or copied by the caller.
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*/
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class UTILS_PUBLIC FilamentAPI {
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protected:
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// disallow creation on the stack
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FilamentAPI() noexcept = default;
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~FilamentAPI() = default;
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public:
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// disallow copy and assignment
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FilamentAPI(FilamentAPI const&) = delete;
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FilamentAPI(FilamentAPI&&) = delete;
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FilamentAPI& operator=(FilamentAPI const&) = delete;
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FilamentAPI& operator=(FilamentAPI&&) = delete;
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// allow placement-new allocation, don't use "noexcept", to avoid compiler null check
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static void *operator new (size_t, void* p) { return p; }
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// prevent heap allocation
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static void *operator new (size_t) = delete;
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static void *operator new[] (size_t) = delete;
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static void operator delete (void*) = delete;
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static void operator delete[](void*) = delete;
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};
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/**
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* \privatesection
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* BuilderBase is used to hide the implementation details of builders and ensure a higher
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* level of backward binary compatibility.
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* The actual implementation is in src/FilamentAPI-impl.h"
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*/
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template <typename T>
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class BuilderBase {
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public:
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// none of these methods must be implemented inline because it's important that their
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// implementation be hidden from the public headers.
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template<typename ... ARGS>
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explicit BuilderBase(ARGS&& ...) noexcept;
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BuilderBase() noexcept;
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~BuilderBase() noexcept;
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BuilderBase(BuilderBase const& rhs) noexcept;
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BuilderBase& operator = (BuilderBase const& rhs) noexcept;
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// move ctor and copy operator can be implemented inline and don't need to be exported
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BuilderBase(BuilderBase&& rhs) noexcept : mImpl(rhs.mImpl) { rhs.mImpl = nullptr; }
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BuilderBase& operator = (BuilderBase&& rhs) noexcept {
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auto temp = mImpl;
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mImpl = rhs.mImpl;
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rhs.mImpl = temp;
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return *this;
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}
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protected:
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T* mImpl;
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inline T* operator->() noexcept { return mImpl; }
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inline T const* operator->() const noexcept { return mImpl; }
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};
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} // namespace filament
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#endif // TNT_FILAMENT_FILAMENT_API_H
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