mirror of
https://github.com/LadybirdBrowser/ladybird.git
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a6e4482080
This commit makes the user-facing StdLibExtras templates and utilities arguably more nice-looking by removing the need to reach into the wrapper structs generated by them to get the value/type needed. The C++ standard library had to invent `_v` and `_t` variants (likely because of backwards compat), but we don't need to cater to any codebase except our own, so might as well have good things for free. :^)
100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Types.h>
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#include <LibIPC/Forward.h>
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namespace Core {
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class AnonymousBufferImpl final : public RefCounted<AnonymousBufferImpl> {
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public:
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static RefPtr<AnonymousBufferImpl> create(int fd, size_t);
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~AnonymousBufferImpl();
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int fd() const { return m_fd; }
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size_t size() const { return m_size; }
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void* data() { return m_data; }
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const void* data() const { return m_data; }
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private:
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AnonymousBufferImpl(int fd, size_t, void*);
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int m_fd { -1 };
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size_t m_size { 0 };
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void* m_data { nullptr };
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};
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class AnonymousBuffer {
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public:
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static AnonymousBuffer create_with_size(size_t);
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static AnonymousBuffer create_from_anon_fd(int fd, size_t);
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AnonymousBuffer() { }
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~AnonymousBuffer();
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bool is_valid() const { return m_impl; }
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int fd() const { return m_impl ? m_impl->fd() : -1; }
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size_t size() const { return m_impl ? m_impl->size() : 0; }
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template<typename T>
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T* data()
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{
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static_assert(IsVoid<T> || IsTrivial<T>);
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if (!m_impl)
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return nullptr;
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return (T*)m_impl->data();
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}
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template<typename T>
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const T* data() const
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{
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static_assert(IsVoid<T> || IsTrivial<T>);
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if (!m_impl)
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return nullptr;
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return (const T*)m_impl->data();
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}
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private:
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explicit AnonymousBuffer(NonnullRefPtr<AnonymousBufferImpl>);
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RefPtr<AnonymousBufferImpl> m_impl;
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};
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}
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namespace IPC {
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bool encode(Encoder&, const Core::AnonymousBuffer&);
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bool decode(Decoder&, Core::AnonymousBuffer&);
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}
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