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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Noncopyable.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/Types.h>
#include <LibIPC/Forward.h>
namespace Core {
class AnonymousBufferImpl final : public RefCounted<AnonymousBufferImpl> {
public:
static RefPtr<AnonymousBufferImpl> create(int fd, size_t);
~AnonymousBufferImpl();
int fd() const { return m_fd; }
size_t size() const { return m_size; }
void* data() { return m_data; }
const void* data() const { return m_data; }
private:
AnonymousBufferImpl(int fd, size_t, void*);
int m_fd { -1 };
size_t m_size { 0 };
void* m_data { nullptr };
};
class AnonymousBuffer {
public:
static AnonymousBuffer create_with_size(size_t);
static AnonymousBuffer create_from_anon_fd(int fd, size_t);
AnonymousBuffer() { }
~AnonymousBuffer();
bool is_valid() const { return m_impl; }
int fd() const { return m_impl ? m_impl->fd() : -1; }
size_t size() const { return m_impl ? m_impl->size() : 0; }
template<typename T>
T* data()
{
static_assert(IsVoid<T>::value || is_trivial<T>());
if (!m_impl)
return nullptr;
return (T*)m_impl->data();
}
template<typename T>
const T* data() const
{
static_assert(IsVoid<T>::value || is_trivial<T>());
if (!m_impl)
return nullptr;
return (const T*)m_impl->data();
}
private:
explicit AnonymousBuffer(NonnullRefPtr<AnonymousBufferImpl>);
RefPtr<AnonymousBufferImpl> m_impl;
};
}
namespace IPC {
bool encode(Encoder&, const Core::AnonymousBuffer&);
bool decode(Decoder&, Core::AnonymousBuffer&);
}
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