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/*
* Copyright (C) 2010-2020 Apple Inc. All rights reserved.
* Copyright (C) 2017 Sony Interactive Entertainment Inc.
*
* 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 <optional>
#if OS(DARWIN) && !USE(UNIX_DOMAIN_SOCKETS)
#include <mach/mach_init.h>
#include <mach/mach_traps.h>
#include <wtf/MachSendRight.h>
#endif
#if OS(WINDOWS)
#include <windows.h>
#endif
#if USE(UNIX_DOMAIN_SOCKETS)
#include <variant>
#include <wtf/Function.h>
#include <wtf/unix/UnixFileDescriptor.h>
#endif
namespace IPC {
class Decoder;
class Encoder;
#if OS(DARWIN)
class Attachment : public MachSendRight {
#else
class Attachment {
#endif
public:
Attachment();
enum Type {
Uninitialized,
#if USE(UNIX_DOMAIN_SOCKETS)
SocketType,
MappedMemoryType,
CustomWriterType,
#elif OS(DARWIN)
MachPortType
#endif
};
#if USE(UNIX_DOMAIN_SOCKETS)
explicit Attachment(UnixFileDescriptor&&, size_t);
explicit Attachment(UnixFileDescriptor&&);
Attachment(Attachment&&);
Attachment& operator=(Attachment&&);
~Attachment();
using SocketDescriptor = int;
using CustomWriterFunc = WTF::Function<void(SocketDescriptor)>;
using CustomWriter = std::variant<CustomWriterFunc, SocketDescriptor>;
Attachment(CustomWriter&&);
#elif OS(DARWIN)
Attachment(MachSendRight&&);
Attachment(const MachSendRight&);
#elif OS(WINDOWS)
Attachment(HANDLE handle)
: m_handle(handle)
{ }
#endif
Type type() const { return m_type; }
#if USE(UNIX_DOMAIN_SOCKETS)
bool isNull() const { return !m_fd; }
size_t size() const { return m_size; }
const UnixFileDescriptor& fd() const { return m_fd; }
UnixFileDescriptor release() { return std::exchange(m_fd, UnixFileDescriptor { }); }
const CustomWriter& customWriter() const { return m_customWriter; }
#elif OS(WINDOWS)
HANDLE handle() const { return m_handle; }
#endif
void encode(Encoder&) const;
static std::optional<Attachment> decode(Decoder&);
private:
Type m_type;
#if USE(UNIX_DOMAIN_SOCKETS)
UnixFileDescriptor m_fd;
size_t m_size;
CustomWriter m_customWriter;
#elif OS(WINDOWS)
HANDLE m_handle { INVALID_HANDLE_VALUE };
#endif
};
} // namespace IPC
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