2017-08-10 12:01:17 +02:00
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/*
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2018-08-20 16:34:47 +02:00
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* Copyright 2012-2018 Max Kellermann <max.kellermann@gmail.com>
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2017-08-10 12:01:17 +02:00
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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
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef UNIQUE_FILE_DESCRIPTOR_HXX
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#define UNIQUE_FILE_DESCRIPTOR_HXX
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#include "FileDescriptor.hxx"
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#include <utility>
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2018-08-20 16:38:27 +02:00
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#include <assert.h>
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2017-08-10 12:01:17 +02:00
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/**
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* An OO wrapper for a UNIX file descriptor.
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*/
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2018-08-20 16:38:27 +02:00
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class UniqueFileDescriptor : public FileDescriptor {
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public:
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2018-08-20 16:34:47 +02:00
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UniqueFileDescriptor() noexcept
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:FileDescriptor(FileDescriptor::Undefined()) {}
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2017-08-10 12:01:17 +02:00
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protected:
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2018-08-20 16:34:47 +02:00
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explicit UniqueFileDescriptor(int _fd) noexcept:FileDescriptor(_fd) {
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2017-08-10 12:01:17 +02:00
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assert(IsDefined());
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}
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public:
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2018-08-20 16:34:47 +02:00
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explicit UniqueFileDescriptor(FileDescriptor _fd) noexcept
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2017-08-10 12:01:17 +02:00
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:FileDescriptor(_fd) {}
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2018-08-20 16:38:27 +02:00
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UniqueFileDescriptor(const UniqueFileDescriptor &) = delete;
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2018-08-20 16:34:47 +02:00
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UniqueFileDescriptor(UniqueFileDescriptor &&other) noexcept
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2017-08-10 12:01:17 +02:00
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:FileDescriptor(other.Steal()) {}
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2018-08-20 16:34:47 +02:00
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~UniqueFileDescriptor() noexcept {
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Close();
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}
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2018-08-20 16:34:47 +02:00
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UniqueFileDescriptor &operator=(UniqueFileDescriptor &&other) noexcept {
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std::swap(fd, other.fd);
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return *this;
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}
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protected:
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2018-08-20 16:34:47 +02:00
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void Set(int _fd) noexcept {
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2017-08-10 12:01:17 +02:00
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assert(!IsDefined());
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assert(_fd >= 0);
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FileDescriptor::Set(_fd);
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}
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public:
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#ifndef _WIN32
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2018-08-20 16:34:47 +02:00
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static bool CreatePipe(UniqueFileDescriptor &r, UniqueFileDescriptor &w) noexcept {
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2017-08-10 12:01:17 +02:00
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return FileDescriptor::CreatePipe(r, w);
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}
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2018-08-20 16:34:47 +02:00
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static bool CreatePipe(FileDescriptor &r, FileDescriptor &w) noexcept;
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2017-08-10 12:01:17 +02:00
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#endif
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2018-08-20 16:34:47 +02:00
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bool Close() noexcept {
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2017-08-10 12:01:17 +02:00
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return IsDefined() && FileDescriptor::Close();
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}
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};
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#endif
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