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55 lines
1.4 KiB
55 lines
1.4 KiB
4 months ago
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/*
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* Copyright (C) 2017 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 NETUTILS_FD_H
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#define NETUTILS_FD_H
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#include <ostream>
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#include "netdutils/Status.h"
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namespace android {
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namespace netdutils {
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// Strongly typed wrapper for file descriptors with value semantics.
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// This class should typically hold unowned file descriptors.
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class Fd {
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public:
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constexpr Fd() = default;
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constexpr Fd(int fd) : mFd(fd) {}
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int get() const { return mFd; }
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bool operator==(const Fd& other) const { return get() == other.get(); }
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bool operator!=(const Fd& other) const { return get() != other.get(); }
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private:
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int mFd = -1;
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};
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// Return true if fd appears valid (non-negative)
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inline bool isWellFormed(const Fd fd) {
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return fd.get() >= 0;
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}
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std::ostream& operator<<(std::ostream& os, const Fd& fd);
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} // namespace netdutils
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} // namespace android
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#endif /* NETUTILS_FD_H */
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