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71 lines
1.9 KiB
71 lines
1.9 KiB
/* |
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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_UNIQUEFD_H |
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#define NETUTILS_UNIQUEFD_H |
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#include <unistd.h> |
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#include <ostream> |
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#include "netdutils/Fd.h" |
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namespace android { |
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namespace netdutils { |
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// Stricter unique_fd implementation that: |
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// *) Does not implement release() |
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// *) Does not implicitly cast to int |
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// *) Uses a strongly typed wrapper (Fd) for the underlying file descriptor |
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// |
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// Users of UniqueFd should endeavor to treat this as a completely |
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// opaque object. The only code that should interpret the wrapped |
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// value is in Syscalls.h |
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class UniqueFd { |
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public: |
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UniqueFd() = default; |
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UniqueFd(Fd fd) : mFd(fd) {} |
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~UniqueFd() { reset(); } |
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// Disallow copy |
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UniqueFd(const UniqueFd&) = delete; |
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UniqueFd& operator=(const UniqueFd&) = delete; |
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// Allow move |
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UniqueFd(UniqueFd&& other) { std::swap(mFd, other.mFd); } |
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UniqueFd& operator=(UniqueFd&& other) { |
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std::swap(mFd, other.mFd); |
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return *this; |
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} |
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// Cleanup any currently owned Fd, replacing it with the optional |
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// parameter fd |
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void reset(Fd fd = Fd()); |
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// Implict cast to Fd |
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const operator Fd() const { return mFd; } |
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private: |
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Fd mFd; |
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}; |
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std::ostream& operator<<(std::ostream& os, const UniqueFd& fd); |
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} // namespace netdutils |
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} // namespace android |
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#endif /* NETUTILS_UNIQUEFD_H */
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