60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
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/*
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* Copyright (C) 2009 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 SCOPED_FD_H
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#define SCOPED_FD_H
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#include <unistd.h>
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#include "bionic_macros.h"
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// A smart pointer that closes the given fd on going out of scope.
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// Use this when the fd is incidental to the purpose of your function,
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// but needs to be cleaned up on exit.
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class ScopedFd {
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public:
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explicit ScopedFd(int fd) : fd(fd) {
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}
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~ScopedFd() {
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reset();
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}
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int get() const {
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return fd;
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}
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int release() __attribute__((warn_unused_result)) {
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int localFd = fd;
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fd = -1;
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return localFd;
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}
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void reset(int new_fd = -1) {
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if (fd != -1) {
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TEMP_FAILURE_RETRY(close(fd));
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}
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fd = new_fd;
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}
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private:
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int fd;
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// Disallow copy and assignment.
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DISALLOW_COPY_AND_ASSIGN(ScopedFd);
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};
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#endif // SCOPED_FD_H
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