michael@0: /*
michael@0:  * Copyright (C) 2009 The Android Open Source Project
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: #ifndef SCOPED_FD_H_included
michael@0: #define SCOPED_FD_H_included
michael@0: 
michael@0: #include <unistd.h>
michael@0: 
michael@0: // A smart pointer that closes the given fd on going out of scope.
michael@0: // Use this when the fd is incidental to the purpose of your function,
michael@0: // but needs to be cleaned up on exit.
michael@0: class ScopedFd {
michael@0: public:
michael@0:     explicit ScopedFd(int fd) : fd(fd) {
michael@0:     }
michael@0: 
michael@0:     ~ScopedFd() {
michael@0:         close(fd);
michael@0:     }
michael@0: 
michael@0:     int get() const {
michael@0:         return fd;
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     int fd;
michael@0: 
michael@0:     // Disallow copy and assignment.
michael@0:     ScopedFd(const ScopedFd&);
michael@0:     void operator=(const ScopedFd&);
michael@0: };
michael@0: 
michael@0: #endif  // SCOPED_FD_H_included