You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
1.8 KiB
107 lines
1.8 KiB
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef ANDROID_AUTO_FD_H_
|
|
#define ANDROID_AUTO_FD_H_
|
|
|
|
#include <unistd.h>
|
|
|
|
namespace android {
|
|
|
|
class UniqueFd {
|
|
public:
|
|
UniqueFd() = default;
|
|
UniqueFd(int fd) : fd_(fd) {
|
|
}
|
|
UniqueFd(UniqueFd &&rhs) {
|
|
fd_ = rhs.fd_;
|
|
rhs.fd_ = -1;
|
|
}
|
|
|
|
UniqueFd &operator=(UniqueFd &&rhs) {
|
|
Set(rhs.Release());
|
|
return *this;
|
|
}
|
|
|
|
~UniqueFd() {
|
|
if (fd_ >= 0)
|
|
close(fd_);
|
|
}
|
|
|
|
int Release() {
|
|
int old_fd = fd_;
|
|
fd_ = -1;
|
|
return old_fd;
|
|
}
|
|
|
|
int Set(int fd) {
|
|
if (fd_ >= 0)
|
|
close(fd_);
|
|
fd_ = fd;
|
|
return fd_;
|
|
}
|
|
|
|
void Close() {
|
|
if (fd_ >= 0)
|
|
close(fd_);
|
|
fd_ = -1;
|
|
}
|
|
|
|
int get() const {
|
|
return fd_;
|
|
}
|
|
|
|
private:
|
|
int fd_ = -1;
|
|
};
|
|
|
|
struct OutputFd {
|
|
OutputFd() = default;
|
|
OutputFd(int *fd) : fd_(fd) {
|
|
}
|
|
OutputFd(OutputFd &&rhs) {
|
|
fd_ = rhs.fd_;
|
|
rhs.fd_ = NULL;
|
|
}
|
|
|
|
OutputFd &operator=(OutputFd &&rhs) {
|
|
fd_ = rhs.fd_;
|
|
rhs.fd_ = NULL;
|
|
return *this;
|
|
}
|
|
|
|
int Set(int fd) {
|
|
if (*fd_ >= 0)
|
|
close(*fd_);
|
|
*fd_ = fd;
|
|
return fd;
|
|
}
|
|
|
|
int get() {
|
|
return *fd_;
|
|
}
|
|
|
|
operator bool() const {
|
|
return fd_ != NULL;
|
|
}
|
|
|
|
private:
|
|
int *fd_ = NULL;
|
|
};
|
|
} // namespace android
|
|
|
|
#endif
|