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/*
* Copyright (C) 2016 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 LIBMEMUNREACHABLE_SCOPED_PIPE_H_
#define LIBMEMUNREACHABLE_SCOPED_PIPE_H_
#include <unistd.h>
#include "log.h"
class ScopedPipe {
public:
ScopedPipe() : pipefd_{-1, -1} {
int ret = pipe2(pipefd_, O_CLOEXEC);
if (ret < 0) {
LOG_ALWAYS_FATAL("failed to open pipe");
}
}
~ScopedPipe() {
Close();
}
ScopedPipe(ScopedPipe&& other) {
SetReceiver(other.ReleaseReceiver());
SetSender(other.ReleaseSender());
}
ScopedPipe& operator = (ScopedPipe&& other) {
SetReceiver(other.ReleaseReceiver());
SetSender(other.ReleaseSender());
return *this;
}
void CloseReceiver() {
close(ReleaseReceiver());
}
void CloseSender() {
close(ReleaseSender());
}
void Close() {
CloseReceiver();
CloseSender();
}
int Receiver() { return pipefd_[0]; }
int Sender() { return pipefd_[1]; }
int ReleaseReceiver() {
int ret = Receiver();
SetReceiver(-1);
return ret;
}
int ReleaseSender() {
int ret = Sender();
SetSender(-1);
return ret;
}
private:
void SetReceiver(int fd) { pipefd_[0] = fd; };
void SetSender(int fd) { pipefd_[1] = fd; };
int pipefd_[2];
};
#endif
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