/* * Copyright (C) 2010 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 NETFD_H_ #define NETFD_H_ #include <conscrypt/jniutil.h> /** * Wraps access to the int inside a java.io.FileDescriptor, taking care of throwing exceptions. */ class NetFd { public: NetFd(JNIEnv* env, jobject fileDescriptor) : mEnv(env), mFileDescriptor(fileDescriptor), mFd(-1) {} bool isClosed() { mFd = conscrypt::jniutil::jniGetFDFromFileDescriptor(mEnv, mFileDescriptor); bool closed = (mFd == -1); if (closed) { conscrypt::jniutil::throwException(mEnv, "java/net/SocketException", "Socket closed"); } return closed; } int get() const { return mFd; } private: JNIEnv* mEnv; jobject mFileDescriptor; int mFd; // Disallow copy and assignment. NetFd(const NetFd&); void operator=(const NetFd&); }; /** * Used to retry syscalls that can return EINTR. This differs from TEMP_FAILURE_RETRY in that * it also considers the case where the reason for failure is that another thread called * Socket.close. */ #define NET_FAILURE_RETRY(fd, exp) \ ({ \ typeof(exp) _rc; \ do { \ _rc = (exp); \ if (_rc == -1) { \ if (fd.isClosed() || errno != EINTR) { \ break; \ } \ } \ } while (_rc == -1); \ _rc; \ }) #endif // NETFD_H_