184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom/* 284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Copyright (C) 2010 The Android Open Source Project 384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * 484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Licensed under the Apache License, Version 2.0 (the "License"); 584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * you may not use this file except in compliance with the License. 684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * You may obtain a copy of the License at 784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * 884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * http://www.apache.org/licenses/LICENSE-2.0 984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * 1084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Unless required by applicable law or agreed to in writing, software 1184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * distributed under the License is distributed on an "AS IS" BASIS, 1284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * See the License for the specific language governing permissions and 1484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * limitations under the License. 1584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom */ 1684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 1784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom#ifndef NET_FD_H_included 1884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom#define NET_FD_H_included 1984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 2084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom/** 2184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Wraps access to the int inside a java.io.FileDescriptor, taking care of throwing exceptions. 2284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom */ 2384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstromclass NetFd { 2484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrompublic: 2584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom NetFd(JNIEnv* env, jobject fileDescriptor) 2684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom : mEnv(env), mFileDescriptor(fileDescriptor), mFd(-1) 2784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom { 2884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } 2984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 3084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom bool isClosed() { 3184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom mFd = jniGetFDFromFileDescriptor(mEnv, mFileDescriptor); 3284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom bool closed = (mFd == -1); 3384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom if (closed) { 3484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom jniThrowException(mEnv, "java/net/SocketException", "Socket closed"); 3584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } 3684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom return closed; 3784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } 3884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 3984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom int get() const { 4084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom return mFd; 4184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } 4284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 4384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstromprivate: 4484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom JNIEnv* mEnv; 4584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom jobject mFileDescriptor; 4684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom int mFd; 4784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 4884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom // Disallow copy and assignment. 4984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom NetFd(const NetFd&); 5084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom void operator=(const NetFd&); 5184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom}; 5284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 5384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom/** 5484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Used to retry syscalls that can return EINTR. This differs from TEMP_FAILURE_RETRY in that 5584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * it also considers the case where the reason for failure is that another thread called 5684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom * Socket.close. 5784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom */ 5884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom#define NET_FAILURE_RETRY(fd, exp) ({ \ 5984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom typeof (exp) _rc; \ 6084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom do { \ 6184f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom _rc = (exp); \ 6284f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom if (_rc == -1) { \ 6384f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom if (fd.isClosed() || errno != EINTR) { \ 6484f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom break; \ 6584f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } \ 6684f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } \ 6784f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom } while (_rc == -1); \ 6884f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom _rc; }) 6984f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom 7084f161268b8ae93a9046c40ca8381aa92148f2f6Brian Carlstrom#endif // NET_FD_H_included 71