// Licensed to the Apache Software Foundation (ASF) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The ASF licenses this file // to you 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. // Author: Ge,Jun (gejun@baidu.com) // Date: Mon. Nov 7 14:47:36 CST 2011 #include <fcntl.h> // fcntl() #include <netinet/in.h> // IPPROTO_TCP #include <sys/types.h> #include <sys/socket.h> // setsockopt #include <netinet/tcp.h> // TCP_NODELAY namespace butil { int make_non_blocking(int fd) { const int flags = fcntl(fd, F_GETFL, 0); if (flags < 0) { return flags; } if (flags & O_NONBLOCK) { return 0; } return fcntl(fd, F_SETFL, flags | O_NONBLOCK); } int make_blocking(int fd) { const int flags = fcntl(fd, F_GETFL, 0); if (flags < 0) { return flags; } if (flags & O_NONBLOCK) { return fcntl(fd, F_SETFL, flags & ~O_NONBLOCK); } return 0; } int make_close_on_exec(int fd) { return fcntl(fd, F_SETFD, FD_CLOEXEC); } int make_no_delay(int socket) { int flag = 1; return setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char*)&flag, sizeof(flag)); } } // namespace butil