wait-fd.h (1432B)
1/* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20#ifndef GUAC_WAIT_FD_H 21#define GUAC_WAIT_FD_H 22 23/** 24 * Waits for data to be available for reading on a given file descriptor, 25 * similar to the POSIX select() and poll() functions. 26 * 27 * @param fd 28 * The file descriptor to wait for. 29 * 30 * @param usec_timeout 31 * The maximum number of microseconds to wait for data, or -1 to 32 * potentially wait forever. 33 * 34 * @return 35 * Positive if data is available for reading, zero if the timeout elapsed 36 * and no data is available, negative if an error occurs, in which case 37 * errno will also be set. 38 */ 39int guac_wait_for_fd(int fd, int usec_timeout); 40 41#endif