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* 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
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
#ifndef GUAC_WAIT_FD_H
#define GUAC_WAIT_FD_H
* Waits for data to be available for reading on a given file descriptor,
* similar to the POSIX select() and poll() functions.
* @param fd
* The file descriptor to wait for.
* @param usec_timeout
* The maximum number of microseconds to wait for data, or -1 to
* potentially wait forever.
* @return
* Positive if data is available for reading, zero if the timeout elapsed
* and no data is available, negative if an error occurs, in which case
* errno will also be set.
int guac_wait_for_fd(int fd, int usec_timeout);