1 /* 2 * QEMU I/O channels watch helper APIs 3 * 4 * Copyright (c) 2015 Red Hat, Inc. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 * 19 */ 20 21 #ifndef QIO_CHANNEL_WATCH_H__ 22 #define QIO_CHANNEL_WATCH_H__ 23 24 #include "io/channel.h" 25 26 /* 27 * This module provides helper functions that will be needed by 28 * the various QIOChannel implementations, for creating watches 29 * on file descriptors / sockets 30 */ 31 32 /** 33 * qio_channel_create_fd_watch: 34 * @ioc: the channel object 35 * @fd: the file descriptor 36 * @condition: the I/O condition 37 * 38 * Create a new main loop source that is able to 39 * monitor the file descriptor @fd for the 40 * I/O conditions in @condition. This is able 41 * monitor block devices, character devices, 42 * sockets, pipes but not plain files. 43 * 44 * Returns: the new main loop source 45 */ 46 GSource *qio_channel_create_fd_watch(QIOChannel *ioc, 47 int fd, 48 GIOCondition condition); 49 50 /** 51 * qio_channel_create_fd_pair_watch: 52 * @ioc: the channel object 53 * @fdread: the file descriptor for reading 54 * @fdwrite: the file descriptor for writing 55 * @condition: the I/O condition 56 * 57 * Create a new main loop source that is able to 58 * monitor the pair of file descriptors @fdread 59 * and @fdwrite for the I/O conditions in @condition. 60 * This is intended for monitoring unidirectional 61 * file descriptors such as pipes, where a pair 62 * of descriptors is required for bidirectional 63 * I/O 64 * 65 * Returns: the new main loop source 66 */ 67 GSource *qio_channel_create_fd_pair_watch(QIOChannel *ioc, 68 int fdread, 69 int fdwrite, 70 GIOCondition condition); 71 72 #endif /* QIO_CHANNEL_WATCH_H__ */ 73