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Opencv 3.1 project on GR-PEACH board

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platform/mbed_poll.h@166:3a9487d57a5c, 2017-06-29 (annotated)

Committer:
thedo
Date:
Thu Jun 29 11:00:41 2017 +0000
Revision:
166:3a9487d57a5c
This is Opencv 3.1 project on GR-PEACH board

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thedo 166:3a9487d57a5c 1 /* mbed Microcontroller Library
thedo 166:3a9487d57a5c 2 * Copyright (c) 2017 ARM Limited
thedo 166:3a9487d57a5c 3 *
thedo 166:3a9487d57a5c 4 * Licensed under the Apache License, Version 2.0 (the "License");
thedo 166:3a9487d57a5c 5 * you may not use this file except in compliance with the License.
thedo 166:3a9487d57a5c 6 * You may obtain a copy of the License at
thedo 166:3a9487d57a5c 7 *
thedo 166:3a9487d57a5c 8 * http://www.apache.org/licenses/LICENSE-2.0
thedo 166:3a9487d57a5c 9 *
thedo 166:3a9487d57a5c 10 * Unless required by applicable law or agreed to in writing, software
thedo 166:3a9487d57a5c 11 * distributed under the License is distributed on an "AS IS" BASIS,
thedo 166:3a9487d57a5c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
thedo 166:3a9487d57a5c 13 * See the License for the specific language governing permissions and
thedo 166:3a9487d57a5c 14 * limitations under the License.
thedo 166:3a9487d57a5c 15 */
thedo 166:3a9487d57a5c 16 #ifndef MBED_POLL_H
thedo 166:3a9487d57a5c 17 #define MBED_POLL_H
thedo 166:3a9487d57a5c 18
thedo 166:3a9487d57a5c 19 #define POLLIN 0x0001 ///< Data may be read without blocking
thedo 166:3a9487d57a5c 20 #define POLLOUT 0x0010 ///< Data may be written without blocking
thedo 166:3a9487d57a5c 21 #define POLLERR 0x1000 ///< An error has occurred on the device or stream
thedo 166:3a9487d57a5c 22 #define POLLHUP 0x2000 ///< The device has been disconnected
thedo 166:3a9487d57a5c 23 #define POLLNVAL 0x4000 ///< The specified file handle value is invalid
thedo 166:3a9487d57a5c 24
thedo 166:3a9487d57a5c 25 namespace mbed {
thedo 166:3a9487d57a5c 26
thedo 166:3a9487d57a5c 27 class FileHandle;
thedo 166:3a9487d57a5c 28
thedo 166:3a9487d57a5c 29 /** \addtogroup platform */
thedo 166:3a9487d57a5c 30
thedo 166:3a9487d57a5c 31
thedo 166:3a9487d57a5c 32 struct pollfh {
thedo 166:3a9487d57a5c 33 FileHandle *fh;
thedo 166:3a9487d57a5c 34 short events;
thedo 166:3a9487d57a5c 35 short revents;
thedo 166:3a9487d57a5c 36 };
thedo 166:3a9487d57a5c 37
thedo 166:3a9487d57a5c 38 /** A mechanism to multiplex input/output over a set of file handles(file descriptors).
thedo 166:3a9487d57a5c 39 * For every file handle provided, poll() examines it for any events registered for that particular
thedo 166:3a9487d57a5c 40 * file handle.
thedo 166:3a9487d57a5c 41 *
thedo 166:3a9487d57a5c 42 * @param fhs an array of PollFh struct carrying a FileHandle and bitmasks of events
thedo 166:3a9487d57a5c 43 * @param nfhs number of file handles
thedo 166:3a9487d57a5c 44 * @param timeout timer value to timeout or -1 for loop forever
thedo 166:3a9487d57a5c 45 *
thedo 166:3a9487d57a5c 46 * @return number of file handles selected (for which revents is non-zero). 0 if timed out with nothing selected. -1 for error.
thedo 166:3a9487d57a5c 47 */
thedo 166:3a9487d57a5c 48 int poll(pollfh fhs[], unsigned nfhs, int timeout);
thedo 166:3a9487d57a5c 49
thedo 166:3a9487d57a5c 50 } // namespace mbed
thedo 166:3a9487d57a5c 51
thedo 166:3a9487d57a5c 52 #endif //MBED_POLL_H
thedo 166:3a9487d57a5c 53