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-rw-r--r--nuttx/include/poll.h138
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diff --git a/nuttx/include/poll.h b/nuttx/include/poll.h
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-/****************************************************************************
- * include/poll.h
- *
- * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
-
-#ifndef __INCLUDE_POLL_H
-#define __INCLUDE_POLL_H
-
-/****************************************************************************
- * Included Files
- ****************************************************************************/
-
-#include <nuttx/config.h>
-
-#include <stdint.h>
-#include <semaphore.h>
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/* Poll event definitions:
- *
- * POLLIN
- * Data other than high-priority data may be read without blocking.
- * POLLRDNORM
- * Normal data may be read without blocking.
- * POLLRDBAND
- * Priority data may be read without blocking.
- * POLLPRI
- * High priority data may be read without blocking.
- * POLLOUT
- * Normal data may be written without blocking.
- * POLLWRNORM
- * Equivalent to POLLOUT.
- * POLLWRBAND
- * Priority data may be written.
- * POLLERR
- * An error has occurred (revents only).
- * POLLHUP
- * Device has been disconnected (revents only).
- * POLLNVAL
- * Invalid fd member (revents only).
- */
-
-#define POLLIN (0x01) /* NuttX does not make priority distinctions */
-#define POLLRDNORM (0x01)
-#define POLLRDBAND (0x01)
-#define POLLPRI (0x01)
-
-#define POLLOUT (0x02) /* NuttX does not make priority distinctions */
-#define POLLWRNORM (0x02)
-#define POLLWRBAND (0x02)
-
-#define POLLERR (0x04)
-#define POLLHUP (0x08)
-#define POLLNVAL (0x10)
-
-/****************************************************************************
- * Public Type Definitions
- ****************************************************************************/
-
-/* The number of poll descriptors (required by poll() specification */
-
-typedef unsigned int nfds_t;
-
-/* In the standard poll() definition, the size of the event set is 'short'.
- * Here we pick the smallest storage element that will contain all of the
- * poll events.
- */
-
-typedef uint8_t pollevent_t;
-
-/* This is the Nuttx variant of the standard pollfd structure. */
-
-struct pollfd
-{
- int fd; /* The descriptor being polled */
- sem_t *sem; /* Pointer to semaphore used to post output event */
- pollevent_t events; /* The input event flags */
- pollevent_t revents; /* The output event flags */
- FAR void *priv; /* For use by drivers */
-};
-
-/****************************************************************************
- * Public Variables
- ****************************************************************************/
-
-#undef EXTERN
-#if defined(__cplusplus)
-#define EXTERN extern "C"
-extern "C" {
-#else
-#define EXTERN extern
-#endif
-
-/****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
-
-EXTERN int poll(FAR struct pollfd *fds, nfds_t nfds, int timeout);
-
-#undef EXTERN
-#if defined(__cplusplus)
-}
-#endif
-
-#endif /* __INCLUDE_POLL_H */