rt-thread/components/drivers/include/ipc/poll.h

/*
 * File      : poll.h
 * This file is part of Device File System in RT-Thread RTOS
 * COPYRIGHT (C) 2006-2017, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2016-09-19     Heyuanjie    The first version.
 * 2016-12-26     Bernard      Update poll interface
 */
#ifndef IPC_POLL_H__
#define IPC_POLL_H__

#ifdef __cplusplus
extern "C" {
#endif

struct rt_pollreq;
typedef void (*poll_queue_proc)(rt_wqueue_t *, struct rt_pollreq *);

typedef struct rt_pollreq
{
    poll_queue_proc _proc;
    short _key;
} rt_pollreq_t;

rt_inline void rt_poll_add(rt_wqueue_t *wq, rt_pollreq_t *req)
{
    if (req && req->_proc && wq)
    {
        req->_proc(wq, req);
    }
}

#ifdef __cplusplus
}
#endif

#endif