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Annotation of coherent/f/usr/include.78/poll.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT Version 4.0
        !             3:  *     Copyright (c) 1983, 1992 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: #ifndef        __POLL_H__
        !             7: #define        __POLL_H__
        !             8: /*
        !             9:  * This is a temporary file, and will NOT be binary compatible with System V.
        !            10:  */
        !            11: 
        !            12: /*
        !            13:  * Polling structure.
        !            14:  */
        !            15: struct pollfd {
        !            16:        int     fd;             /* file descriptor      */
        !            17:        short   events;         /* requested events     */
        !            18:        short   revents;        /* returned events      */
        !            19: };
        !            20: 
        !            21: /*
        !            22:  * Stream oriented events.
        !            23:  */
        !            24: #define        POLLIN   000001         /* input data is available              */
        !            25: #define        POLLPRI  000002         /* priority message is available        */
        !            26: #define        POLLOUT  000004         /* output can be sent                   */
        !            27: #define        POLLERR  000010         /* a fatal error has occurred           */
        !            28: #define        POLLHUP  000020         /* a hangup condition exists            */
        !            29: #define        POLLNVAL 000040         /* fd does not access an open stream    */
        !            30: 
        !            31: /*
        !            32:  * Each pollable event in the system has an associated event queue.
        !            33:  * An polled event will be
        !            34:  *     on a singularly-linked list throuch cprocp->p_polls, and
        !            35:  *     on a circularly-linked list through an event queue on the device.
        !            36:  */
        !            37: typedef
        !            38: struct event {
        !            39:        struct event *  e_pnext;        /* next polled event on proc    */
        !            40:        struct event *  e_dnext;        /* next polled event on device  */
        !            41:        struct event *  e_dlast;        /* prev polled event on device  */
        !            42:        struct proc  *  e_procp;        /* pointer to polling process   */
        !            43: } event_t;
        !            44: 
        !            45: #endif

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