include/sys/devpoll.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1998 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 /*
  28  * Copyright 2015, Joyent, Inc.
  29  */
  30
  31 #ifndef _SYS_DEVPOLL_H
  32 #define _SYS_DEVPOLL_H
  33
  34 #include <sys/poll_impl.h>
  35 #include <sys/types32.h>
  36
  37 #ifdef  __cplusplus
  38 extern "C" {
  39 #endif
  40
  41
  42 /* /dev/poll ioctl */
  43 #define         DPIOC   (0xD0 << 8)
  44 #define DP_POLL         (DPIOC | 1)     /* poll on fds cached via /dev/poll */
  45 #define DP_ISPOLLED     (DPIOC | 2)     /* is this fd cached in /dev/poll */
  46 #define DP_PPOLL        (DPIOC | 3)     /* ppoll on fds cached via /dev/poll */
  47 #define DP_EPOLLCOMPAT  (DPIOC | 4)     /* turn on epoll compatibility */
  48
  49 #define DEVPOLLSIZE     1000            /* /dev/poll table size increment */
  50
  51 /*
  52  * /dev/poll DP_POLL ioctl format
  53  */
  54 typedef struct dvpoll {
  55         pollfd_t        *dp_fds;        /* pollfd array */
  56         nfds_t          dp_nfds;        /* num of pollfd's in dp_fds[] */
  57         int             dp_timeout;     /* time out in milisec */
  58         sigset_t        *dp_setp;       /* sigset, if any */
  59 } dvpoll_t;
  60
  61 typedef struct dvpoll32 {
  62         caddr32_t       dp_fds;         /* pollfd array */
  63         uint32_t        dp_nfds;        /* num of pollfd's in dp_fds[] */
  64         int32_t         dp_timeout;     /* time out in milisec */
  65         caddr32_t       dp_setp;        /* sigset, if any */
  66 } dvpoll32_t;
  67
  68 typedef struct dvpoll_epollfd {
  69         pollfd_t        dpep_pollfd;    /* must be first member */
  70         uint64_t        dpep_data;      /* data payload */
  71 } dvpoll_epollfd_t;
  72
  73 #ifdef _KERNEL
  74
  75 typedef struct dp_entry {
  76         kmutex_t        dpe_lock;       /* protect a devpoll entry */
  77         pollcache_t     *dpe_pcache;    /* a ptr to pollcache */
  78         int             dpe_refcnt;     /* no. of ioctl lwp on the dpe */
  79         int             dpe_writerwait; /* no. of waits on write */
  80         int             dpe_flag;       /* see below */
  81         kcondvar_t      dpe_cv;
  82 } dp_entry_t;
  83
  84 #define DP_WRITER_PRESENT       0x1     /* a write is in progress */
  85 #define DP_ISEPOLLCOMPAT        0x2     /* epoll compatibility mode */
  86
  87 #define DP_REFRELE(dpep) {                      \
  88         mutex_enter(&(dpep)->dpe_lock);         \
  89         ASSERT((dpep)->dpe_refcnt > 0);         \
  90         (dpep)->dpe_refcnt--;                   \
  91         mutex_exit(&(dpep)->dpe_lock);          \
  92 }
  93 #endif  /* _KERNEL */
  94
  95 #ifdef  __cplusplus
  96 }
  97 #endif
  98
  99 #endif  /* _SYS_DEVPOLL_H */