ceph/src/dpdk/lib/librte_vhost/fd_man.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef _FD_MAN_H_
  35 #define _FD_MAN_H_
  36 #include <stdint.h>
  37 #include <pthread.h>
  38
  39 #define MAX_FDS 1024
  40
  41 typedef void (*fd_cb)(int fd, void *dat, int *remove);
  42
  43 struct fdentry {
  44         int fd;         /* -1 indicates this entry is empty */
  45         fd_cb rcb;      /* callback when this fd is readable. */
  46         fd_cb wcb;      /* callback when this fd is writeable.*/
  47         void *dat;      /* fd context */
  48         int busy;       /* whether this entry is being used in cb. */
  49 };
  50
  51 struct fdset {
  52         struct fdentry fd[MAX_FDS];
  53         pthread_mutex_t fd_mutex;
  54         int num;        /* current fd number of this fdset */
  55 };
  56
  57
  58 void fdset_init(struct fdset *pfdset);
  59
  60 int fdset_add(struct fdset *pfdset, int fd,
  61         fd_cb rcb, fd_cb wcb, void *dat);
  62
  63 void *fdset_del(struct fdset *pfdset, int fd);
  64
  65 void fdset_event_dispatch(struct fdset *pfdset);
  66
  67 #endif