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

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2014 Intel Corporation
   3  */
   4
   5 #ifndef _FD_MAN_H_
   6 #define _FD_MAN_H_
   7 #include <stdint.h>
   8 #include <pthread.h>
   9 #include <poll.h>
  10
  11 #define MAX_FDS 1024
  12
  13 typedef void (*fd_cb)(int fd, void *dat, int *remove);
  14
  15 struct fdentry {
  16         int fd;         /* -1 indicates this entry is empty */
  17         fd_cb rcb;      /* callback when this fd is readable. */
  18         fd_cb wcb;      /* callback when this fd is writeable.*/
  19         void *dat;      /* fd context */
  20         int busy;       /* whether this entry is being used in cb. */
  21 };
  22
  23 struct fdset {
  24         struct pollfd rwfds[MAX_FDS];
  25         struct fdentry fd[MAX_FDS];
  26         pthread_mutex_t fd_mutex;
  27         int num;        /* current fd number of this fdset */
  28
  29         union pipefds {
  30                 struct {
  31                         int pipefd[2];
  32                 };
  33                 struct {
  34                         int readfd;
  35                         int writefd;
  36                 };
  37         } u;
  38 };
  39
  40
  41 void fdset_init(struct fdset *pfdset);
  42
  43 int fdset_add(struct fdset *pfdset, int fd,
  44         fd_cb rcb, fd_cb wcb, void *dat);
  45
  46 void *fdset_del(struct fdset *pfdset, int fd);
  47 int fdset_try_del(struct fdset *pfdset, int fd);
  48
  49 void *fdset_event_dispatch(void *arg);
  50
  51 int fdset_pipe_init(struct fdset *fdset);
  52
  53 void fdset_pipe_uninit(struct fdset *fdset);
  54
  55 void fdset_pipe_notify(struct fdset *fdset);
  56
  57 #endif