uloop.h

   1 /*
   2  *   Copyright (C) 2010 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  */
  19
  20 #ifndef _ULOOP_H__
  21 #define _ULOOP_H__
  22
  23 #include <sys/time.h>
  24 #include <stdbool.h>
  25 #include <stdint.h>
  26
  27 #if defined(__APPLE__) || defined(__FreeBSD__)
  28 #define USE_KQUEUE
  29 #else
  30 #define USE_EPOLL
  31 #endif
  32
  33 struct uloop_fd;
  34 struct uloop_timeout;
  35
  36 typedef void (*uloop_fd_handler)(struct uloop_fd *u, unsigned int events);
  37 typedef void (*uloop_timeout_handler)(struct uloop_timeout *t);
  38
  39 #define ULOOP_READ              (1 << 0)
  40 #define ULOOP_WRITE             (1 << 1)
  41 #define ULOOP_EDGE_TRIGGER      (1 << 2)
  42 #define ULOOP_BLOCKING          (1 << 3)
  43
  44 struct uloop_fd
  45 {
  46         uloop_fd_handler cb;
  47         int fd;
  48         bool eof;
  49         bool error;
  50         bool registered;
  51 #ifdef USE_KQUEUE
  52         uint8_t kqflags;
  53 #endif
  54 };
  55
  56 struct uloop_timeout
  57 {
  58         uloop_timeout_handler cb;
  59         struct uloop_timeout *prev;
  60         struct uloop_timeout *next;
  61         struct timeval time;
  62         bool pending;
  63 };
  64
  65 extern bool uloop_cancelled;
  66
  67 int uloop_fd_add(struct uloop_fd *sock, unsigned int flags);
  68 int uloop_fd_delete(struct uloop_fd *sock);
  69
  70 int uloop_timeout_add(struct uloop_timeout *timeout);
  71 int uloop_timeout_set(struct uloop_timeout *timeout, int msecs);
  72 int uloop_timeout_cancel(struct uloop_timeout *timeout);
  73
  74 void uloop_end(void);
  75 int uloop_init(void);
  76 void uloop_run(void);
  77 void uloop_done(void);
  78
  79 #endif