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 <sys/types.h>
  25 #include <stdbool.h>
  26 #include <stdint.h>
  27 #include <signal.h>
  28
  29 #if defined(__APPLE__) || defined(__FreeBSD__)
  30 #define USE_KQUEUE
  31 #else
  32 #define USE_EPOLL
  33 #endif
  34
  35 #include "list.h"
  36
  37 struct uloop_fd;
  38 struct uloop_timeout;
  39 struct uloop_process;
  40
  41 typedef void (*uloop_fd_handler)(struct uloop_fd *u, unsigned int events);
  42 typedef void (*uloop_timeout_handler)(struct uloop_timeout *t);
  43 typedef void (*uloop_process_handler)(struct uloop_process *c, int ret);
  44
  45 #define ULOOP_READ              (1 << 0)
  46 #define ULOOP_WRITE             (1 << 1)
  47 #define ULOOP_EDGE_TRIGGER      (1 << 2)
  48 #define ULOOP_BLOCKING          (1 << 3)
  49 #ifdef USE_KQUEUE
  50 #define ULOOP_EDGE_DEFER        (1 << 4)
  51 #endif
  52
  53 struct uloop_fd
  54 {
  55         uloop_fd_handler cb;
  56         int fd;
  57         bool eof;
  58         bool error;
  59         bool registered;
  60 #ifdef USE_KQUEUE
  61         bool flags;
  62 #endif
  63 };
  64
  65 struct uloop_timeout
  66 {
  67         struct list_head list;
  68         bool pending;
  69
  70         uloop_timeout_handler cb;
  71         struct timeval time;
  72 };
  73
  74 struct uloop_process
  75 {
  76         struct list_head list;
  77         bool pending;
  78
  79         uloop_process_handler cb;
  80         pid_t pid;
  81 };
  82
  83 extern bool uloop_cancelled;
  84 extern bool uloop_handle_sigchld;
  85
  86 int uloop_fd_add(struct uloop_fd *sock, unsigned int flags);
  87 int uloop_fd_delete(struct uloop_fd *sock);
  88
  89 int uloop_timeout_add(struct uloop_timeout *timeout);
  90 int uloop_timeout_set(struct uloop_timeout *timeout, int msecs);
  91 int uloop_timeout_cancel(struct uloop_timeout *timeout);
  92
  93 int uloop_process_add(struct uloop_process *p);
  94 int uloop_process_delete(struct uloop_process *p);
  95
  96 static inline void uloop_end(void)
  97 {
  98         uloop_cancelled = true;
  99 }
 100
 101 int uloop_init(void);
 102 void uloop_run(void);
 103 void uloop_done(void);
 104
 105 #endif