source4/lib/events/events.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    generalised event loop handling
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #ifndef __EVENTS_H__
  24 #define __EVENTS_H__
  25
  26 #include "talloc.h"
  27 #include <stdlib.h>
  28
  29 struct event_context;
  30 struct event_ops;
  31 struct fd_event;
  32 struct timed_event;
  33 struct aio_event;
  34 struct signal_event;
  35
  36 /* event handler types */
  37 typedef void (*event_fd_handler_t)(struct event_context *, struct fd_event *,
  38                                    uint16_t , void *);
  39 typedef void (*event_timed_handler_t)(struct event_context *, struct timed_event *,
  40                                       struct timeval , void *);
  41 typedef void (*event_signal_handler_t)(struct event_context *, struct signal_event *,
  42                                        int , int, void *, void *);
  43 typedef void (*event_aio_handler_t)(struct event_context *, struct aio_event *,
  44                                     int, void *);
  45
  46 struct event_context *event_context_init(TALLOC_CTX *mem_ctx);
  47 struct event_context *event_context_init_byname(TALLOC_CTX *mem_ctx, const char *name);
  48 const char **event_backend_list(TALLOC_CTX *mem_ctx);
  49
  50 struct fd_event *event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
  51                               int fd, uint16_t flags, event_fd_handler_t handler,
  52                               void *private);
  53
  54 struct timed_event *event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
  55                                     struct timeval next_event,
  56                                     event_timed_handler_t handler,
  57                                     void *private);
  58
  59 struct signal_event *event_add_signal(struct event_context *ev, TALLOC_CTX *mem_ctx,
  60                                       int signum, int sa_flags,
  61                                       event_signal_handler_t handler,
  62                                       void *private);
  63
  64 struct iocb;
  65 struct aio_event *event_add_aio(struct event_context *ev,
  66                                 TALLOC_CTX *mem_ctx,
  67                                 struct iocb *iocb,
  68                                 event_aio_handler_t handler,
  69                                 void *private);
  70
  71 int event_loop_once(struct event_context *ev);
  72 int event_loop_wait(struct event_context *ev);
  73
  74 uint16_t event_get_fd_flags(struct fd_event *fde);
  75 void event_set_fd_flags(struct fd_event *fde, uint16_t flags);
  76
  77 struct event_context *event_context_find(TALLOC_CTX *mem_ctx);
  78
  79 /* bits for file descriptor event flags */
  80 #define EVENT_FD_READ 1
  81 #define EVENT_FD_WRITE 2
  82
  83 #define EVENT_FD_WRITEABLE(fde) \
  84         event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_WRITE)
  85 #define EVENT_FD_READABLE(fde) \
  86         event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_READ)
  87
  88 #define EVENT_FD_NOT_WRITEABLE(fde) \
  89         event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_WRITE)
  90 #define EVENT_FD_NOT_READABLE(fde) \
  91         event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_READ)
  92
  93 #endif /* __EVENTS_H__ */