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 3 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, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef __EVENTS_H__
  23 #define __EVENTS_H__
  24
  25 #include <stdint.h>
  26 #include <talloc.h>
  27
  28 struct event_context;
  29 struct event_ops;
  30 struct fd_event;
  31 struct timed_event;
  32 struct aio_event;
  33 struct signal_event;
  34
  35 /* event handler types */
  36 typedef void (*event_fd_handler_t)(struct event_context *, struct fd_event *,
  37                                    uint16_t , void *);
  38 typedef void (*event_timed_handler_t)(struct event_context *, struct timed_event *,
  39                                       struct timeval , void *);
  40 typedef void (*event_signal_handler_t)(struct event_context *, struct signal_event *,
  41                                        int , int, void *, void *);
  42 typedef void (*event_aio_handler_t)(struct event_context *, struct aio_event *,
  43                                     int, void *);
  44
  45 #ifdef _SAMBA_BUILD_
  46 struct event_context *s4_event_context_init_byname(TALLOC_CTX *mem_ctx, const char *name);
  47 struct event_context *s4_event_context_init(TALLOC_CTX *mem_ctx);
  48 #endif
  49
  50 struct event_context *event_context_init(TALLOC_CTX *mem_ctx);
  51 struct event_context *event_context_init_byname(TALLOC_CTX *mem_ctx, const char *name);
  52 const char **event_backend_list(TALLOC_CTX *mem_ctx);
  53 void event_set_default_backend(const char *backend);
  54
  55 struct fd_event *event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
  56                               int fd, uint16_t flags, event_fd_handler_t handler,
  57                               void *private);
  58
  59 struct timed_event *event_add_timed(struct event_context *ev, TALLOC_CTX *mem_ctx,
  60                                     struct timeval next_event,
  61                                     event_timed_handler_t handler,
  62                                     void *private);
  63
  64 struct signal_event *event_add_signal(struct event_context *ev, TALLOC_CTX *mem_ctx,
  65                                       int signum, int sa_flags,
  66                                       event_signal_handler_t handler,
  67                                       void *private);
  68
  69 struct iocb;
  70 struct aio_event *event_add_aio(struct event_context *ev,
  71                                 TALLOC_CTX *mem_ctx,
  72                                 struct iocb *iocb,
  73                                 event_aio_handler_t handler,
  74                                 void *private);
  75
  76 int event_loop_once(struct event_context *ev);
  77 int event_loop_wait(struct event_context *ev);
  78
  79 uint16_t event_get_fd_flags(struct fd_event *fde);
  80 void event_set_fd_flags(struct fd_event *fde, uint16_t flags);
  81
  82 struct event_context *event_context_find(TALLOC_CTX *mem_ctx);
  83
  84 /* bits for file descriptor event flags */
  85 #define EVENT_FD_READ 1
  86 #define EVENT_FD_WRITE 2
  87 #define EVENT_FD_AUTOCLOSE 4
  88
  89 #define EVENT_FD_WRITEABLE(fde) \
  90         event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_WRITE)
  91 #define EVENT_FD_READABLE(fde) \
  92         event_set_fd_flags(fde, event_get_fd_flags(fde) | EVENT_FD_READ)
  93
  94 #define EVENT_FD_NOT_WRITEABLE(fde) \
  95         event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_WRITE)
  96 #define EVENT_FD_NOT_READABLE(fde) \
  97         event_set_fd_flags(fde, event_get_fd_flags(fde) & ~EVENT_FD_READ)
  98
  99 #endif /* __EVENTS_H__ */