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/*
Unix SMB/CIFS implementation.
generalised event loop handling
Internal structs
Copyright (C) Stefan Metzmacher 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
struct event_ops {
/* conntext init */
int (*context_init)(struct event_context *ev);
/* fd_event functions */
struct fd_event *(*add_fd)(struct event_context *ev,
TALLOC_CTX *mem_ctx,
int fd, uint16_t flags,
event_fd_handler_t handler,
void *private_data);
uint16_t (*get_fd_flags)(struct fd_event *fde);
void (*set_fd_flags)(struct fd_event *fde, uint16_t flags);
/* timed_event functions */
struct timed_event *(*add_timed)(struct event_context *ev,
TALLOC_CTX *mem_ctx,
struct timeval next_event,
event_timed_handler_t handler,
void *private_data);
/* disk aio event functions */
struct aio_event *(*add_aio)(struct event_context *ev,
TALLOC_CTX *mem_ctx,
struct iocb *iocb,
event_aio_handler_t handler,
void *private_data);
/* signal functions */
struct signal_event *(*add_signal)(struct event_context *ev,
TALLOC_CTX *mem_ctx,
int signum, int sa_flags,
event_signal_handler_t handler,
void *private_data);
/* loop functions */
int (*loop_once)(struct event_context *ev);
int (*loop_wait)(struct event_context *ev);
};
struct fd_event {
struct fd_event *prev, *next;
struct event_context *event_ctx;
int fd;
uint16_t flags; /* see EVENT_FD_* flags */
event_fd_handler_t handler;
/* this is private for the specific handler */
void *private_data;
/* this is private for the events_ops implementation */
uint16_t additional_flags;
void *additional_data;
};
struct timed_event {
struct timed_event *prev, *next;
struct event_context *event_ctx;
struct timeval next_event;
event_timed_handler_t handler;
/* this is private for the specific handler */
void *private_data;
/* this is private for the events_ops implementation */
void *additional_data;
};
struct signal_event {
struct signal_event *prev, *next;
struct event_context *event_ctx;
event_signal_handler_t handler;
void *private_data;
int signum;
int sa_flags;
};
/* DEBUG */
enum ev_debug_level {EV_DEBUG_FATAL, EV_DEBUG_ERROR,
EV_DEBUG_WARNING, EV_DEBUG_TRACE};
struct ev_debug_ops {
void (*debug)(void *context, enum ev_debug_level level,
const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
void *context;
};
int ev_set_debug(struct event_context *ev,
void (*debug)(void *context, enum ev_debug_level level,
const char *fmt, va_list ap),
void *context);
int ev_set_debug_stderr(struct event_context *ev);
void ev_debug(struct event_context *ev, enum ev_debug_level level, const char *fmt, ...);
/* aio event is private to the aio backend */
struct aio_event;
struct event_context {
/* the specific events implementation */
const struct event_ops *ops;
/* list of timed events - used by common code */
struct timed_event *timed_events;
/* this is private for the events_ops implementation */
void *additional_data;
/* number of signal event handlers */
int num_signal_handlers;
/* pipe hack used with signal handlers */
struct fd_event *pipe_fde;
/* debugging operations */
struct ev_debug_ops debug_ops;
};
bool event_register_backend(const char *name, const struct event_ops *ops);
bool ev_timeval_is_zero(const struct timeval *tv);
struct timed_event *common_event_add_timed(struct event_context *, TALLOC_CTX *,
struct timeval, event_timed_handler_t, void *);
struct timeval common_event_loop_timer_delay(struct event_context *);
struct signal_event *common_event_add_signal(struct event_context *ev,
TALLOC_CTX *mem_ctx,
int signum,
int sa_flags,
event_signal_handler_t handler,
void *private_data);
int common_event_check_signal(struct event_context *ev);
bool events_standard_init(void);
bool events_select_init(void);
#if HAVE_EVENTS_EPOLL
bool events_epoll_init(void);
#endif
#if HAVE_LINUX_AIO
bool events_aio_init(void);
#endif
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