/* 
   Unix SMB/CIFS implementation.

   generalised event loop handling

   Copyright (C) Andrew Tridgell 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/>.
*/

#ifndef __TEVENT_H__
#define __TEVENT_H__

#include <stdint.h>
#include <talloc.h>

struct tevent_context;
struct tevent_ops;
struct tevent_fd;
struct tevent_timer;
struct tevent_aio;
struct tevent_signal;

/* event handler types */
typedef void (*tevent_fd_handler_t)(struct tevent_context *,
				    struct tevent_fd *,
				    uint16_t , void *);
typedef void (*tevent_timer_handler_t)(struct tevent_context *,
				       struct tevent_timer *,
				       struct timeval , void *);
typedef void (*tevent_signal_handler_t)(struct tevent_context *,
					struct tevent_signal *,
				        int , int, void *, void *);
typedef void (*tevent_aio_handler_t)(struct tevent_context *,
				     struct tevent_aio *,
				     int, void *);

struct tevent_context *tevent_context_init(TALLOC_CTX *mem_ctx);
struct tevent_context *tevent_context_init_byname(TALLOC_CTX *mem_ctx, const char *name);
const char **tevent_backend_list(TALLOC_CTX *mem_ctx);
void tevent_set_default_backend(const char *backend);

struct tevent_fd *tevent_add_fd(struct tevent_context *ev,
				TALLOC_CTX *mem_ctx,
				int fd, uint16_t flags,
				tevent_fd_handler_t handler,
				void *private_data);

struct tevent_timer *tevent_add_timer(struct tevent_context *ev,
				      TALLOC_CTX *mem_ctx,
				      struct timeval next_event,
				      tevent_timer_handler_t handler,
				      void *private_data);

struct tevent_signal *tevent_add_signal(struct tevent_context *ev,
					TALLOC_CTX *mem_ctx,
					int signum, int sa_flags,
					tevent_signal_handler_t handler,
					void *private_data);

struct iocb;
struct tevent_aio *tevent_add_aio(struct tevent_context *ev,
				  TALLOC_CTX *mem_ctx,
				  struct iocb *iocb,
				  tevent_aio_handler_t handler,
				  void *private_data);

int tevent_loop_once(struct tevent_context *ev);
int tevent_loop_wait(struct tevent_context *ev);

uint16_t tevent_fd_get_flags(struct tevent_fd *fde);
void tevent_fd_set_flags(struct tevent_fd *fde, uint16_t flags);

/* bits for file descriptor event flags */
#define TEVENT_FD_READ 1
#define TEVENT_FD_WRITE 2
#define TEVENT_FD_AUTOCLOSE 4

#define TEVENT_FD_WRITEABLE(fde) \
	tevent_fd_set_flags(fde, tevent_fd_get_flags(fde) | TEVENT_FD_WRITE)
#define TEVENT_FD_READABLE(fde) \
	tevent_fd_set_flags(fde, tevent_fd_get_flags(fde) | TEVENT_FD_READ)

#define TEVENT_FD_NOT_WRITEABLE(fde) \
	tevent_fd_set_flags(fde, tevent_fd_get_flags(fde) & ~TEVENT_FD_WRITE)
#define TEVENT_FD_NOT_READABLE(fde) \
	tevent_fd_set_flags(fde, tevent_fd_get_flags(fde) & ~TEVENT_FD_READ)

/* for now always define the compat symbols */
#ifndef TEVENT_COMPAT_DEFINES
#define TEVENT_COMPAT_DEFINES 1
#endif

#ifdef TEVENT_COMPAT_DEFINES

#define event_context	tevent_context
#define event_ops	tevent_ops
#define fd_event	tevent_fd
#define timed_event	tevent_timer
#define aio_event	tevent_aio
#define signal_event	tevent_signal

#define event_fd_handler_t	tevent_fd_handler_t
#define event_timed_handler_t	tevent_timer_handler_t
#define event_aio_handler_t	tevent_aio_handler_t
#define event_signal_handler_t	tevent_signal_handler_t

#define event_context_init(mem_ctx) \
	tevent_context_init(mem_ctx)

#define event_context_init_byname(mem_ctx, name) \
	tevent_context_init_byname(mem_ctx, name)

#define event_backend_list(mem_ctx) \
	tevent_backend_list(mem_ctx)

#define event_set_default_backend(backend) \
	tevent_set_default_backend(backend)

#define event_add_fd(ev, mem_ctx, fd, flags, handler, private_data) \
	tevent_add_fd(ev, mem_ctx, fd, flags, handler, private_data)

#define event_add_timed(ev, mem_ctx, next_event, handler, private_data) \
	tevent_add_timer(ev, mem_ctx, next_event, handler, private_data)

#define event_add_signal(ev, mem_ctx, signum, sa_flags, handler, private_data) \
	tevent_add_signal(ev, mem_ctx, signum, sa_flags, handler, private_data)

#define event_add_aio(ev, mem_ctx, iocb, handler, private_data) \
	tevent_add_aio(ev, mem_ctx, iocb, handler, private_data)

#define event_loop_once(ev) \
	tevent_loop_once(ev)

#define event_loop_wait(ev) \
	tevent_loop_wait(ev)

#define event_get_fd_flags(fde) \
	tevent_fd_get_flags(fde)

#define event_set_fd_flags(fde, flags) \
	tevent_fd_set_flags(fde, flags)

#define EVENT_FD_READ		TEVENT_FD_READ
#define EVENT_FD_WRITE		TEVENT_FD_WRITE
#define EVENT_FD_AUTOCLOSE	TEVENT_FD_AUTOCLOSE

#define EVENT_FD_WRITEABLE(fde) \
	TEVENT_FD_WRITEABLE(fde)

#define EVENT_FD_READABLE(fde) \
	TEVENT_FD_READABLE(fde)

#define EVENT_FD_NOT_WRITEABLE(fde) \
	TEVENT_FD_NOT_WRITEABLE(fde)

#define EVENT_FD_NOT_READABLE(fde) \
	TEVENT_FD_NOT_READABLE(fde)

#endif /* TEVENT_COMPAT_DEFINES */

#endif /* __TEVENT_H__ */