samba-mirror/source4/lib/events/tevent_s4.c

/* 
   Unix SMB/CIFS implementation.
   Copyright (C) Andrew Tridgell 2003
   
   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/>.
*/

#include "includes.h"
#include "lib/events/events.h"

/*
  this is used to catch debug messages from events
*/
static void ev_wrap_debug(void *context, enum tevent_debug_level level,
			  const char *fmt, va_list ap)  PRINTF_ATTRIBUTE(3,0);

static void ev_wrap_debug(void *context, enum tevent_debug_level level,
			  const char *fmt, va_list ap)
{
	int samba_level = -1;
	char *s = NULL;
	switch (level) {
	case TEVENT_DEBUG_FATAL:
		samba_level = 0;
		break;
	case TEVENT_DEBUG_ERROR:
		samba_level = 1;
		break;
	case TEVENT_DEBUG_WARNING:
		samba_level = 2;
		break;
	case TEVENT_DEBUG_TRACE:
		samba_level = 10;
		break;

	};
	vasprintf(&s, fmt, ap);
	if (!s) return;
	DEBUG(samba_level, ("tevent: %s", s));
	free(s);
}

/*
  create a event_context structure. This must be the first events
  call, and all subsequent calls pass this event_context as the first
  element. Event handlers also receive this as their first argument.

  This samba4 specific call sets the samba4 debug handler.
*/
struct tevent_context *s4_event_context_init(TALLOC_CTX *mem_ctx)
{
	struct tevent_context *ev;

	ev = tevent_context_init_byname(mem_ctx, NULL);
	if (ev) {
		tevent_set_debug(ev, ev_wrap_debug, NULL);
	}
	return ev;
}

/*
  find an event context that is a parent of the given memory context,
  or create a new event context as a child of the given context if
  none is found

  This should be used in preference to event_context_init() in places
  where you would prefer to use the existing event context if possible
  (which is most situations)
*/
struct tevent_context *event_context_find(TALLOC_CTX *mem_ctx)
{
	struct tevent_context *ev = talloc_find_parent_bytype(mem_ctx, struct tevent_context);
	if (ev == NULL) {		
		ev = tevent_context_init(mem_ctx);
	}
	return ev;
}