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/*
* Copyright (c) 2009-2015, Vsevolod Stakhov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RSPAMD_EVENTS_H
#define RSPAMD_EVENTS_H
#include "config.h"
#include "mem_pool.h"
struct rspamd_async_event;
struct rspamd_async_session;
typedef void (*event_finalizer_t)(gpointer ud);
typedef void (*event_watcher_t)(gpointer session_data, gpointer ud);
typedef gboolean (*session_finalizer_t)(gpointer user_data);
/**
* Make new async session
* @param pool pool to alloc memory from
* @param fin a callback called when no events are found in session
* @param restore a callback is called to restore processing of session
* @param cleanup a callback called when session is forcefully destroyed
* @param user_data abstract user data
* @return
*/
struct rspamd_async_session * rspamd_session_create (rspamd_mempool_t *pool,
session_finalizer_t fin, event_finalizer_t restore,
event_finalizer_t cleanup, gpointer user_data);
/**
* Insert new event to the session
* @param session session object
* @param fin finalizer callback
* @param user_data abstract user_data
* @param forced unused
*/
void rspamd_session_add_event (struct rspamd_async_session *session,
event_finalizer_t fin, gpointer user_data, GQuark subsystem);
/**
* Remove normal event
* @param session session object
* @param fin final callback
* @param ud user data object
*/
void rspamd_session_remove_event (struct rspamd_async_session *session,
event_finalizer_t fin,
gpointer ud);
/**
* Must be called at the end of session, it calls fin functions for all non-forced callbacks
* @return true if the whole session was destroyed and false if there are forced events
*/
gboolean rspamd_session_destroy (struct rspamd_async_session *session);
/**
* Check session for events pending and call fin callback if no events are pending
* @param session session object
* @return TRUE if session has pending events
*/
gboolean rspamd_session_pending (struct rspamd_async_session *session);
/**
* Returns number of events pending
* @param session
* @return
*/
guint rspamd_session_events_pending (struct rspamd_async_session *session);
/**
* Start watching for events in the session, so the specified watcher will be added
* to all subsequent events until `rspamd_session_watch_stop` is called
* @param s session object
* @param cb watcher callback that is called when all events watched are destroyed
* @param ud opaque data for the callback
*/
void rspamd_session_watch_start (struct rspamd_async_session *s,
event_watcher_t cb,
gpointer ud);
/**
* Stop watching mode, if no events are watched since the last `rspamd_session_watch_start`,
* then the watcher is silently ignored
* @param s session
* @return number of events watched
*/
guint rspamd_session_watch_stop (struct rspamd_async_session *s);
#endif /* RSPAMD_EVENTS_H */
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