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/*
* hook.h
* Copyright 2011 John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#ifndef LIBAUDCORE_HOOK_H
#define LIBAUDCORE_HOOK_H
typedef void (* HookFunction) (void * data, void * user);
/* Adds <func> to the list of functions to be called when the hook <name> is
* triggered. */
void hook_associate (const char * name, HookFunction func, void * user);
/* Removes all instances matching <func> and <user> from the list of functions
* to be called when the hook <name> is triggered. If <user> is NULL, all
* instances matching <func> are removed. */
void hook_dissociate_full (const char * name, HookFunction func, void * user);
#define hook_dissociate(n, f) hook_dissociate_full (n, f, NULL)
/* Triggers the hook <name>. */
void hook_call (const char * name, void * data);
/* Schedules a call of the hook <name> from the program's main loop, to be
* executed in <time> milliseconds. If <destroy> is not NULL, it will be called
* on <data> after the hook is called. */
void event_queue_full (int time, const char * name, void * data, void (* destroy) (void *));
#define event_queue(n, d) event_queue_full (0, n, d, NULL)
/* Cancels pending hook calls matching <name> and <data>. If <data> is NULL,
* all hook calls matching <name> are canceled. */
void event_queue_cancel (const char * name, void * data);
/* Cancels all pending hook calls. */
void event_queue_cancel_all (void);
#endif /* LIBAUDCORE_HOOK_H */
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