+++ /dev/null
-/*!
- * \file
- * <!--
- * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
- * -->
- *
- * \version $Id$
- *
- * \brief Notifier obj (interface).
- *
- * \version $Id$
- * \author Bernardo Innocenti <bernie@develer.com>
- * \author Francesco Sacchi <batt@develer.com>
- */
-
-/*#*
- *#* $Log$
- *#* Revision 1.1 2005/11/04 18:26:38 bernie
- *#* Import into DevLib.
- *#*
- *#* Revision 1.4 2005/06/09 13:23:58 batt
- *#* Add some comments.
- *#*
- *#* Revision 1.3 2005/06/08 17:32:33 batt
- *#* Switch to new messaging system.
- *#*
- *#* Revision 1.2 2005/06/06 11:04:12 batt
- *#* Add some comments.
- *#*
- *#* Revision 1.1 2005/05/26 08:32:53 batt
- *#* Add new Develer widget system :)
- *#*
- *#*/
-#ifndef DT_DNOTIFIER_H
-#define DT_DNOTIFIER_H
-
-#include <cfg/debug.h>
-#include <dt/dtag.h>
-#include <mware/list.h>
-
-//Fwd declaretion.
-struct DNotifier;
-struct DFilter;
-
-typedef void (* update_func_ptr)(struct DNotifier *, dtag_t, dval_t);
-typedef void (* update_filter_ptr)(struct DFilter *, dtag_t, dval_t);
-
-/*!
- * Base object for receive and forward messages.
- * It contains an update function used to update itslef and a list to
- * notify other DNotifer eventually connected.
- */
-typedef struct DNotifier
-{
- //! Receive new attributes from other notifiers.
- update_func_ptr update;
-
- //! List of target notifiers to set new attributes to.
- List targets;
-} DNotifier;
-
-/*!
- * Map for messages.
- * Used to translate src message to dst message.
- */
-typedef struct DFilterMap
-{
- DTagItem src;
- DTagItem dst;
-} DFilterMap;
-
-
-/*!
- * A filter is an interface between two notifier.
- * It can translate messages between them through a map (if it is not null).
- */
-typedef struct DFilter
-{
- //! Allow creating a list of dfilter objects.
- Node link;
-
- //! Target of the filter
- DNotifier *target;
-
- //! Update function called by the source dnotifier
- update_filter_ptr update;
-
- //!Map for translating messages for target
- const DFilterMap *map;
-
- //!Used in debug to prevent inserting this filter in more than one list
- DB(uint8_t magic;)
-} DFilter;
-
-//! Type for filter-mask checking
-typedef uint16_t dfilter_mask_t;
-
-//! Filter init
-void filter_init(DFilter *f, const DFilterMap *map, bool masked, DNotifier *source, DNotifier *target);
-
-//! Filter update function without masking capabilities.
-void filter_update(DFilter *f, dtag_t tag, dval_t val);
-
-//! Filter update function with masking capabilities.
-void filter_mask_update(DFilter *f, dtag_t tag, dval_t val);
-
-//! Notifier init
-void notifier_init(DNotifier *n);
-
-
-/*!
- * Macro to notify the target object.
- */
-INLINE void dnotify(DNotifier *target, dtag_t tag, dval_t val)
-{
- if (target)
- target->update(target, tag, val);
-}
-
-/*!
- * Macro to notify all the targets of \a target object.
- */
-INLINE void dnotify_targets(DNotifier *target, dtag_t tag, dval_t val)
-{
- DFilter *f;
- if (!ISLISTEMPTY(&target->targets))
- FOREACHNODE(f, &target->targets)
- f->update(f, tag, val);
-}
-
-
-/*!
- * Macro that connect \a src notifier to \a tgt using \a map and passing \a opt for filtering option.
- * It declares a static filter to achieve connection and messages translation.
- * \note Due its static filter declaration, DCONNECT MUST NOT be used inside loops or in functions called multiple times.
- * Failing to do so will lead to unpredictable connections between notifiers.
- */
-#define DCONNECT(src, tgt, map, opt) \
- do { \
- static DFilter _filter_; /* Declare a filter */ \
- filter_init(&(_filter_), map, opt, src, tgt); /* Init it. */ \
- } while (0)
-
-
-#endif /* DT_DNOTIFIER_H */