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Diffstat (limited to 'include/gevent/gevent.h')
| -rw-r--r-- | include/gevent/gevent.h | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/include/gevent/gevent.h b/include/gevent/gevent.h deleted file mode 100644 index f9764336..00000000 --- a/include/gevent/gevent.h +++ /dev/null @@ -1,250 +0,0 @@ -/*
- ChibiOS/GFX - Copyright (C) 2012
- Joel Bodenmann aka Tectu <joel@unormal.org>
-
- This file is part of ChibiOS/GFX.
-
- ChibiOS/GFX 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.
-
- ChibiOS/GFX 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/>.
-*/
-/**
- * @file include/gevent/gevent.h
- * @brief GEVENT GFX User Event subsystem header file.
- *
- * @addtogroup GEVENT
- *
- * @details GEVENT provides a simple to use but yet powerful event
- * system.
- *
- * @pre GFX_USE_GEVENT must be set to TRUE in your gfxconf.h
- *
- * @{
- */
-#ifndef _GEVENT_H
-#define _GEVENT_H
-
-#include "gfx.h"
-
-#if GFX_USE_GEVENT || defined(__DOXYGEN__)
-
-/* Data part of a static GListener initializer */
-#define _GLISTENER_DATA(name) { _SEMAPHORE_DATA(name.waitqueue, 0), _BSEMAPHORE_DATA(name.eventlock, FALSE), 0, 0, {0} }
-/* Static GListener initializer */
-#define GLISTENER_DECL(name) GListener name = _GLISTENER_DATA(name)
-
-/*===========================================================================*/
-/* Type definitions */
-/*===========================================================================*/
-
-typedef uint16_t GEventType;
- #define GEVENT_NULL 0x0000 // Null Event - Do nothing
- #define GEVENT_EXIT 0x0001 // The listener is being forced to exit (someone is destroying the listener)
-
- /* Other event types are allocated in ranges in their respective include files */
- #define GEVENT_GINPUT_FIRST 0x0100 // GINPUT events range from 0x0100 to 0x01FF
- #define GEVENT_GWIN_FIRST 0x0200 // GWIN events range from 0x0200 to 0x02FF
- #define GEVENT_GADC_FIRST 0x0300 // GADC events range from 0x0300 to 0x033F
- #define GEVENT_GAUDIN_FIRST 0x0340 // GAUDIN events range from 0x0340 to 0x037F
- #define GEVENT_GAUDOUT_FIRST 0x0380 // GAUDOUT events range from 0x0380 to 0x03BF
- #define GEVENT_USER_FIRST 0x8000 // Any application defined events start at 0x8000
-
-// This object can be typecast to any GEventXxxxx type to allow any sub-system (or the application) to create events.
-// The prerequisite is that the new status structure type starts with a field named 'type' of type 'GEventType'.
-// The total status structure also must not exceed GEVENT_MAXIMUM_SIZE bytes.
-// For example, this is used by GWIN button events, GINPUT data streams etc.
-typedef union GEvent_u {
- GEventType type; // The type of this event
- char pad[GEVENT_MAXIMUM_SIZE]; // This is here to allow static initialisation of GEventObject's in the application.
- } GEvent;
-
-// A special callback function
-typedef void (*GEventCallbackFn)(void *param, GEvent *pe);
-
-// The Listener Object
-typedef struct GListener {
- Semaphore waitqueue; // Private: Semaphore for the listener to wait on.
- BinarySemaphore eventlock; // Private: Protect against more than one sources trying to use this event lock at the same time
- GEventCallbackFn callback; // Private: Call back Function
- void *param; // Private: Parameter for the callback function.
- GEvent event; // Public: The event object into which the event information is stored.
- } GListener;
-
-// The Source Object
-typedef struct GSource_t GSource, *GSourceHandle;
-
-// This structure is passed to a source to describe a contender listener for sending the current event.
-typedef struct GSourceListener_t {
- GListener *pListener; // The listener
- GSource *pSource; // The source
- unsigned listenflags; // The flags the listener passed when the source was assigned to it.
- unsigned srcflags; // For the source's exclusive use. Initialised as 0 for a new listener source assignment.
- } GSourceListener;
-
-/*===========================================================================*/
-/* External declarations. */
-/*===========================================================================*/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* How to listen for events (act as a Listener)...
- 1. Get handles for all the event sources you are interested in.
- 2. Initialise a listener
- 3. Attach sources to your listener.
- - Sources can be attached or detached from a listener at any time.
- - A source can be attached to more than one listener.
- 4. Loop on getting listener events
- 5. When finished detach all sources from the listener
-
- How to create events (act as a Source)...
- 1. Provide a funtion to the application that returns a GSourceHandle (which can be a pointer to whatever the source wants)
- 2. Whenever a possible event occurs call geventGetSourceListener to get a pointer to a GSourceListener.
- This will return NULL when there are no more listeners.
- For each listener - check the flags to see if an event should be sent.
- - use geventGetEvent() to get the event buffer supplied by the listener
- and then call geventSendEvent to send the event.
- - Note: geventGetEvent() may return FALSE to indicate the listener is currently not listening and
- therefore no event should be sent. This situation enables the source to (optionally) flag
- to the listener on its next wait that there have been missed events.
- - Note: The GSourceListener pointer (and the GEvent buffer) are only valid between
- the geventGetSourceListener call and either the geventSendEvent call or the next
- geventGetSourceListener call.
- - Note: All listeners must be processed for this event before anything else is processed.
-*/
-
-/*---------- Listener Functions --------------------------------------------*/
-
-/**
- * @brief Create a Listener
- * @details If insufficient resources are available it will either assert or return NULL
- * depending on the value of GEVENT_ASSERT_NO_RESOURCE.
- *
- * @param[in] pl A listener
- */
-void geventListenerInit(GListener *pl);
-
-/**
- * @brief Attach a source to a listener
- * @details Flags are interpreted by the source when generating events for each listener.
- * If this source is already assigned to the listener it will update the flags.
- * If insufficient resources are available it will either assert or return FALSE
- * depending on the value of GEVENT_ASSERT_NO_RESOURCE.
- *
- * @param[in] pl The listener
- * @param[in] gsh The source which has to be attached to the listener
- * @param[in] flags The flags
- *
- * @return TRUE if succeeded, FALSE otherwise
- */
-bool_t geventAttachSource(GListener *pl, GSourceHandle gsh, unsigned flags);
-
-/**
- * @brief Detach a source from a listener
- * @details If gsh is NULL detach all sources from this listener and if there is still
- * a thread waiting for events on this listener, it is sent the exit event.
- *
- * @param[in] pl The listener
- * @param[in] gsh The source
- */
-void geventDetachSource(GListener *pl, GSourceHandle gsh);
-
-/**
- * @brief Wait for an event on a listener from an assigned source.
- * @details The type of the event should be checked (pevent->type) and then pevent should
- * be typecast to the actual event type if it needs to be processed.
- * timeout specifies the time to wait in system ticks.
- * TIME_INFINITE means no timeout - wait forever for an event.
- * TIME_IMMEDIATE means return immediately
- * @note The GEvent buffer is staticly allocated within the GListener so the event does not
- * need to be dynamicly freed however it will get overwritten by the next call to
- * this routine.
- *
- * @param[in] pl The listener
- * @param[in] timeout The timeout
- *
- * @return NULL on timeout
- */
-GEvent *geventEventWait(GListener *pl, systime_t timeout);
-
-/* @brief Register a callback for an event on a listener from an assigned source.
- * @details The type of the event should be checked (pevent->type) and then pevent should be typecast to the
- * actual event type if it needs to be processed.
- *
- * @params[in] pl The Listener
- * @params[in] fn The function to call back
- * @params[in] param A parameter to pass the callback function
- *
- * @note The GEvent buffer is valid only during the time of the callback. The callback MUST NOT save
- * a pointer to the buffer for use outside the callback.
- * @note An existing callback function is de-registered by passing a NULL for 'fn'. Any existing
- * callback function is replaced. Any thread currently waiting using geventEventWait will be sent the exit event.
- * @note Callbacks occur in a thread context but stack space must be kept to a minumum and
- * the callback must process quickly as all other events are performed on a single thread.
- * @note In the callback function you should never call ANY event functions using your own GListener handle
- * as it WILL create a deadlock and lock the system up.
- * @note Applications should not use this call - geventEventWait() is the preferred mechanism for an
- * application. This call is provided for GUI objects that may not have their own thread.
- */
-void geventRegisterCallback(GListener *pl, GEventCallbackFn fn, void *param);
-
-/*---------- Source Functions --------------------------------------------*/
-
-/**
- * @brief Called by a source with a possible event to get a listener record.
- * @details @p lastlr should be NULL on the first call and thereafter the result of the previous call.
- *
- * @param[in] gsh The source handler
- * @param[in] lastlr The source listener
- *
- * @return NULL when there are no more listeners for this source
- */
-GSourceListener *geventGetSourceListener(GSourceHandle gsh, GSourceListener *lastlr);
-
-/**
- * @brief Get the event buffer from the GSourceListener.
- * @details A NULL return allows the source to record (perhaps in glr->scrflags) that the listener
- * has missed events. This can then be notified as part of the next event for the listener.
- * The buffer can only be accessed untill the next call to geventGetSourceListener
- * or geventSendEvent
- *
- * @param[in] psl The source listener
- *
- * @return NULL if the listener is not currently listening.
- */
-GEvent *geventGetEventBuffer(GSourceListener *psl);
-
-/**
- * @brief Called by a source to indicate the listener's event buffer has been filled.
- * @details After calling this function the source must not reference in fields in the GSourceListener or the event buffer.
- *
- * @param[in] psl The source listener
- */
-void geventSendEvent(GSourceListener *psl);
-
-/**
- * @brief Detach any listener that has this source attached
- *
- * @param[in] gsh The source handle
- */
-void geventDetachSourceListeners(GSourceHandle gsh);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* GFX_USE_GEVENT */
-
-#endif /* _GEVENT_H */
-/** @} */
-
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