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EventQueue.h
1 /*
2  * Copyright (c) 2016-2019 ARM Limited
3  * SPDX-License-Identifier: Apache-2.0
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 #ifndef EVENT_QUEUE_H
19 #define EVENT_QUEUE_H
20 
21 #include "events/equeue.h"
22 #include "platform/Callback.h"
23 #include "platform/NonCopyable.h"
24 #include <cstddef>
25 #include <utility>
26 #include <chrono>
27 #include <new>
28 
29 namespace events {
30 /**
31  * \addtogroup events-public-api
32  * @{
33  */
34 
35 /** EVENTS_EVENT_SIZE
36  * Minimum size of an event
37  * This size fits a Callback<void()> at minimum
38  */
39 #define EVENTS_EVENT_SIZE \
40  (EQUEUE_EVENT_SIZE - 2*sizeof(void*) + sizeof(mbed::Callback<void()>))
41 
42 /** EVENTS_QUEUE_SIZE
43  * Default size of buffer for events
44  */
45 #define EVENTS_QUEUE_SIZE (32*EVENTS_EVENT_SIZE)
46 
47 // Predeclared classes
48 template <typename F>
49 class Event;
50 template <typename F, typename A>
51 class UserAllocatedEvent;
52 
53 /**
54  * \defgroup events_EventQueue EventQueue class
55  * @{
56  */
57 
58 /** EventQueue
59  *
60  * Flexible event queue for dispatching events
61  */
62 class EventQueue : private mbed::NonCopyable<EventQueue> {
63 public:
64  using duration = std::chrono::duration<int, std::milli>;
65 
66  /** Create an EventQueue
67  *
68  * Create an event queue. The event queue either allocates a buffer of
69  * the specified size with malloc or uses the user provided buffer or
70  * uses 1B dummy buffer if 0 size passed.
71  *
72  * 0 size queue is a special purpose queue to dispatch static events
73  * only (see UserAllocatedEvent). Such a queue gives the guarantee
74  * that no dynamic memory allocation will take place while queue
75  * creation and events posting & dispatching.
76  *
77  * @param size Size of buffer to use for events in bytes
78  * (default to EVENTS_QUEUE_SIZE)
79  * If 0 provided then 1B dummy buffer is used
80  * @param buffer Pointer to buffer to use for events
81  * (default to NULL)
82  */
83  EventQueue(unsigned size = EVENTS_QUEUE_SIZE, unsigned char *buffer = NULL);
84 
85  /** Destroy an EventQueue
86  */
87  ~EventQueue();
88 
89  /** Dispatch events
90  *
91  * Executes events for the specified number of milliseconds.
92  *
93  * The dispatch_for() function is guaranteed to terminate after the elapsed wait.
94  *
95  * @param ms Time to wait for events in milliseconds, expressed as a
96  * Chrono duration.
97  */
98  void dispatch_for(duration ms);
99 
100  /** Dispatch events
101  *
102  * Executes events until the specified milliseconds have passed.
103  * If ms is negative, the dispatch function will dispatch events
104  * indefinitely or until break_dispatch is called on this queue.
105  *
106  * When called with a finite timeout, the dispatch function is guaranteed
107  * to terminate. When called with a timeout of 0, the dispatch function
108  * does not wait and is IRQ safe.
109  *
110  * NOTE: Since the majority of the event library was updated to use
111  * Chrono types (as part of the Mbed 6 release), this function will not
112  * function as expected. Please update to use the new dispatch functions
113  * to ensure correct functionality.
114  *
115  * @param ms Time to wait for events in milliseconds, a negative
116  * value will dispatch events indefinitely
117  * (default to -1)
118  */
119  MBED_DEPRECATED_SINCE("mbed-os-6.7.0", "Use dispatch_for() to pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
120  void dispatch(int ms = -1);
121 
122  /** Dispatch events without a timeout
123  *
124  * Executes events indefinitely unless the dispatch loop is forcibly broken.
125  * @See break_dispatch()
126  *
127  */
128  void dispatch_forever();
129 
130  /** Dispatch currently queued events only and then terminate
131  *
132  * In this case the dispatch function does not wait.
133  *
134  */
135  void dispatch_once();
136 
137  /** Break out of a running event loop
138  *
139  * Forces the specified event queue's dispatch loop to terminate. Pending
140  * events may finish executing, but no new events will be executed.
141  */
142  void break_dispatch();
143 
144  /** Millisecond counter
145  *
146  * Returns the underlying tick of the event queue represented as the
147  * number of milliseconds that have passed since an arbitrary point in
148  * time. Intentionally overflows to 0 after 2^32-1.
149  *
150  * @return The underlying tick of the event queue in milliseconds
151  */
152  unsigned tick();
153 
154  /** Cancel an in-flight event
155  *
156  * Attempts to cancel an event referenced by the unique id returned from
157  * one of the call functions. It is not safe to call cancel after an event
158  * has already been dispatched.
159  *
160  * id must be valid i.e. event must have not finished executing.
161  *
162  * The cancel function is IRQ safe.
163  *
164  * If called while the event queue's dispatch loop is active in another thread,
165  * the cancel function does not guarantee that the event will not execute after it
166  * returns, as the event may have already begun executing. A call made from
167  * the same thread as the dispatch loop will always succeed with a valid id.
168  *
169  * @param id Unique id of the event
170  * @return true if event was successfully cancelled
171  * false if event was not cancelled (invalid id or executing already begun)
172  */
173  bool cancel(int id);
174 
175  /** Cancel an in-flight user allocated event
176  *
177  * Attempts to cancel an UserAllocatedEvent referenced by its address
178  * It is not safe to call cancel after an event has already been dispatched.
179  *
180  * Event must be valid i.e. event must have not finished executing
181  * and must have been bound to this queue.
182  *
183  * The cancel function is IRQ safe.
184  *
185  * If called while the event queue's dispatch loop is active in another thread,
186  * the cancel function does not guarantee that the event will not execute after it
187  * returns, as the event may have already begun executing. A call made from
188  * the same thread as the dispatch loop will always succeed with a valid id.
189  *
190  * @param event Address of the event
191  * @return true if event was successfully cancelled
192  * false if event was not cancelled (invalid queue or executing already begun)
193  */
194  template<typename F, typename A>
195  bool cancel(UserAllocatedEvent<F, A> *event)
196  {
197  if (event->_equeue != &_equeue) {
198  return false;
199  }
200  return equeue_cancel_user_allocated(&_equeue, event);
201  }
202 
203  /** Query how much time is left for delayed event
204  *
205  * If the event is delayed, this function can be used to query how much time
206  * is left until the event is due to be dispatched.
207  *
208  * id must be valid i.e. event must have not finished executing.
209  *
210  * This function is IRQ safe.
211  *
212  * @param id Unique id of the event
213  *
214  * @return Remaining time in milliseconds or
215  * 0 if event is already due to be dispatched or
216  * is currently executing.
217  * Undefined if id is invalid.
218  *
219  */
220  int time_left(int id);
221 
222  /** Query how much time is left for delayed UserAllocatedEvent
223  *
224  * If the event is delayed, this function can be used to query how much time
225  * is left until the event is due to be dispatched.
226  *
227  * Event must be valid i.e. event must have not finished executing
228  * and must have been bound to this queue.
229  *
230  * This function is IRQ safe.
231  *
232  * @param event Address of the event
233  *
234  * @return Remaining time in milliseconds or
235  * 0 if event is already due to be dispatched or
236  * is currently executing.
237  * Undefined if id is invalid.
238  *
239  */
240  template<typename F, typename A>
241  int time_left(UserAllocatedEvent<F, A> *event)
242  {
243  if (event && event->_equeue != &_equeue) {
244  return -1;
245  }
246  return equeue_timeleft_user_allocated(&_equeue, &event->_e);
247  }
248 
249  /** Background an event queue onto a single-shot timer-interrupt
250  *
251  * When updated, the event queue will call the provided update function
252  * with a timeout indicating when the queue should be dispatched. A
253  * negative timeout will be passed to the update function when the
254  * timer-interrupt is no longer needed.
255  *
256  * Passing a null function disables the existing update function.
257  *
258  * The background function allows an event queue to take advantage of
259  * hardware timers or other event loops, allowing an event queue to be
260  * ran in the background without consuming the foreground thread.
261  *
262  * @param update Function called to indicate when the queue should be
263  * dispatched
264  */
265  void background(mbed::Callback<void(int)> update);
266 
267  /** Chain an event queue onto another event queue
268  *
269  * After chaining a queue to a target, calling dispatch on the target
270  * queue will also dispatch events from this queue. The queues use
271  * their own buffers and events must be handled independently.
272  *
273  * A null queue as the target will unchain the existing queue.
274  *
275  * The chain function allows multiple event queues to be composed,
276  * sharing the context of a dispatch loop while still being managed
277  * independently
278  *
279  * @param target Queue that will dispatch this queue's events as a
280  * part of its dispatch loop
281  *
282  * @return Zero on success and negative error code value if chaining fails
283  *
284  */
285  int chain(EventQueue *target);
286 
287 
288 
289 #if defined(DOXYGEN_ONLY)
290  /** Calls an event on the queue
291  *
292  * The specified callback will be executed in the context of the event
293  * queue's dispatch loop.
294  *
295  * The call function is IRQ safe and can act as a mechanism for moving
296  * events out of IRQ contexts.
297  *
298  * @param f Function to execute in the context of the dispatch loop
299  * @param args Arguments to pass to the callback
300  * @return A unique id that represents the posted event and can
301  * be passed to cancel, or an id of 0 if there is not
302  * enough memory to allocate the event.
303  * Returned id will remain valid until event has finished
304  * executing.
305  *
306  * @code
307  * #include "mbed.h"
308  *
309  * int main() {
310  * // creates a queue with the default size
311  * EventQueue queue;
312  *
313  * // events are simple callbacks
314  * queue.call(printf, "called immediately\n");
315  *
316  * // the dispatch method executes events
317  * queue.dispatch();
318  * }
319  * @endcode
320  */
321  template <typename F, typename ...Args>
322  int call(F f, Args ...args);
323 
324  /** Calls an event on the queue
325  *
326  * The specified callback is executed in the context of the event
327  * queue's dispatch loop.
328  *
329  * The call function is IRQ safe and can act as a mechanism for moving
330  * events out of IRQ contexts.
331  *
332  * @param obj Object to call with the member function
333  * @param method Member function to execute in the context of the dispatch loop
334  * @param args Arguments to pass to the callback
335  * @return A unique ID that represents the posted event and can
336  * be passed to cancel, or an ID of 0 if there is not
337  * enough memory to allocate the event.
338  * Returned ID remains valid until event has finished
339  * executing.
340  *
341  * @code
342  * #include "mbed.h"
343  *
344  * class EventHandler {
345  * int _id;
346  * public:
347  * EventHandler(int id) : _id(id) { }
348  *
349  * void handler(int c) {
350  * printf("ID: %d Param: %d\r\n", _id, c);
351  * }
352  * };
353  *
354  * int main() {
355  * // creates a queue with the default size
356  * EventQueue queue;
357  *
358  * // Create EventHandler object with state
359  * EventHandler handler_cb(1);
360  *
361  * // events are simple callbacks, call object method
362  * // with provided parameter
363  * queue.call(&handler_cb, &EventHandler::handler, 2);
364  *
365  * // the dispath method executes events
366  * queue.dispatch();
367  * }
368  * @endcode
369  */
370  // AStyle ignore, not handling correctly below
371  // *INDENT-OFF*
372  template <typename T, typename R, typename ...Args>
373  int call(T *obj, R (T::*method)(Args ...args), Args ...args);
374  // *INDENT-ON*
375 
376  /** Calls an event on the queue after a specified delay
377  *
378  * The specified callback is executed in the context of the event
379  * queue's dispatch loop.
380  *
381  * The call_in function is IRQ safe and can act as a mechanism for moving
382  * events out of IRQ contexts.
383  *
384  * @param ms Time to delay in milliseconds
385  * @param f Function to execute in the context of the dispatch loop
386  * @param args Arguments to pass to the callback
387  * @return A unique ID that represents the posted event and can
388  * be passed to cancel, or an ID of 0 if there is not
389  * enough memory to allocate the event.
390  *
391  * @code
392  * #include "mbed.h"
393  * using namespace std::chrono_literals;
394  *
395  * int main() {
396  * // creates a queue with the default size
397  * EventQueue queue;
398  *
399  * // events are simple callbacks
400  * queue.call_in(2s, printf, "called in 2 seconds\n");
401  *
402  * // the dispatch methods executes events
403  * queue.dispatch();
404  * }
405  * @endcode
406  */
407  template <typename F, typename ...ArgTs>
408  int call_in(duration ms, F f, ArgTs ...args);
409 
410  /** Calls an event on the queue after a specified delay
411  *
412  * The specified callback is executed in the context of the event
413  * queue's dispatch loop.
414  *
415  * The call_in function is IRQ safe and can act as a mechanism for moving
416  * events out of IRQ contexts.
417  *
418  * @param ms Time to delay in milliseconds
419  * @param obj Object to call with the member function
420  * @param method Member function to execute in the context of the dispatch loop
421  * @param args Arguments to pass to the callback
422  * @return A unique ID that represents the posted event and can
423  * be passed to cancel, or an ID of 0 if there is not
424  * enough memory to allocate the event.
425  *
426  * @code
427  * #include "mbed.h"
428  * using namespace std::chrono_literals;
429  *
430  * class EventHandler {
431  * int _id;
432  * public:
433  * EventHandler(int id) : _id(id) { }
434  *
435  * void handler(int c) {
436  * printf("ID: %d Param: %d\r\n", _id, c);
437  * }
438  * };
439  *
440  * int main() {
441  * // creates a queue with the default size
442  * EventQueue queue;
443  *
444  * // Create EventHandler object with state
445  * EventHandler handler_cb(3);
446  *
447  * // events are simple callbacks, call object method in 2 seconds
448  * // with provided parameter
449  * queue.call_in(2s, &handler_cb, &EventHandler::handler, 4);
450  *
451  * // the dispatch method executes events
452  * queue.dispatch();
453  * }
454  * @endcode
455  */
456  // AStyle ignore, not handling correctly below
457  // *INDENT-OFF*
458  template <typename T, typename R, typename ...ArgTs>
459  int call_in(duration ms, T *obj, R (T::*method)(ArgTs ...args), ArgTs ...args);
460  // *INDENT-ON*
461 
462  /** Calls an event on the queue periodically
463  *
464  * @note The first call_every event occurs after the specified delay.
465  * To create a periodic event that fires immediately, @see Event.
466  *
467  * The specified callback is executed in the context of the event
468  * queue's dispatch loop.
469  *
470  * The call_every function is IRQ safe and can act as a mechanism for
471  * moving events out of IRQ contexts.
472  *
473  * @param ms Period of the event in milliseconds
474  * @param f Function to execute in the context of the dispatch loop
475  * @param args Arguments to pass to the callback
476  * @return A unique ID that represents the posted event and can
477  * be passed to cancel, or an ID of 0 if there is not
478  * enough memory to allocate the event.
479  *
480  * @code
481  * #include "mbed.h"
482  * using namespace std::chrono_literals;
483  *
484  * class EventHandler {
485  * int _id;
486  * public:
487  * EventHandler(int id) : _id(id) { }
488  *
489  * void handler(int c) {
490  * printf("ID: %d Param: %d\r\n", _id, c);
491  * }
492  * };
493  *
494  * int main() {
495  * // creates a queue with the default size
496  * EventQueue queue;
497  *
498  * // events are simple callbacks, call every 2 seconds
499  * queue.call_every(2s, printf, "Calling every 2 seconds\n");
500  *
501  * // the dispatch method executes events
502  * queue.dispatch();
503  * }
504  * @endcode
505  */
506  template <typename F, typename ...ArgTs>
507  int call_every(duration ms, F f, ArgTs ...args);
508 
509  /** Calls an event on the queue periodically
510  *
511  * @note The first call_every event occurs after the specified delay.
512  * To create a periodic event that fires immediately, @see Event.
513  *
514  * The specified callback is executed in the context of the event
515  * queue's dispatch loop.
516  *
517  * The call_every function is IRQ safe and can act as a mechanism for
518  * moving events out of IRQ contexts.
519  *
520  * @param ms Period of the event in milliseconds
521  * @param obj Object to call with the member function
522  * @param method Member function to execute in the context of the dispatch loop
523  * @param args Arguments to pass to the callback
524  *
525  * @code
526  * #include "mbed.h"
527  * using namespace std::chrono_literals;
528  *
529  * class EventHandler {
530  * int _id;
531  * public:
532  * EventHandler(int id) : _id(id) { }
533  *
534  * void handler(int c) {
535  * printf("ID: %d Param: %d\r\n", _id, c);
536  * }
537  * };
538  *
539  * int main() {
540  * // creates a queue with the default size
541  * EventQueue queue;
542  *
543  * // Create EventHandler object with state
544  * EventHandler handler_cb(5);
545  *
546  * // events are simple callbacks, call object method every 2 seconds
547  * // with provided parameter
548  * queue.call_every(2s, &handler_cb, &EventHandler::handler, 6);
549  *
550  * // the dispatch method executes events
551  * queue.dispatch();
552  * }
553  * @endcode
554  */
555  // AStyle ignore, not handling correctly below
556  // *INDENT-OFF*
557  template <typename T, typename R, typename ...ArgTs>
558  int call_every(duration ms, T *obj, R (T::*method)(ArgTs ...args), ArgTs ...args);
559  // *INDENT-ON*
560 
561  /** Creates an event bound to the event queue
562  *
563  * Constructs an event bound to the specified event queue. The specified
564  * callback acts as the target for the event and is executed in the
565  * context of the event queue's dispatch loop once posted.
566  *
567  * @param func Function to execute when the event is dispatched
568  * @param context_args Arguments to pass to the callback
569  * @return Event that dispatches on the specific queue
570  *
571  * @code
572  * #include "mbed.h"
573  *
574  * void handler(int c) {
575  * printf("Param: %d\r\n", c);
576  * }
577  *
578  * int main()
579  * {
580  * EventQueue queue;
581  *
582  * // Create event with parameter
583  * Event<void()> e = queue.event(handler, 1);
584  * e();
585  *
586  * // Create event and post parameter later
587  * Event<void(int)> e2 = queue.event(handler);
588  *
589  * // Post the event with paramter 8
590  * e.post(8);
591  *
592  * // The dispatch method executes events
593  * queue.dispatch();
594  *
595  * e2.post(2);
596  *
597  * queue.dispatch();
598  * }
599  * @endcode
600  */
601  // AStyle ignore, not handling correctly below
602  // *INDENT-OFF*
603  template <typename R, typename ...BoundArgTs, typename ...ContextArgTs, typename ...ArgTs>
604  Event<void(ArgTs...)> event(R (*func)(BoundArgTs..., ArgTs...), ContextArgTs ...context_args);
605  // *INDENT-ON*
606 
607  /** Creates an event bound to the event queue
608  *
609  * Constructs an event bound to the specified event queue. The specified
610  * callback acts as the target for the event and is executed in the
611  * context of the event queue's dispatch loop once posted.
612  *
613  * @param obj Object to call with the member function
614  * @param method Member function to execute in the context of the dispatch loop
615  * @param context_args Arguments to pass to the callback
616  * @return Event that dispatches on the specific queue
617  *
618  * @code
619  * #include "mbed.h"
620  *
621  * class EventHandler {
622  * int _id;
623  *
624  * public:
625  * EventHandler(int id) : _id(id) { }
626  *
627  * void handler(int c) {
628  * printf("ID: %d Param: %d\r\n", _id, c);
629  * }
630  * };
631  *
632  * int main()
633  * {
634  * EventQueue queue;
635  *
636  * EventHandler handler_cb(10);
637  *
638  * // Create event on the eventqueue with a method callback
639  * Event<void(int)> e = queue.event(&handler_cb, &EventHandler::handler);
640  *
641  * // Post the event with paramter 8
642  * e.post(11);
643  *
644  * // The dispatch method executes events
645  * queue.dispatch();
646  * }
647  * @endcode
648  */
649  // AStyle ignore, not handling correctly below
650  // *INDENT-OFF*
651  template <typename T, typename R, typename ...BoundArgTs, typename ...ContextArgTs, typename ...ArgTs>
652  Event<void(ArgTs...)> event(T *obj, R (T::*method)(BoundArgTs..., ArgTs...), ContextArgTs ...context_args);
653  // *INDENT-ON*
654 
655  /** Creates an event bound to the event queue
656  *
657  * Constructs an event bound to the specified event queue. The specified
658  * callback acts as the target for the event and is executed in the
659  * context of the event queue's dispatch loop once posted.
660  *
661  * @param cb Callback object
662  * @param context_args Arguments to pass to the callback
663  * @return Event that dispatches on the specific queue
664  *
665  * @code
666  * #include "mbed.h"
667  *
668  * void handler(int c) {
669  * printf("Param: %d\r\n", c);
670  * }
671  *
672  * int main()
673  * {
674  * EventQueue queue;
675  * // Create callback object acting as a function
676  * // pointer to handler
677  * Callback<void(int)> cb(handler);
678  *
679  * // Pass the callback object to the eventqueue
680  * Event<void(int)> e = queue.event(cb);
681  *
682  * // Post the event with parameter 8
683  * e.post(9);
684  *
685  * // The dispatch method executes events
686  * q.dispatch();
687  * }
688  * @endcode
689  */
690  template <typename R, typename ...BoundArgTs, typename ...ContextArgTs, typename ...ArgTs>
691  Event<void(ArgTs...)> event(mbed::Callback<R(BoundArgTs..., ArgTs...)> cb, ContextArgTs ...context_args);
692 
693  /** Creates an user allocated event bound to the event queue
694  *
695  * Constructs an user allocated event bound to the specified event queue.
696  * The specified callback acts as the target for the event and is executed
697  * in the context of the event queue's dispatch loop once posted.
698  *
699  * @code
700  * #include "mbed.h"
701  *
702  * void handler(int data) { ... }
703  *
704  * class Device {
705  * public:
706  * void handler(int data) { ... }
707  * };
708  *
709  * Device dev;
710  *
711  * // queue with not internal storage for dynamic events
712  * // accepts only user allocated events
713  * static EventQueue queue(0);
714  * // Create events
715  * static auto e1 = make_user_allocated_event(&dev, Device::handler, 2);
716  * static auto e2 = queue.make_user_allocated_event(handler, 3);
717  *
718  * int main()
719  * {
720  * e1.call_on(&queue);
721  * e2.call();
722  *
723  * queue.dispatch(1);
724  * }
725  * @endcode
726  *
727  * @param f Function to execute when the event is dispatched
728  * @return Event that will dispatch on the specific queue
729  */
730  template <typename F, typename... ArgTs>
731  UserAllocatedEvent<F, void(ArgTs...)> make_user_allocated_event(F f, ArgTs... args);
732 
733  /** Creates an user allocated event bound to the event queue
734  * @see EventQueue::make_user_allocated_event
735  */
736  template <typename T, typename R, typename... ArgTs>
737  UserAllocatedEvent<mbed::Callback<void(ArgTs...)>, void(ArgTs...)> make_user_allocated_event(T *obj, R(T::*method)(ArgTs... args), ArgTs... args);
738 
739 
740 #else
741 
742  /** Calls an event on the queue
743  *
744  * The specified callback is executed in the context of the event
745  * queue's dispatch loop.
746  *
747  * The call function is IRQ safe and can act as a mechanism for moving
748  * events out of IRQ contexts.
749  *
750  * @param f Function to execute in the context of the dispatch loop
751  * @return A unique ID that represents the posted event and can
752  * be passed to cancel, or an ID of 0 if there is not
753  * enough memory to allocate the event.
754  * Returned ID remains valid until event has finished
755  * executing.
756  *
757  * @code
758  * #include "mbed.h"
759  *
760  * int main()
761  * {
762  * EventQueue queue;
763  *
764  * Callback<void(int)> cb(handler);
765  *
766  * // Create event on the eventqueue with a separate callback object
767  * Event<void(int)> e = queue.event(cb);
768  * e.post(1);
769  * queue.dispatch();
770  * }
771  * @endcode
772  */
773  template <typename F>
774  int call(F f)
775  {
776  void *p = equeue_alloc(&_equeue, sizeof(F));
777  if (!p) {
778  return 0;
779  }
780 
781  F *e = new (p) F(std::move(f));
782  equeue_event_dtor(e, &EventQueue::function_dtor<F>);
783  return equeue_post(&_equeue, &EventQueue::function_call<F>, e);
784  }
785 
786 
787  /** Calls an event on the queue
788  * @see EventQueue::call
789  * @param f Function to execute in the context of the dispatch loop
790  * @param args Arguments to pass to the callback
791  */
792  template <typename F, typename... ArgTs>
793  int call(F f, ArgTs... args)
794  {
795  return call(context<F, ArgTs...>(std::move(f), args...));
796  }
797 
798  /** Calls an event on the queue
799  * @see EventQueue::call
800  */
801  template <typename T, typename R, typename... ArgTs>
802  int call(T *obj, R(T::*method)(ArgTs...), ArgTs... args)
803  {
804  return call(mbed::callback(obj, method), args...);
805  }
806 
807  /** Calls an event on the queue
808  * @see EventQueue::call
809  */
810  template <typename T, typename R, typename... ArgTs>
811  int call(const T *obj, R(T::*method)(ArgTs...) const, ArgTs... args)
812  {
813  return call(mbed::callback(obj, method), args...);
814  }
815 
816  /** Calls an event on the queue
817  * @see EventQueue::call
818  */
819  template <typename T, typename R, typename... ArgTs>
820  int call(volatile T *obj, R(T::*method)(ArgTs...) volatile, ArgTs... args)
821  {
822  return call(mbed::callback(obj, method), args...);
823  }
824 
825  /** Calls an event on the queue
826  * @see EventQueue::call
827  */
828  template <typename T, typename R, typename... ArgTs>
829  int call(const volatile T *obj, R(T::*method)(ArgTs...) const volatile, ArgTs... args)
830  {
831  return call(mbed::callback(obj, method), args...);
832  }
833 
834  /** Calls an event on the queue after a specified delay
835  *
836  * The specified callback will be executed in the context of the event
837  * queue's dispatch loop.
838  *
839  * The call_in function is IRQ safe and can act as a mechanism for moving
840  * events out of IRQ contexts.
841  *
842  * @param ms Time to delay in milliseconds
843  * @param f Function to execute in the context of the dispatch loop
844  * @return A unique id that represents the posted event and can
845  * be passed to cancel, or an id of 0 if there is not
846  * enough memory to allocate the event.
847  */
848  template <typename F>
849  int call_in(duration ms, F f)
850  {
851  void *p = equeue_alloc(&_equeue, sizeof(F));
852  if (!p) {
853  return 0;
854  }
855 
856  F *e = new (p) F(std::move(f));
857  equeue_event_delay(e, ms.count());
858  equeue_event_dtor(e, &EventQueue::function_dtor<F>);
859  return equeue_post(&_equeue, &EventQueue::function_call<F>, e);
860  }
861 
862  /** Calls an event on the queue after a specified delay
863  * @see EventQueue::call_in
864  * @param ms Time to delay in milliseconds
865  * @param f Function to execute in the context of the dispatch loop
866  * @param args Arguments to pass to the callback
867  */
868  template <typename F, typename... ArgTs>
869  int call_in(duration ms, F f, ArgTs... args)
870  {
871  return call_in(ms, context<F, ArgTs...>(std::move(f), args...));
872  }
873 
874  /** Calls an event on the queue after a specified delay
875  * @see EventQueue::call_in
876  */
877  template <typename T, typename R, typename... ArgTs>
878  int call_in(duration ms, T *obj, R(T::*method)(ArgTs...), ArgTs... args)
879  {
880  return call_in(ms, mbed::callback(obj, method), args...);
881  }
882 
883  /** Calls an event on the queue after a specified delay
884  * @see EventQueue::call_in
885  */
886  template <typename T, typename R, typename... ArgTs>
887  int call_in(duration ms, const T *obj, R(T::*method)(ArgTs...) const, ArgTs... args)
888  {
889  return call_in(ms, mbed::callback(obj, method), args...);
890  }
891 
892  /** Calls an event on the queue after a specified delay
893  * @see EventQueue::call_in
894  */
895  template <typename T, typename R, typename... ArgTs>
896  int call_in(duration ms, volatile T *obj, R(T::*method)(ArgTs...) volatile, ArgTs... args)
897  {
898  return call_in(ms, mbed::callback(obj, method), args...);
899  }
900 
901  /** Calls an event on the queue after a specified delay
902  * @see EventQueue::call_in
903  */
904  template <typename T, typename R, typename... ArgTs>
905  int call_in(duration ms, const volatile T *obj, R(T::*method)(ArgTs...) const volatile, ArgTs... args)
906  {
907  return call_in(ms, mbed::callback(obj, method), args...);
908  }
909 
910  /** Calls an event on the queue after a specified delay
911  *
912  * The specified callback will be executed in the context of the event
913  * queue's dispatch loop.
914  *
915  * The call_in function is IRQ safe and can act as a mechanism for moving
916  * events out of IRQ contexts.
917  *
918  * @param ms Time to delay in milliseconds
919  * @param f Function to execute in the context of the dispatch loop
920  * @return A unique id that represents the posted event and can
921  * be passed to cancel, or an id of 0 if there is not
922  * enough memory to allocate the event.
923  */
924  template <typename F>
925  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
926  int call_in(int ms, F f)
927  {
928  return call_in(duration(ms), std::move(f));
929  }
930 
931  /** Calls an event on the queue after a specified delay
932  * @see EventQueue::call_in
933  * @param ms Time to delay in milliseconds
934  * @param f Function to execute in the context of the dispatch loop
935  * @param args Arguments to pass to the callback
936  */
937  template <typename F, typename... ArgTs>
938  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
939  int call_in(int ms, F f, ArgTs... args)
940  {
941  return call_in(duration(ms), std::move(f), args...);
942  }
943 
944  /** Calls an event on the queue after a specified delay
945  * @see EventQueue::call_in
946  */
947  template <typename T, typename R, typename... ArgTs>
948  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
949  int call_in(int ms, T *obj, R(T::*method)(ArgTs...), ArgTs... args)
950  {
951  return call_in(duration(ms), obj, method, args...);
952  }
953 
954  /** Calls an event on the queue after a specified delay
955  * @see EventQueue::call_in
956  */
957  template <typename T, typename R, typename... ArgTs>
958  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
959  int call_in(int ms, const T *obj, R(T::*method)(ArgTs...) const, ArgTs... args)
960  {
961  return call_in(duration(ms), obj, method, args...);
962  }
963 
964  /** Calls an event on the queue after a specified delay
965  * @see EventQueue::call_in
966  */
967  template <typename T, typename R, typename... ArgTs>
968  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
969  int call_in(int ms, volatile T *obj, R(T::*method)(ArgTs...) volatile, ArgTs... args)
970  {
971  return call_in(duration(ms), obj, method, args...);
972  }
973 
974  /** Calls an event on the queue after a specified delay
975  * @see EventQueue::call_in
976  */
977  template <typename T, typename R, typename... ArgTs>
978  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
979  int call_in(int ms, const volatile T *obj, R(T::*method)(ArgTs...) const volatile, ArgTs... args)
980  {
981  return call_in(duration(ms), obj, method, args...);
982  }
983 
984  /** Calls an event on the queue periodically
985  *
986  * @note The first call_every event occurs after the specified delay.
987  * To create a periodic event that fires immediately, @see Event.
988  *
989  * The specified callback will be executed in the context of the event
990  * queue's dispatch loop.
991  *
992  * The call_every function is IRQ safe and can act as a mechanism for
993  * moving events out of IRQ contexts.
994  *
995  * @param f Function to execute in the context of the dispatch loop
996  * @param ms Period of the event in milliseconds
997  * @return A unique id that represents the posted event and can
998  * be passed to cancel, or an id of 0 if there is not
999  * enough memory to allocate the event.
1000  */
1001  template <typename F>
1002  int call_every(duration ms, F f)
1003  {
1004  void *p = equeue_alloc(&_equeue, sizeof(F));
1005  if (!p) {
1006  return 0;
1007  }
1008 
1009  F *e = new (p) F(std::move(f));
1010  equeue_event_delay(e, ms.count());
1011  equeue_event_period(e, ms.count());
1012  equeue_event_dtor(e, &EventQueue::function_dtor<F>);
1013  return equeue_post(&_equeue, &EventQueue::function_call<F>, e);
1014  }
1015 
1016  /** Calls an event on the queue periodically
1017  * @see EventQueue::call_every
1018  * @param f Function to execute in the context of the dispatch loop
1019  * @param args Arguments to pass to the callback
1020  * @param ms Period of the event in milliseconds
1021  */
1022  template <typename F, typename... ArgTs>
1023  int call_every(duration ms, F f, ArgTs... args)
1024  {
1025  return call_every(ms, context<F, ArgTs...>(std::move(f), args...));
1026  }
1027 
1028  /** Calls an event on the queue periodically
1029  * @see EventQueue::call_every
1030  */
1031  template <typename T, typename R, typename... ArgTs>
1032  int call_every(duration ms, T *obj, R(T::*method)(ArgTs...), ArgTs... args)
1033  {
1034  return call_every(ms, mbed::callback(obj, method), args...);
1035  }
1036 
1037  /** Calls an event on the queue periodically
1038  * @see EventQueue::call_every
1039  */
1040  template <typename T, typename R, typename... ArgTs>
1041  int call_every(duration ms, const T *obj, R(T::*method)(ArgTs...) const, ArgTs... args)
1042  {
1043  return call_every(ms, mbed::callback(obj, method), args...);
1044  }
1045 
1046  /** Calls an event on the queue periodically
1047  * @see EventQueue::call_every
1048  */
1049  template <typename T, typename R, typename... ArgTs>
1050  int call_every(duration ms, volatile T *obj, R(T::*method)(ArgTs...) volatile, ArgTs... args)
1051  {
1052  return call_every(ms, mbed::callback(obj, method), args...);
1053  }
1054 
1055  /** Calls an event on the queue periodically
1056  * @see EventQueue::call_every
1057  */
1058  template <typename T, typename R, typename... ArgTs>
1059  int call_every(duration ms, const volatile T *obj, R(T::*method)(ArgTs...) const volatile, ArgTs... args)
1060  {
1061  return call_every(ms, mbed::callback(obj, method), args...);
1062  }
1063 
1064  /** Calls an event on the queue periodically
1065  *
1066  * @note The first call_every event occurs after the specified delay.
1067  * To create a periodic event that fires immediately, @see Event.
1068  *
1069  * The specified callback will be executed in the context of the event
1070  * queue's dispatch loop.
1071  *
1072  * The call_every function is IRQ safe and can act as a mechanism for
1073  * moving events out of IRQ contexts.
1074  *
1075  * @param f Function to execute in the context of the dispatch loop
1076  * @param ms Period of the event in milliseconds
1077  * @return A unique id that represents the posted event and can
1078  * be passed to cancel, or an id of 0 if there is not
1079  * enough memory to allocate the event.
1080  */
1081  template <typename F>
1082  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1083  int call_every(int ms, F f)
1084  {
1085  return call_every(duration(ms), std::move(f));
1086  }
1087 
1088  /** Calls an event on the queue periodically
1089  * @see EventQueue::call_every
1090  * @param f Function to execute in the context of the dispatch loop
1091  * @param args Arguments to pass to the callback
1092  * @param ms Period of the event in milliseconds
1093  */
1094  template <typename F, typename... ArgTs>
1095  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1096  int call_every(int ms, F f, ArgTs... args)
1097  {
1098  return call_every(duration(ms), std::move(f), args...);
1099  }
1100 
1101  /** Calls an event on the queue periodically
1102  * @see EventQueue::call_every
1103  */
1104  template <typename T, typename R, typename... ArgTs>
1105  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1106  int call_every(int ms, T *obj, R(T::*method)(ArgTs...), ArgTs... args)
1107  {
1108  return call_every(duration(ms), obj, method, args...);
1109  }
1110 
1111  /** Calls an event on the queue periodically
1112  * @see EventQueue::call_every
1113  */
1114  template <typename T, typename R, typename... ArgTs>
1115  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1116  int call_every(int ms, const T *obj, R(T::*method)(ArgTs...) const, ArgTs... args)
1117  {
1118  return call_every(duration(ms), obj, method, args...);
1119  }
1120 
1121  /** Calls an event on the queue periodically
1122  * @see EventQueue::call_every
1123  */
1124  template <typename T, typename R, typename... ArgTs>
1125  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1126  int call_every(int ms, volatile T *obj, R(T::*method)(ArgTs...) volatile, ArgTs... args)
1127  {
1128  return call_every(duration(ms), obj, method, args...);
1129  }
1130 
1131  /** Calls an event on the queue periodically
1132  * @see EventQueue::call_every
1133  */
1134  template <typename T, typename R, typename... ArgTs>
1135  MBED_DEPRECATED_SINCE("mbed-os-6.0.0", "Pass a chrono duration, not an integer millisecond count. For example use `5s` rather than `5000`.")
1136  int call_every(int ms, const volatile T *obj, R(T::*method)(ArgTs...) const volatile, ArgTs... args)
1137  {
1138  return call_every(duration(ms), obj, method, args...);
1139  }
1140 
1141  /** Creates an event bound to the event queue
1142  *
1143  * Constructs an event bound to the specified event queue. The specified
1144  * callback acts as the target for the event and is executed in the
1145  * context of the event queue's dispatch loop once posted.
1146  *
1147  * @param func Function to execute when the event is dispatched
1148  * @return Event that will dispatch on the specific queue
1149  */
1150  template <typename R, typename... ArgTs>
1151  Event<void(ArgTs...)> event(R(*func)(ArgTs...));
1152 
1153  /** Creates an event bound to the event queue
1154  * @see EventQueue::event
1155  */
1156  template <typename T, typename R, typename... ArgTs>
1157  Event<void(ArgTs...)> event(T *obj, R(T::*method)(ArgTs...));
1158 
1159  /** Creates an event bound to the event queue
1160  * @see EventQueue::event
1161  */
1162  template <typename T, typename R, typename... ArgTs>
1163  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(ArgTs...) const);
1164 
1165  /** Creates an event bound to the event queue
1166  * @see EventQueue::event
1167  */
1168  template <typename T, typename R, typename... ArgTs>
1169  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(ArgTs...) volatile);
1170 
1171  /** Creates an event bound to the event queue
1172  * @see EventQueue::event
1173  */
1174  template <typename T, typename R, typename... ArgTs>
1175  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(ArgTs...) const volatile);
1176 
1177  /** Creates an event bound to the event queue
1178  * @see EventQueue::event
1179  */
1180  template <typename R, typename... ArgTs>
1181  Event<void(ArgTs...)> event(mbed::Callback<R(ArgTs...)> cb);
1182 
1183  /** Creates an event bound to the event queue
1184  * @see EventQueue::event
1185  */
1186  template <typename R, typename B0, typename C0, typename... ArgTs>
1187  Event<void(ArgTs...)> event(R(*func)(B0, ArgTs...), C0 c0);
1188 
1189  /** Creates an event bound to the event queue
1190  * @see EventQueue::event
1191  */
1192  template <typename T, typename R, typename B0, typename C0, typename... ArgTs>
1193  Event<void(ArgTs...)> event(T *obj, R(T::*method)(B0, ArgTs...), C0 c0);
1194 
1195  /** Creates an event bound to the event queue
1196  * @see EventQueue::event
1197  */
1198  template <typename T, typename R, typename B0, typename C0, typename... ArgTs>
1199  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(B0, ArgTs...) const, C0 c0);
1200 
1201  /** Creates an event bound to the event queue
1202  * @see EventQueue::event
1203  */
1204  template <typename T, typename R, typename B0, typename C0, typename... ArgTs>
1205  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(B0, ArgTs...) volatile, C0 c0);
1206 
1207  /** Creates an event bound to the event queue
1208  * @see EventQueue::event
1209  */
1210  template <typename T, typename R, typename B0, typename C0, typename... ArgTs>
1211  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(B0, ArgTs...) const volatile, C0 c0);
1212 
1213  /** Creates an event bound to the event queue
1214  * @see EventQueue::event
1215  */
1216  template <typename R, typename B0, typename C0, typename... ArgTs>
1217  Event<void(ArgTs...)> event(mbed::Callback<R(B0, ArgTs...)> cb, C0 c0);
1218 
1219  /** Creates an event bound to the event queue
1220  * @see EventQueue::event
1221  */
1222  template <typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1223  Event<void(ArgTs...)> event(R(*func)(B0, B1, ArgTs...), C0 c0, C1 c1);
1224 
1225  /** Creates an event bound to the event queue
1226  * @see EventQueue::event
1227  */
1228  template <typename T, typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1229  Event<void(ArgTs...)> event(T *obj, R(T::*method)(B0, B1, ArgTs...), C0 c0, C1 c1);
1230 
1231  /** Creates an event bound to the event queue
1232  * @see EventQueue::event
1233  */
1234  template <typename T, typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1235  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(B0, B1, ArgTs...) const, C0 c0, C1 c1);
1236 
1237  /** Creates an event bound to the event queue
1238  * @see EventQueue::event
1239  */
1240  template <typename T, typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1241  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(B0, B1, ArgTs...) volatile, C0 c0, C1 c1);
1242 
1243  /** Creates an event bound to the event queue
1244  * @see EventQueue::event
1245  */
1246  template <typename T, typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1247  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(B0, B1, ArgTs...) const volatile, C0 c0, C1 c1);
1248 
1249  /** Creates an event bound to the event queue
1250  * @see EventQueue::event
1251  */
1252  template <typename R, typename B0, typename B1, typename C0, typename C1, typename... ArgTs>
1253  Event<void(ArgTs...)> event(mbed::Callback<R(B0, B1, ArgTs...)> cb, C0 c0, C1 c1);
1254 
1255  /** Creates an event bound to the event queue
1256  * @see EventQueue::event
1257  */
1258  template <typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1259  Event<void(ArgTs...)> event(R(*func)(B0, B1, B2, ArgTs...), C0 c0, C1 c1, C2 c2);
1260 
1261  /** Creates an event bound to the event queue
1262  * @see EventQueue::event
1263  */
1264  template <typename T, typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1265  Event<void(ArgTs...)> event(T *obj, R(T::*method)(B0, B1, B2, ArgTs...), C0 c0, C1 c1, C2 c2);
1266 
1267  /** Creates an event bound to the event queue
1268  * @see EventQueue::event
1269  */
1270  template <typename T, typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1271  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(B0, B1, B2, ArgTs...) const, C0 c0, C1 c1, C2 c2);
1272 
1273  /** Creates an event bound to the event queue
1274  * @see EventQueue::event
1275  */
1276  template <typename T, typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1277  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(B0, B1, B2, ArgTs...) volatile, C0 c0, C1 c1, C2 c2);
1278 
1279  /** Creates an event bound to the event queue
1280  * @see EventQueue::event
1281  */
1282  template <typename T, typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1283  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(B0, B1, B2, ArgTs...) const volatile, C0 c0, C1 c1, C2 c2);
1284 
1285  /** Creates an event bound to the event queue
1286  * @see EventQueue::event
1287  */
1288  template <typename R, typename B0, typename B1, typename B2, typename C0, typename C1, typename C2, typename... ArgTs>
1289  Event<void(ArgTs...)> event(mbed::Callback<R(B0, B1, B2, ArgTs...)> cb, C0 c0, C1 c1, C2 c2);
1290 
1291  /** Creates an event bound to the event queue
1292  * @see EventQueue::event
1293  */
1294  template <typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1295  Event<void(ArgTs...)> event(R(*func)(B0, B1, B2, B3, ArgTs...), C0 c0, C1 c1, C2 c2, C3 c3);
1296 
1297  /** Creates an event bound to the event queue
1298  * @see EventQueue::event
1299  */
1300  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1301  Event<void(ArgTs...)> event(T *obj, R(T::*method)(B0, B1, B2, B3, ArgTs...), C0 c0, C1 c1, C2 c2, C3 c3);
1302 
1303  /** Creates an event bound to the event queue
1304  * @see EventQueue::event
1305  */
1306  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1307  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(B0, B1, B2, B3, ArgTs...) const, C0 c0, C1 c1, C2 c2, C3 c3);
1308 
1309  /** Creates an event bound to the event queue
1310  * @see EventQueue::event
1311  */
1312  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1313  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(B0, B1, B2, B3, ArgTs...) volatile, C0 c0, C1 c1, C2 c2, C3 c3);
1314 
1315  /** Creates an event bound to the event queue
1316  * @see EventQueue::event
1317  */
1318  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1319  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(B0, B1, B2, B3, ArgTs...) const volatile, C0 c0, C1 c1, C2 c2, C3 c3);
1320 
1321  /** Creates an event bound to the event queue
1322  * @see EventQueue::event
1323  */
1324  template <typename R, typename B0, typename B1, typename B2, typename B3, typename C0, typename C1, typename C2, typename C3, typename... ArgTs>
1325  Event<void(ArgTs...)> event(mbed::Callback<R(B0, B1, B2, B3, ArgTs...)> cb, C0 c0, C1 c1, C2 c2, C3 c3);
1326 
1327  /** Creates an event bound to the event queue
1328  * @see EventQueue::event
1329  */
1330  template <typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1331  Event<void(ArgTs...)> event(R(*func)(B0, B1, B2, B3, B4, ArgTs...), C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1332 
1333  /** Creates an event bound to the event queue
1334  * @see EventQueue::event
1335  */
1336  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1337  Event<void(ArgTs...)> event(T *obj, R(T::*method)(B0, B1, B2, B3, B4, ArgTs...), C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1338 
1339  /** Creates an event bound to the event queue
1340  * @see EventQueue::event
1341  */
1342  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1343  Event<void(ArgTs...)> event(const T *obj, R(T::*method)(B0, B1, B2, B3, B4, ArgTs...) const, C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1344 
1345  /** Creates an event bound to the event queue
1346  * @see EventQueue::event
1347  */
1348  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1349  Event<void(ArgTs...)> event(volatile T *obj, R(T::*method)(B0, B1, B2, B3, B4, ArgTs...) volatile, C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1350 
1351  /** Creates an event bound to the event queue
1352  * @see EventQueue::event
1353  */
1354  template <typename T, typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1355  Event<void(ArgTs...)> event(const volatile T *obj, R(T::*method)(B0, B1, B2, B3, B4, ArgTs...) const volatile, C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1356 
1357  /** Creates an event bound to the event queue
1358  * @see EventQueue::event
1359  */
1360  template <typename R, typename B0, typename B1, typename B2, typename B3, typename B4, typename C0, typename C1, typename C2, typename C3, typename C4, typename... ArgTs>
1361  Event<void(ArgTs...)> event(mbed::Callback<R(B0, B1, B2, B3, B4, ArgTs...)> cb, C0 c0, C1 c1, C2 c2, C3 c3, C4 c4);
1362 
1363  /** Creates an user allocated event bound to the event queue
1364  *
1365  * Constructs an user allocated event bound to the specified event queue.
1366  * The specified callback acts as the target for the event and is executed
1367  * in the context of the event queue's dispatch loop once posted.
1368  *
1369  * @param f Function to execute when the event is dispatched
1370  * @return Event that will dispatch on the specific queue
1371  */
1372  template <typename F, typename... ArgTs>
1373  UserAllocatedEvent<F, void(ArgTs...)> make_user_allocated_event(F f, ArgTs... args);
1374 
1375  /** Creates an user allocated event bound to the event queue
1376  * @see EventQueue::make_user_allocated_event
1377  */
1378  template <typename T, typename R, typename... ArgTs>
1379  UserAllocatedEvent<mbed::Callback<void(ArgTs...)>, void(ArgTs...)> make_user_allocated_event(T *obj, R(T::*method)(ArgTs... args), ArgTs... args);
1380 
1381  /** Creates an user allocated event bound to the event queue
1382  * @see EventQueue::make_user_allocated_event
1383  */
1384  template <typename T, typename R, typename... ArgTs>
1385  UserAllocatedEvent<mbed::Callback<void(ArgTs...)>, void(ArgTs...)> make_user_allocated_event(const T *obj, R(T::*method)(ArgTs... args) const, ArgTs... args);
1386 
1387  /** Creates an user allocated event bound to the event queue
1388  * @see EventQueue::make_user_allocated_event
1389  */
1390  template <typename T, typename R, typename... ArgTs>
1391  UserAllocatedEvent<mbed::Callback<void(ArgTs...)>, void(ArgTs...)> make_user_allocated_event(volatile T *obj, R(T::*method)(ArgTs... args) volatile, ArgTs... args);
1392 
1393  /** Creates an user allocated event bound to the event queue
1394  * @see EventQueue::make_user_allocated_event
1395  */
1396  template <typename T, typename R, typename... ArgTs>
1397  UserAllocatedEvent<mbed::Callback<void(ArgTs...)>, void(ArgTs...)> make_user_allocated_event(const volatile T *obj, R(T::*method)(ArgTs... args) const volatile, ArgTs... args);
1398 #endif
1399 
1400 protected:
1401 #if !defined(DOXYGEN_ONLY)
1402  template <typename F>
1403  friend class Event;
1404  template <typename F, typename A>
1405  friend class UserAllocatedEvent;
1406  struct equeue _equeue;
1407  mbed::Callback<void(int)> _update;
1408 
1409  // Function attributes
1410  template <typename F>
1411  static void function_call(void *p)
1412  {
1413  (*(F *)p)();
1414  }
1415 
1416  template <typename F>
1417  static void function_dtor(void *p)
1418  {
1419  ((F *)p)->~F();
1420  }
1421 
1422  // Context structures
1423  template <typename F, typename... ContextArgTs>
1424  struct context;
1425 
1426  template <typename F>
1427  struct context<F> {
1428  F f;
1429 
1430  constexpr context(F f)
1431  : f(f) {}
1432 
1433  template <typename... ArgTs>
1434  void operator()(ArgTs... args)
1435  {
1436  f(args...);
1437  }
1438  };
1439 
1440  template <typename F, typename C0>
1441  struct context<F, C0> {
1442  F f;
1443  C0 c0;
1444 
1445  constexpr context(F f, C0 c0)
1446  : f(f), c0(c0) {}
1447 
1448  template <typename... ArgTs>
1449  void operator()(ArgTs... args)
1450  {
1451  f(c0, args...);
1452  }
1453  };
1454 
1455  template <typename F, typename C0, typename C1>
1456  struct context<F, C0, C1> {
1457  F f;
1458  C0 c0;
1459  C1 c1;
1460 
1461  constexpr context(F f, C0 c0, C1 c1)
1462  : f(f), c0(c0), c1(c1) {}
1463 
1464  template <typename... ArgTs>
1465  void operator()(ArgTs... args)
1466  {
1467  f(c0, c1, args...);
1468  }
1469  };
1470 
1471  template <typename F, typename C0, typename C1, typename C2>
1472  struct context<F, C0, C1, C2> {
1473  F f;
1474  C0 c0;
1475  C1 c1;
1476  C2 c2;
1477 
1478  constexpr context(F f, C0 c0, C1 c1, C2 c2)
1479  : f(f), c0(c0), c1(c1), c2(c2) {}
1480 
1481  template <typename... ArgTs>
1482  void operator()(ArgTs... args)
1483  {
1484  f(c0, c1, c2, args...);
1485  }
1486  };
1487 
1488  template <typename F, typename C0, typename C1, typename C2, typename C3>
1489  struct context<F, C0, C1, C2, C3> {
1490  F f;
1491  C0 c0;
1492  C1 c1;
1493  C2 c2;
1494  C3 c3;
1495 
1496  constexpr context(F f, C0 c0, C1 c1, C2 c2, C3 c3)
1497  : f(f), c0(c0), c1(c1), c2(c2), c3(c3) {}
1498 
1499  template <typename... ArgTs>
1500  void operator()(ArgTs... args)
1501  {
1502  f(c0, c1, c2, c3, args...);
1503  }
1504  };
1505 
1506  template <typename F, typename C0, typename C1, typename C2, typename C3, typename C4>
1507  struct context<F, C0, C1, C2, C3, C4> {
1508  F f;
1509  C0 c0;
1510  C1 c1;
1511  C2 c2;
1512  C3 c3;
1513  C4 c4;
1514 
1515  constexpr context(F f, C0 c0, C1 c1, C2 c2, C3 c3, C4 c4)
1516  : f(f), c0(c0), c1(c1), c2(c2), c3(c3), c4(c4) {}
1517 
1518  template <typename... ArgTs>
1519  void operator()(ArgTs... args)
1520  {
1521  f(c0, c1, c2, c3, c4, args...);
1522  }
1523  };
1524 #endif //!defined(DOXYGEN_ONLY)
1525 };
1526 
1527 /** @}*/
1528 /** @}*/
1529 
1530 }
1531 
1532 #endif
events::EventQueue::dispatch_forever
void dispatch_forever()
Dispatch events without a timeout.
events::EventQueue::time_left
int time_left(int id)
Query how much time is left for delayed event.
events::EventQueue::break_dispatch
void break_dispatch()
Break out of a running event loop.
events::EventQueue::dispatch_once
void dispatch_once()
Dispatch currently queued events only and then terminate.
events::EventQueue
EventQueue.
Definition: EventQueue.h:62
events::EventQueue::call_every
int call_every(duration ms, F f, ArgTs...args)
Calls an event on the queue periodically.
events::Event
Event.
Definition: Event.h:38
events::EventQueue::chain
int chain(EventQueue *target)
Chain an event queue onto another event queue.
events::EventQueue::cancel
bool cancel(UserAllocatedEvent< F, A > *event)
Cancel an in-flight user allocated event.
Definition: EventQueue.h:195
mbed::NonCopyable
Prevents generation of copy constructor and copy assignment operator in derived classes.
Definition: NonCopyable.h:162
mbed::callback
Callback< R(ArgTs...)> callback(R(*func)(ArgTs...)=nullptr) noexcept
Create a callback class with type inferred from the arguments.
Definition: Callback.h:678
events::EventQueue::make_user_allocated_event
UserAllocatedEvent< F, void(ArgTs...)> make_user_allocated_event(F f, ArgTs...args)
Creates an user allocated event bound to the event queue.
Definition: UserAllocatedEvent.h:359
events::EventQueue::tick
unsigned tick()
Millisecond counter.
equeue
Definition: equeue.h:61
events::EventQueue::cancel
bool cancel(int id)
Cancel an in-flight event.
events::EventQueue::call_in
int call_in(duration ms, F f, ArgTs...args)
Calls an event on the queue after a specified delay.
events::EventQueue::background
void background(mbed::Callback< void(int)> update)
Background an event queue onto a single-shot timer-interrupt.
events::EventQueue::dispatch_for
void dispatch_for(duration ms)
Dispatch events.
events::EventQueue::call
int call(F f, Args...args)
Calls an event on the queue.
events::EventQueue::event
Event< void(ArgTs...)> event(R(*func)(BoundArgTs..., ArgTs...), ContextArgTs...context_args)
Creates an event bound to the event queue.
events::EventQueue::~EventQueue
~EventQueue()
Destroy an EventQueue.
events::EventQueue::EventQueue
EventQueue(unsigned size=(32 *(EQUEUE_EVENT_SIZE-2 *sizeof(void *)+sizeof(mbed::Callback< void()>))), unsigned char *buffer=NULL)
Create an EventQueue.
events::EventQueue::time_left
int time_left(UserAllocatedEvent< F, A > *event)
Query how much time is left for delayed UserAllocatedEvent.
Definition: EventQueue.h:241
mbed::Callback
Callback class based on template specialization.
Definition: Callback.h:53
EVENTS_QUEUE_SIZE
#define EVENTS_QUEUE_SIZE
EVENTS_QUEUE_SIZE Default size of buffer for events.
Definition: EventQueue.h:45
events::EventQueue::dispatch
void dispatch(int ms=-1)
Dispatch events.
MBED_DEPRECATED_SINCE
#define MBED_DEPRECATED_SINCE(D, M)
MBED_DEPRECATED("message string") Mark a function declaration as deprecated, if it used then a warnin...
Definition: mbed_toolchain.h:429
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