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