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callback_timer_deferred_locked.h
/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2025 John Wellbelove
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#ifndef ETL_CALLBACK_TIMER_DEFERRED_LOCKED_INCLUDED
#define ETL_CALLBACK_TIMER_DEFERRED_LOCKED_INCLUDED
#include "platform.h"
#include "callback_timer_locked.h"
#include "delegate.h"
#include "etl/nullptr.h"
#include "etl/optional.h"
#include "priority_queue.h"
namespace etl
{
//***************************************************************************
//***************************************************************************
template <uint_least8_t Max_Timers_, uint32_t Max_Handlers_>
class callback_timer_deferred_locked : public etl::icallback_timer_locked
{
public:
ETL_STATIC_ASSERT(Max_Timers_ <= 254U, "No more than 254 timers are allowed");
typedef icallback_timer_locked::callback_type callback_type;
typedef icallback_timer_locked::try_lock_type try_lock_type;
typedef icallback_timer_locked::lock_type lock_type;
typedef icallback_timer_locked::unlock_type unlock_type;
private:
typedef icallback_timer_locked::callback_node callback_node;
public:
//*******************************************
//*******************************************
callback_timer_deferred_locked()
: icallback_timer_locked(timer_array, Max_Timers_)
{
}
//*******************************************
//*******************************************
callback_timer_deferred_locked(try_lock_type try_lock_, lock_type lock_, unlock_type unlock_)
: icallback_timer_locked(timer_array, Max_Timers_)
{
this->set_locks(try_lock_, lock_, unlock_);
}
//*******************************************
//*******************************************
bool tick(uint32_t count) ETL_FINAL
{
if (enabled)
{
if (try_lock())
{
// We have something to do?
bool has_active = !active_list.empty();
if (has_active)
{
while (has_active && (count >= active_list.front().delta))
{
timer_data& timer = active_list.front();
count -= timer.delta;
active_list.remove(timer.id, true);
remove_callback.call_if(timer.id);
if (timer.callback.is_valid())
{
if (!handler_queue.full())
{
handler_queue.push(callback_node(timer.callback, timer_priorities[timer.id]));
}
}
if (timer.repeating)
{
// Reinsert the timer.
timer.delta = timer.period;
active_list.insert(timer.id);
insert_callback.call_if(timer.id);
}
has_active = !active_list.empty();
}
if (has_active)
{
// Subtract any remainder from the next due timeout.
active_list.front().delta -= count;
}
}
unlock();
return true;
}
}
return false;
}
//*******************************************
//*******************************************
void handle_deferred(void)
{
callback_type work_todo_callback;
do {
lock();
if (handler_queue.empty())
{
work_todo_callback.clear();
}
else
{
callback_node& work_todo_callback_node = handler_queue.top();
work_todo_callback = work_todo_callback_node.callback;
handler_queue.pop();
}
unlock();
work_todo_callback.call_if();
} while (work_todo_callback.is_valid());
}
// Overloads
//*******************************************
//*******************************************
etl::timer::id::type register_timer(const callback_type& callback_, uint32_t period_, bool repeating_)
{
return register_timer(callback_, period_, repeating_, 0);
}
//*******************************************
//*******************************************
etl::timer::id::type register_timer(const callback_type& callback_, uint32_t period_, bool repeating_, uint_least8_t priority_)
{
etl::timer::id::type id = icallback_timer_locked::register_timer(callback_, period_, repeating_);
if (id != etl::timer::id::NO_TIMER)
{
timer_priorities[id] = priority_;
}
return id;
}
private:
priority_queue<callback_node, Max_Handlers_> handler_queue;
uint_least8_t timer_priorities[Max_Timers_];
timer_data timer_array[Max_Timers_];
};
} // namespace etl
#endif
etl::callback_timer_deferred_locked::handle_deferred
void handle_deferred(void)
Definition callback_timer_deferred_locked.h:142
etl::callback_timer_deferred_locked::tick
bool tick(uint32_t count) ETL_FINAL
Handle the tick call.
Definition callback_timer_deferred_locked.h:82
etl::callback_timer_deferred_locked::callback_timer_deferred_locked
callback_timer_deferred_locked()
Constructor.
Definition callback_timer_deferred_locked.h:65
etl::callback_timer_deferred_locked::callback_timer_deferred_locked
callback_timer_deferred_locked(try_lock_type try_lock_, lock_type lock_, unlock_type unlock_)
Constructor.
Definition callback_timer_deferred_locked.h:73
etl::callback_timer_deferred_locked::register_timer
etl::timer::id::type register_timer(const callback_type &callback_, uint32_t period_, bool repeating_, uint_least8_t priority_)
Definition callback_timer_deferred_locked.h:182
etl::callback_timer_deferred_locked::register_timer
etl::timer::id::type register_timer(const callback_type &callback_, uint32_t period_, bool repeating_)
Register a timer.
Definition callback_timer_deferred_locked.h:171
etl::icallback_timer_locked::callback_node
Definition callback_timer_locked.h:357
etl::icallback_timer_locked
Interface for callback timer.
Definition callback_timer_locked.h:48
etl::icallback_timer_locked::icallback_timer_locked
icallback_timer_locked(timer_data *const timer_array_, const uint_least8_t Max_Timers_)
Constructor.
Definition callback_timer_locked.h:440
etl::icallback_timer_locked::set_locks
void set_locks(try_lock_type try_lock_, lock_type lock_, lock_type unlock_)
Sets the lock and unlock delegates.
Definition callback_timer_locked.h:260
etl::icallback_timer_locked::register_timer
etl::timer::id::type register_timer(const callback_type &callback_, uint32_t period_, bool repeating_)
Register a timer.
Definition callback_timer_locked.h:61
etl::priority_queue
Definition priority_queue.h:527
delegate.h
etl::ETL_FINAL
Definition circular_iterator.h:599
etl
Definition absolute.h:40
nullptr.h
optional.h
platform.h
priority_queue.h
etl::icallback_timer_locked::timer_data
The configuration of a timer.
Definition callback_timer_locked.h:379
etl::timer::id
Definition timer.h:88
etl::timer
Common definitions for the timer framework.
Definition timer.h:55