AlexaClientSDK  1.26.0
A cross-platform, modular SDK for interacting with the Alexa Voice Service
Public Member Functions | List of all members
alexaClientSDK::avsCommon::utils::timing::TimerDelegate Class Reference

#include <TimerDelegate.h>

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Public Member Functions

 TimerDelegate ()
 Constructor. More...
 
 ~TimerDelegate () override
 Destructor. More...
 
TimerDelegateInterface Functions
void start (std::chrono::nanoseconds delay, std::chrono::nanoseconds period, PeriodType periodType, size_t maxCount, std::function< void()> task) override
 
void stop () override
 
bool activate () override
 
bool isActive () const override
 
- Public Member Functions inherited from alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface
virtual ~TimerDelegateInterface ()=default
 Destructor. More...
 

Additional Inherited Members

- Public Types inherited from alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface
enum  PeriodType { PeriodType::ABSOLUTE, PeriodType::RELATIVE }
 Specifies different ways to apply the period of a recurring task. More...
 
- Static Public Member Functions inherited from alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface
static size_t getForever ()
 Static member function to get FOREVER. More...
 
- Static Public Attributes inherited from alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface
static const size_t FOREVER = 0
 

Constructor & Destructor Documentation

◆ TimerDelegate()

alexaClientSDK::avsCommon::utils::timing::TimerDelegate::TimerDelegate ( )

Constructor.

◆ ~TimerDelegate()

alexaClientSDK::avsCommon::utils::timing::TimerDelegate::~TimerDelegate ( )
override

Destructor.

Member Function Documentation

◆ activate()

bool alexaClientSDK::avsCommon::utils::timing::TimerDelegate::activate ( )
overridevirtual

Marks this TimerDelegateInterface as active for strict ordering purposes. When called, the implementation must atomically set the internal state as active. Functionally this method must behave as an std::atomic_exchange operation.

Returns
true if the Timer was previously inactive, else false.

Implements alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface.

◆ isActive()

bool alexaClientSDK::avsCommon::utils::timing::TimerDelegate::isActive ( ) const
overridevirtual

Reports whether the TimerDelegateInterface is active. A timer is considered active if it is waiting to start a call to the task, or if a call to the task is in progress. Examples of these can be after calls to activate() or start(). A timer is only considered inactive if it has not been started, if all requested/scheduled calls to the task have completed, or after a call to stop().

Returns
true if the Timer is active, else false.

Implements alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface.

◆ start()

void alexaClientSDK::avsCommon::utils::timing::TimerDelegate::start ( std::chrono::nanoseconds  delay,
std::chrono::nanoseconds  period,
PeriodType  periodType,
size_t  maxCount,
std::function< void()>  task 
)
overridevirtual

Waits for the delay, then calls task periodically.

Parameters
delayThe non-negative time to wait before making the first task call.
periodThe non-negative time to wait between subsequent task calls.
periodTypeThe type of period to use when making subsequent task calls.
maxCountThe desired number of times to call task. TimerDelegateInterface::getForever() means to call forever until stop() is called. Note that fewer than maxCount calls may occur if periodType is PeriodType::ABSOLUTE and the task runtime exceeds period.
taskA callable type representing a task.

Implements alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface.

◆ stop()

void alexaClientSDK::avsCommon::utils::timing::TimerDelegate::stop ( )
overridevirtual

Stops the TimerDelegateInterface (if running). This should not interrupt an active call to the task, but will prevent any subequent calls to the task. If stop() is called while the task is executing, this function will block until the task completes.

Note
In the special case that stop() is called from inside the task function, stop() will still prevent any subsequent calls to the task, but will not block as described above.

Implements alexaClientSDK::avsCommon::sdkInterfaces::timing::TimerDelegateInterface.


The documentation for this class was generated from the following files:

AlexaClientSDK 1.26.0 - Copyright 2016-2021 Amazon.com, Inc. or its affiliates. All Rights Reserved. Licensed under the Apache License, Version 2.0