proxygen: folly::observer::SimpleObservable< T

#include <SimpleObservable.h>

Classes
struct	Context

struct	Wrapper

Public Member Functions
	SimpleObservable (T value)

	SimpleObservable (std::shared_ptr< const T > value)

void	setValue (T value)

void	setValue (std::shared_ptr< const T > value)

Observer< T >	getObserver ()

Private Attributes
std::shared_ptr< Context >	context_

std::once_flag	observerInit_

folly::Optional< Observer< T > >	observer_

Detailed Description

template<typename T>
class folly::observer::SimpleObservable< T >

Definition at line 26 of file SimpleObservable.h.

Constructor & Destructor Documentation

template<typename T >

folly::observer::SimpleObservable< T >::SimpleObservable ( T value )

explicit

Definition at line 24 of file SimpleObservable-inl.h.

References folly::gen::move, and folly::observer::SimpleObservable< T >::setValue().

     : context_(std::make_shared<Context>()) {
   setValue(std::move(value));
 }

template<typename T >

folly::observer::SimpleObservable< T >::SimpleObservable ( std::shared_ptr< const T > value )

explicit

Definition at line 30 of file SimpleObservable-inl.h.

References folly::gen::move, and folly::observer::SimpleObservable< T >::setValue().

     : context_(std::make_shared<Context>()) {
   setValue(std::move(value));
 }

Member Function Documentation

template<typename T >

Observer< T > folly::observer::SimpleObservable< T >::getObserver ( )

Definition at line 72 of file SimpleObservable-inl.h.

References folly::call_once(), folly::observer::SimpleObservable< T >::Wrapper< T >::context, folly::observer::SimpleObservable< T >::context_, folly::gen::move, folly::observer::SimpleObservable< T >::observer_, and folly::observer::SimpleObservable< T >::observerInit_.

Referenced by TEST().

                                              {
   std::call_once(observerInit_, [&]() {
     SimpleObservable<T>::Wrapper wrapper;
     wrapper.context = context_;
     ObserverCreator<SimpleObservable<T>::Wrapper> creator(std::move(wrapper));
     observer_ = std::move(creator).getObserver();
   });
   return *observer_;
 }

template<typename T >

void folly::observer::SimpleObservable< T >::setValue ( T value )

Definition at line 36 of file SimpleObservable-inl.h.

References folly::gen::move.

Referenced by folly::observer::SimpleObservable< T >::SimpleObservable(), and TEST().

                                           {
   setValue(std::make_shared<const T>(std::move(value)));
 }

template<typename T >

void folly::observer::SimpleObservable< T >::setValue ( std::shared_ptr< const T > value )

Definition at line 41 of file SimpleObservable-inl.h.

References folly::observer::SimpleObservable< T >::context_.

                                                                {
   context_->value_.swap(value);
 
   context_->callback_.withWLock([](folly::Function<void()>& callback) {
     if (callback) {
       callback();
     }
   });
 }