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// Copyright Sebastian Jeckel 2014.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef REACT_DOMAIN_H_INCLUDED
#define REACT_DOMAIN_H_INCLUDED
#pragma once
#include "react/detail/Defs.h"
#include <memory>
#include <utility>
#include "react/detail/DomainBase.h"
#include "react/detail/ReactiveInput.h"
#include "react/detail/graph/ContinuationNodes.h"
#include "react/Forward.h"
#ifdef REACT_ENABLE_LOGGING
#include "react/logging/EventLog.h"
#include "react/logging/EventRecords.h"
#endif //REACT_ENABLE_LOGGING
/*****************************************/ REACT_BEGIN /*****************************************/
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Common types & constants
///////////////////////////////////////////////////////////////////////////////////////////////////
using REACT_IMPL::TransactionFlagsT;
// ETransactionFlags
using REACT_IMPL::ETransactionFlags;
using REACT_IMPL::allow_merging;
#ifdef REACT_ENABLE_LOGGING
using REACT_IMPL::EventLog;
#endif //REACT_ENABLE_LOGGING
// Domain modes
using REACT_IMPL::EDomainMode;
using REACT_IMPL::sequential;
using REACT_IMPL::sequential_concurrent;
using REACT_IMPL::parallel;
using REACT_IMPL::parallel_concurrent;
// Expose enum type so aliases for engines can be declared, but don't
// expose the actual enum values as they are reserved for internal use.
using REACT_IMPL::EPropagationMode;
using REACT_IMPL::WeightHint;
///////////////////////////////////////////////////////////////////////////////////////////////////
/// TransactionStatus
///////////////////////////////////////////////////////////////////////////////////////////////////
class TransactionStatus
{
using StateT = REACT_IMPL::SharedWaitingState;
using PtrT = REACT_IMPL::WaitingStatePtrT;
public:
// Default ctor
inline TransactionStatus() :
statePtr_( StateT::Create() )
{}
// Move ctor
inline TransactionStatus(TransactionStatus&& other) :
statePtr_( std::move(other.statePtr_) )
{
other.statePtr_ = StateT::Create();
}
// Move assignment
inline TransactionStatus& operator=(TransactionStatus&& other)
{
if (this != &other)
{
statePtr_ = std::move(other.statePtr_);
other.statePtr_ = StateT::Create();
}
return *this;
}
// Deleted copy ctor & assignment
TransactionStatus(const TransactionStatus&) = delete;
TransactionStatus& operator=(const TransactionStatus&) = delete;
inline void Wait()
{
assert(statePtr_.Get() != nullptr);
statePtr_->Wait();
}
private:
PtrT statePtr_;
template <typename D, typename F>
friend void AsyncTransaction(TransactionStatus& status, F&& func);
template <typename D, typename F>
friend void AsyncTransaction(TransactionFlagsT flags, TransactionStatus& status, F&& func);
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Continuation
///////////////////////////////////////////////////////////////////////////////////////////////////
template
<
typename D,
typename D2 = D
>
class Continuation : public REACT_IMPL::ContinuationBase<D,D2>
{
private:
using NodePtrT = REACT_IMPL::NodeBasePtrT<D>;
public:
using SourceDomainT = D;
using TargetDomainT = D2;
// Default ctor
Continuation() = default;
// Move ctor
Continuation(Continuation&& other) :
Continuation::ContinuationBase( std::move(other) )
{}
// Node ctor
explicit Continuation(NodePtrT&& nodePtr) :
Continuation::ContinuationBase( std::move(nodePtr) )
{}
// Move assignment
Continuation& operator=(Continuation&& other)
{
Continuation::ContinuationBase::operator=( std::move(other) );
return *this;
}
// Deleted copy ctor & assignment
Continuation(const Continuation&) = delete;
Continuation& operator=(const Continuation&) = delete;
};
///////////////////////////////////////////////////////////////////////////////////////////////////
/// MakeContinuation - Signals
///////////////////////////////////////////////////////////////////////////////////////////////////
template
<
typename D,
typename DOut = D,
typename S,
typename FIn
>
auto MakeContinuation(TransactionFlagsT flags, const Signal<D,S>& trigger, FIn&& func)
-> Continuation<D,DOut>
{
static_assert(DOut::is_concurrent,
"MakeContinuation: Target domain does not support concurrent input.");
using REACT_IMPL::SignalContinuationNode;
using F = typename std::decay<FIn>::type;
return Continuation<D,DOut>(
std::make_shared<SignalContinuationNode<D,DOut,S,F>>(
flags, GetNodePtr(trigger), std::forward<FIn>(func)));
}
template
<
typename D,
typename DOut = D,
typename S,
typename FIn
>
auto MakeContinuation(const Signal<D,S>& trigger, FIn&& func)
-> Continuation<D,DOut>
{
return MakeContinuation<D,DOut>(0, trigger, std::forward<FIn>(func));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
/// MakeContinuation - Events
///////////////////////////////////////////////////////////////////////////////////////////////////
template
<
typename D,
typename DOut = D,
typename E,
typename FIn
>
auto MakeContinuation(TransactionFlagsT flags, const Events<D,E>& trigger, FIn&& func)
-> Continuation<D,DOut>
{
static_assert(DOut::is_concurrent,
"MakeContinuation: Target domain does not support concurrent input.");
using REACT_IMPL::EventContinuationNode;
using REACT_IMPL::AddContinuationRangeWrapper;
using REACT_IMPL::IsCallableWith;
using REACT_IMPL::EventRange;
using F = typename std::decay<FIn>::type;
using WrapperT =
typename std::conditional<
IsCallableWith<F,void, EventRange<E>>::value,
F,
typename std::conditional<
IsCallableWith<F, void, E>::value,
AddContinuationRangeWrapper<E, F>,
void
>::type
>::type;
static_assert(! std::is_same<WrapperT,void>::value,
"MakeContinuation: Passed function does not match any of the supported signatures.");
return Continuation<D,DOut>(
std::make_shared<EventContinuationNode<D,DOut,E,WrapperT>>(
flags, GetNodePtr(trigger), std::forward<FIn>(func)));
}
template
<
typename D,
typename DOut = D,
typename E,
typename FIn
>
auto MakeContinuation(const Events<D,E>& trigger, FIn&& func)
-> Continuation<D,DOut>
{
return MakeContinuation<D,DOut>(0, trigger, std::forward<FIn>(func));
}
///////////////////////////////////////////////////////////////////////////////////////////////////
/// MakeContinuation - Synced
///////////////////////////////////////////////////////////////////////////////////////////////////
template
<
typename D,
typename DOut = D,
typename E,
typename FIn,
typename ... TDepValues
>
auto MakeContinuation(TransactionFlagsT flags, const Events<D,E>& trigger,
const SignalPack<TDepValues...>& depPack, FIn&& func)
-> Continuation<D,DOut>
{
static_assert(DOut::is_concurrent,
"MakeContinuation: Target domain does not support concurrent input.");
using REACT_IMPL::SyncedContinuationNode;
using REACT_IMPL::AddContinuationRangeWrapper;
using REACT_IMPL::IsCallableWith;
using REACT_IMPL::EventRange;
using F = typename std::decay<FIn>::type;
using WrapperT =
typename std::conditional<
IsCallableWith<F, void, EventRange<E>, TDepValues ...>::value,
F,
typename std::conditional<
IsCallableWith<F, void, E, TDepValues ...>::value,
AddContinuationRangeWrapper<E, F, TDepValues ...>,
void
>::type
>::type;
static_assert(! std::is_same<WrapperT,void>::value,
"MakeContinuation: Passed function does not match any of the supported signatures.");
struct NodeBuilder_
{
NodeBuilder_(TransactionFlagsT flags, const Events<D,E>& trigger, FIn&& func) :
MyFlags( flags ),
MyTrigger( trigger ),
MyFunc( std::forward<FIn>(func) )
{}
auto operator()(const Signal<D,TDepValues>& ... deps)
-> Continuation<D,DOut>
{
return Continuation<D,DOut>(
std::make_shared<SyncedContinuationNode<D,DOut,E,WrapperT,TDepValues...>>(
MyFlags,
GetNodePtr(MyTrigger),
std::forward<FIn>(MyFunc), GetNodePtr(deps) ...));
}
TransactionFlagsT MyFlags;
const Events<D,E>& MyTrigger;
FIn MyFunc;
};
return REACT_IMPL::apply(
NodeBuilder_( flags, trigger, std::forward<FIn>(func) ),
depPack.Data);
}
template
<
typename D,
typename DOut = D,
typename E,
typename FIn,
typename ... TDepValues
>
auto MakeContinuation(const Events<D,E>& trigger,
const SignalPack<TDepValues...>& depPack, FIn&& func)
-> Continuation<D,DOut>
{
return MakeContinuation<D,DOut>(0, trigger, depPack, std::forward<FIn>(func));
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// DoTransaction
///////////////////////////////////////////////////////////////////////////////////////////////
template <typename D, typename F>
void DoTransaction(F&& func)
{
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance().DoTransaction(0, std::forward<F>(func));
}
template <typename D, typename F>
void DoTransaction(TransactionFlagsT flags, F&& func)
{
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance().DoTransaction(flags, std::forward<F>(func));
}
///////////////////////////////////////////////////////////////////////////////////////////////
/// AsyncTransaction
///////////////////////////////////////////////////////////////////////////////////////////////
template <typename D, typename F>
void AsyncTransaction(F&& func)
{
static_assert(D::is_concurrent,
"AsyncTransaction: Domain does not support concurrent input.");
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance()
.AsyncTransaction(0, nullptr, std::forward<F>(func));
}
template <typename D, typename F>
void AsyncTransaction(TransactionFlagsT flags, F&& func)
{
static_assert(D::is_concurrent,
"AsyncTransaction: Domain does not support concurrent input.");
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance()
.AsyncTransaction(flags, nullptr, std::forward<F>(func));
}
template <typename D, typename F>
void AsyncTransaction(TransactionStatus& status, F&& func)
{
static_assert(D::is_concurrent,
"AsyncTransaction: Domain does not support concurrent input.");
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance()
.AsyncTransaction(0, status.statePtr_, std::forward<F>(func));
}
template <typename D, typename F>
void AsyncTransaction(TransactionFlagsT flags, TransactionStatus& status, F&& func)
{
static_assert(D::is_concurrent,
"AsyncTransaction: Domain does not support concurrent input.");
using REACT_IMPL::DomainSpecificInputManager;
DomainSpecificInputManager<D>::Instance()
.AsyncTransaction(flags, status.statePtr_, std::forward<F>(func));
}
/******************************************/ REACT_END /******************************************/
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Domain definition macro
///////////////////////////////////////////////////////////////////////////////////////////////////
#define REACTIVE_DOMAIN(name, ...) \
struct name : \
public REACT_IMPL::DomainBase<name, REACT_IMPL::DomainPolicy< __VA_ARGS__ >> {}; \
static REACT_IMPL::DomainInitializer<name> name ## _initializer_;
/*
A brief reminder why the domain initializer is here:
Each domain has a couple of singletons (debug log, engine, input manager) which are
currently implemented as meyer singletons. From what I understand, these are thread-safe
in C++11, but not all compilers implement that yet. That's why a static initializer has
been added to make sure singleton creation happens before any multi-threaded access.
This implemenation is obviously inconsequential.
*/
///////////////////////////////////////////////////////////////////////////////////////////////////
/// Define type aliases for given domain
///////////////////////////////////////////////////////////////////////////////////////////////////
#define USING_REACTIVE_DOMAIN(name) \
template <typename S> \
using SignalT = Signal<name,S>; \
\
template <typename S> \
using VarSignalT = VarSignal<name,S>; \
\
template <typename E = Token> \
using EventsT = Events<name,E>; \
\
template <typename E = Token> \
using EventSourceT = EventSource<name,E>; \
\
using ObserverT = Observer<name>; \
\
using ScopedObserverT = ScopedObserver<name>; \
\
using ReactorT = Reactor<name>;
#endif // REACT_DOMAIN_H_INCLUDED