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62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
#include "FunctionThread.h"
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#include "DS_List.h"
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class InlineFunctorProcessor;
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/// A base class to derive functors from for the InlineFunctorProcessor system
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class InlineFunctor : public RakNet::Functor
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{
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protected:
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/// \internal - Calls InlineFunctorProcessor to signal that the functor is done
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virtual void HandleResult(bool wasCancelled, void *context);
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/// Tracks the call depth when this functor was pushed. It allows the system to return from functions in the correct order
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int callDepth;
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/// Pointer to the calling instance of InlineFunctorProcessor
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InlineFunctorProcessor *ifp;
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friend class InlineFunctorProcessor;
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};
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/// A base class that will allow you to call YieldOnFunctor() from within a function, and continue with that function when the asynchronous processing has completed
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class InlineFunctorProcessor
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{
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public:
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InlineFunctorProcessor();
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~InlineFunctorProcessor();
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/// Start the threads. Should call this first
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/// \param[in] numThreads How many worker threads to start
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/// \note If only one thread is started, then the calls to YieldOnFunctor will process in that order
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void StartThreads(int numThreads);
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/// Stop the threads
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/// \param[in] blockOnCurrentProcessing Wait for the current processing to finish?
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void StopThreads(bool blockOnCurrentProcessing);
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/// Yield processing in the current function, continuing with the function implemented by CallYieldFunction
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/// When the functor completes, this function will return and the caller will continue processing
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/// \param[in] inlineFunctor A class that implements Functor::Process() to perform processing that can work asynchronously, such as loading a file or doing a database call
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void YieldOnFunctor(InlineFunctor *inlineFunctor);
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/// \internal
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/// If the functor is done, continue processing the caller
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/// \return True if the topmost functor has completed, false otherwise
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bool UpdateIFP(void);
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/// \internal
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/// Notify the caller that the functor is done
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void Pop(int threadCallDepth);
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protected:
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/// Returns the number of functors that were passed to the system
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unsigned GetCallDepth(void) const;
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/// Used to create a thread that processes functors
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RakNet::FunctionThread functionThread;
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/// Tracks which threads have been completed
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DataStructures::List<bool> completedThreads;
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};
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