69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
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// IsThread.h
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// Interfaces to the cIsThread class representing an OS-independent wrapper for a class that implements a thread.
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// This class will eventually suupersede the old cThread class
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/*
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Usage:
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To have a new thread, declare a class descending from cIsClass.
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Then override its Execute() method to provide your thread processing.
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In the descending class' constructor call the Start() method to start the thread once you're finished with initialization.
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*/
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#pragma once
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class cIsThread
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{
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protected:
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/** This is the main thread entrypoint.
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This function, overloaded by the descendants, is called in the new thread. */
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virtual void Execute(void) = 0;
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/** The overriden Execute() method should check this value periodically and terminate if this is true. */
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std::atomic<bool> m_ShouldTerminate;
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public:
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cIsThread(AString && a_ThreadName);
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virtual ~cIsThread();
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/** Starts the thread; returns without waiting for the actual start. */
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bool Start(void);
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/** Signals the thread to terminate and waits until it's finished. */
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void Stop(void);
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/** Waits for the thread to finish. Doesn't signalize the ShouldTerminate flag. */
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bool Wait(void);
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/** Returns true if the thread calling this function is the thread contained within this object. */
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bool IsCurrentThread(void) const { return std::this_thread::get_id() == m_Thread.get_id(); }
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private:
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/** The name of the thread, used to aid debugging in IDEs which support named threads */
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AString m_ThreadName;
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/** The thread object which holds the created thread for later manipulation */
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std::thread m_Thread;
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/** The event that is used to wait with the thread's execution until the thread object is fully initialized.
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This prevents the IsCurrentThread() call to fail because of a race-condition where the thread starts before m_Thread has been fully assigned. */
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cEvent m_evtStart;
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/** Wrapper for Execute() that waits for the initialization event, to prevent race conditions in thread initialization. */
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void DoExecute(void);
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} ;
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