46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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#ifndef IEVENTQUEUE_H
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#define IEVENTQUEUE_H
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#define CEQ (IEventQueue::getInstance())
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class CEvent;
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class IEventQueue {
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public:
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IEventQueue();
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virtual ~IEventQueue();
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// note -- all of the methods in an IEventQueue subclass for a
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// platform must be thread safe if it will be used by multiple
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// threads simultaneously on that platform.
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// manipulators
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// wait up to timeout seconds for the queue to become not empty.
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// as a side effect this can do the insertion of events. if
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// timeout < 0.0 then wait indefinitely. it's possible for
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// wait() to return prematurely so always call isEmpty() to
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// see if there are any events.
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virtual void wait(double timeout) = 0;
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// reads and removes the next event on the queue. waits indefinitely
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// for an event if the queue is empty.
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virtual void pop(CEvent*) = 0;
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// push an event onto the queue
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virtual void push(const CEvent*) = 0;
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// returns true if the queue is empty and wait() would block
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virtual bool isEmpty() = 0;
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// accessors
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// get the singleton event queue
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static IEventQueue* getInstance();
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private:
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static IEventQueue* s_instance;
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};
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#endif
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