64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
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#ifndef __TIMESLICER_H
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#define __TIMESLICER_H
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// TimeSlicer allows you to create a background job to perform while not blocking
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// the main GUI thread. You give it the max percentage of CPU it should use, call star()
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// and it'll start calling onSlice as many times as it can without using more cpu than requested
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//
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// To use this class, you need to break down your job into multiple tiny chunks that
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// you perform in onSlice. Typical uses include adding files to or filtering entries from
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// the database, driving state machines, etc.
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//
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// onSlice will be called multiple times per timer.
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#include "timerclient.h"
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enum {
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GRANULARITY_EXTRALOW = 20,
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GRANULARITY_LOW = 50,
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GRANULARITY_MEDIUM = 100,
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GRANULARITY_HIGH = 250,
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GRANULARITY_EXTRAHIGH = 1000,
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};
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class TimeSlicer : public TimerClientI {
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public:
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TimeSlicer(int percent_cpu_usage=25, int slice_duration=GRANULARITY_LOW);
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virtual ~TimeSlicer();
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virtual void timerclient_timerCallback(int id);
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void startSlicer();
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void stopSlicer();
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int isSlicerStarted();
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virtual void onSlicerStart();
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virtual void onSlicerStop();
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virtual void onBeginSliceBatch() {}
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virtual void onEndSliceBatch() {}
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api_dependent *timerclient_getDependencyPtr() { return timeslicer_getDependencyPtr(); }
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virtual api_dependent *timeslicer_getDependencyPtr()=0;
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virtual void setFirstSliceMinTime(int ms) { firstslicetime = ms; }
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virtual int getSliceCount() { return slicecount; }
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// override this to do your work
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virtual void onSlice() { }
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private:
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virtual void runSlice(DWORD start, DWORD stopwhen);
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float max_cpu_usage;
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int duration;
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int started;
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int firstslicetime;
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int slicecount;
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};
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class TimeSlicerD : public TimeSlicer, public DependentI {
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public:
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virtual api_dependent *timeslicer_getDependencyPtr() { return this; }
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};
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#endif
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