winamp/Src/Wasabi/api/timer/timeslicer.h

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2024-09-24 12:54:57 +00:00
#ifndef __TIMESLICER_H
#define __TIMESLICER_H
// TimeSlicer allows you to create a background job to perform while not blocking
// the main GUI thread. You give it the max percentage of CPU it should use, call star()
// and it'll start calling onSlice as many times as it can without using more cpu than requested
//
// To use this class, you need to break down your job into multiple tiny chunks that
// you perform in onSlice. Typical uses include adding files to or filtering entries from
// the database, driving state machines, etc.
//
// onSlice will be called multiple times per timer.
#include "timerclient.h"
enum {
GRANULARITY_EXTRALOW = 20,
GRANULARITY_LOW = 50,
GRANULARITY_MEDIUM = 100,
GRANULARITY_HIGH = 250,
GRANULARITY_EXTRAHIGH = 1000,
};
class TimeSlicer : public TimerClientI {
public:
TimeSlicer(int percent_cpu_usage=25, int slice_duration=GRANULARITY_LOW);
virtual ~TimeSlicer();
virtual void timerclient_timerCallback(int id);
void startSlicer();
void stopSlicer();
int isSlicerStarted();
virtual void onSlicerStart();
virtual void onSlicerStop();
virtual void onBeginSliceBatch() {}
virtual void onEndSliceBatch() {}
api_dependent *timerclient_getDependencyPtr() { return timeslicer_getDependencyPtr(); }
virtual api_dependent *timeslicer_getDependencyPtr()=0;
virtual void setFirstSliceMinTime(int ms) { firstslicetime = ms; }
virtual int getSliceCount() { return slicecount; }
// override this to do your work
virtual void onSlice() { }
private:
virtual void runSlice(DWORD start, DWORD stopwhen);
float max_cpu_usage;
int duration;
int started;
int firstslicetime;
int slicecount;
};
class TimeSlicerD : public TimeSlicer, public DependentI {
public:
virtual api_dependent *timeslicer_getDependencyPtr() { return this; }
};
#endif