pa_cpuload.h

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00001 #ifndef PA_CPULOAD_H
00002 #define PA_CPULOAD_H
00003 /*
00004  * $Id: pa_cpuload.h 1097 2006-08-26 08:27:53Z rossb $
00005  * Portable Audio I/O Library CPU Load measurement functions
00006  * Portable CPU load measurement facility.
00007  *
00008  * Based on the Open Source API proposed by Ross Bencina
00009  * Copyright (c) 2002 Ross Bencina
00010  *
00011  * Permission is hereby granted, free of charge, to any person obtaining
00012  * a copy of this software and associated documentation files
00013  * (the "Software"), to deal in the Software without restriction,
00014  * including without limitation the rights to use, copy, modify, merge,
00015  * publish, distribute, sublicense, and/or sell copies of the Software,
00016  * and to permit persons to whom the Software is furnished to do so,
00017  * subject to the following conditions:
00018  *
00019  * The above copyright notice and this permission notice shall be
00020  * included in all copies or substantial portions of the Software.
00021  *
00022  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00023  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00024  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00025  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
00026  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
00027  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00028  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00029  */
00030 
00031 /*
00032  * The text above constitutes the entire PortAudio license; however, 
00033  * the PortAudio community also makes the following non-binding requests:
00034  *
00035  * Any person wishing to distribute modifications to the Software is
00036  * requested to send the modifications to the original developer so that
00037  * they can be incorporated into the canonical version. It is also 
00038  * requested that these non-binding requests be included along with the 
00039  * license above.
00040  */
00041 
00050 #ifdef __cplusplus
00051 extern "C"
00052 {
00053 #endif /* __cplusplus */
00054 
00055 
00056 typedef struct {
00057     double samplingPeriod;
00058     double measurementStartTime;
00059     double averageLoad;
00060 } PaUtilCpuLoadMeasurer; 
00062 void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate );
00063 void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer );
00064 void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed );
00065 void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer );
00066 double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer );
00067 
00068 
00069 #ifdef __cplusplus
00070 }
00071 #endif /* __cplusplus */     
00072 #endif /* PA_CPULOAD_H */

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