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64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
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#ifndef PA_CPULOAD_H
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#define PA_CPULOAD_H
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/*
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* $Id$
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* Portable Audio I/O Library CPU Load measurement functions
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* Portable CPU load measurement facility.
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*
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* Based on the Open Source API proposed by Ross Bencina
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* Copyright (c) 2002 Ross Bencina
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/** @file
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@brief Functions to assist in measuring the CPU utilization of a callback
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stream. Used to implement the Pa_GetStreamCpuLoad() function.
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*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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typedef struct {
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double samplingPeriod;
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double measurementStartTime;
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double averageLoad;
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} PaUtilCpuLoadMeasurer; /**< @todo need better name than measurer */
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void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate );
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void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer );
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void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed );
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void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer );
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double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer );
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* PA_CPULOAD_H */
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