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/*
PsychToolbox3/Source/Common/GetBusFrequencyMex/GetBusFrequencyMex.c
PLATFORMS: Matlab on OSX only
AUTHORS:
Allen Ingling awi Allen.Ingling@nyu.edu
HISTORY:
8/12/03 awi wrote it.
DESCRIPTION
GetBusFrequencyMex returns the system bus frequency. Values read and written by MachGetPriorityMex and
MachSetPriorityMex when specifying THREAD_TIME_CONSTRAINT_POLICY (realtime) paramters are in units of bus
ticks. Use the tick rate as returned by GetBusFrequencyMex to convert units into seconds.
TARGET LOCATION:
SleepSecs.mexmac resides in:
PsychToolbox/PsychObsolete/
To change the target location modify the script:
Psychtoolbox/Tools/Scripts/CopyOutMexFiles/GetBusFrequency_CopyOut.sh
*/
#include "GetBusFrequencyMex.h"
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
int mib[2], tempInt;
size_t tempIntSize;
if(nlhs > 1)
mexErrMsgTxt("GetBusFrequencyMex uses no more than one return argument.");
if(nrhs > 0)
mexErrMsgTxt("GetBusFrequencyMex uses no input arguments.");
mib[0]=CTL_HW;
mib[1]=HW_BUS_FREQ;
tempIntSize=sizeof(tempInt);
sysctl(mib, 2, &tempInt, &tempIntSize, NULL, 0);
plhs[0]=mxCreateDoubleMatrix(1, 1, mxREAL);
mxGetPr(plhs[0])[0]=(double)tempInt;
}
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