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Andy ROSS:

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add systime() function for benchmarking purposes. It returns UNIX epoch
time in seconds.
This commit is contained in:
mfranz 2007-05-14 16:24:41 +00:00
parent 30295a7d37
commit 8eeafbac8e
1 changed files with 23 additions and 0 deletions
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23
src/Scripting/NasalSys.cxx
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@ -3,6 +3,10 @@
# include "config.h"
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h> // gettimeofday
#endif
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
@ -344,6 +348,24 @@ static naRef f_directory(naContext c, naRef me, int argc, naRef* args)
return result;
}
// Return UNIX epoch time in seconds.
static naRef f_systime(naContext c, naRef me, int argc, naRef* args)
{
#ifdef WIN32
FILETIME ft;
GetSystemTimeAsFileTime(&ft);
double t = (4294967296.0 * ft.dwHighDateTime + ft.dwLowDateTime);
// Converts from 100ns units in 1601 epoch to unix epoch in sec
return naNum((t * 1e-7) - 11644473600.0);
#else
time_t t;
struct timeval td;
do { t = time(0); gettimeofday(&td, 0); } while(t != time(0));
return naNum(t + 1e-6 * td.tv_usec);
#endif
}
// Table of extension functions. Terminate with zeros.
static struct { char* name; naCFunction func; } funcs[] = {
{ "getprop", f_getprop },
@ -358,6 +380,7 @@ static struct { char* name; naCFunction func; } funcs[] = {
{ "rand", f_rand },
{ "srand", f_srand },
{ "directory", f_directory },
{ "systime", f_systime },
{ 0, 0 }
};