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/*! @file superlu_timer.c
* \brief Returns the time used
*
* <pre>
* Purpose
* =======
*
* Returns the time in seconds used by the process.
*
* Note: the timer function call is machine dependent. Use conditional
* compilation to choose the appropriate function.
* </pre>
*/
#ifdef SUN
/*
* It uses the system call gethrtime(3C), which is accurate to
* nanoseconds.
*/
#include <sys/time.h>
double SuperLU_timer_() {
return ( (double)gethrtime() / 1e9 );
}
#elif _WIN32
#include <time.h>
double SuperLU_timer_()
{
clock_t t;
t=clock();
return ((double)t)/CLOCKS_PER_SEC;
}
#else
#ifndef NO_TIMER
#include <sys/types.h>
#include <sys/times.h>
#include <sys/time.h>
#include <unistd.h>
#endif
/*! \brief Timer function
*/
double SuperLU_timer_()
{
#ifdef NO_TIMER
/* no sys/times.h on WIN32 */
double tmp;
tmp = 0.0;
/* return (double)(tmp) / CLK_TCK;*/
return 0.0;
#else
struct tms use;
double tmp;
int clocks_per_sec = sysconf(_SC_CLK_TCK);
times ( &use );
tmp = use.tms_utime;
tmp += use.tms_stime;
return (double)(tmp) / clocks_per_sec;
#endif
}
#endif
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