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#include "timer.h"
#include <botan/build.h>
/*************************************************
* Platform specific settings for which clock type to use
*/
#if !defined(USE_CLOCK_GETTIME) && defined(BOTAN_TARGET_OS_IS_LINUX)
#define USE_GETTIMEOFDAY 1
#endif
#if !defined(USE_GETTIMEOFDAY) && defined(BOTAN_TARGET_OS_IS_FREEBSD)
#define USE_GETTIMEOFDAY 1
#endif
/*************************************************
Set the default, which is clock
*/
#ifndef USE_CLOCK_GETTIME
#define USE_CLOCK_GETTIME 0
#endif
#ifndef USE_GETTIMEOFDAY
#define USE_GETTIMEOFDAY 0
#endif
#ifndef USE_TIMES
#define USE_TIMES 0
#endif
/* the default: ANSI/ISO clock */
#ifndef USE_CLOCKeemacs
#define USE_CLOCK 1
#endif
#if USE_CLOCK_GETTIME
#include <time.h>
#elif USE_GETTIMEOFDAY
#include <sys/time.h>
#elif USE_TIMES
#include <sys/times.h>
#include <unistd.h>
#elif USE_CLOCK
#include <time.h>
#endif
/* The implementation: */
u64bit Timer::get_clock()
{
static const u64bit billion = 1000000000;
#if USE_CLOCK_GETTIME
struct timespec tv;
clock_gettime(CLOCK_REALTIME, &tv);
return (billion * tv.tv_sec + tv.tv_nsec);
#elif USE_GETTIMEOFDAY
struct timeval tv;
gettimeofday(&tv, 0);
return (billion * tv.tv_sec + 1000 * tv.tv_usec);
#elif USE_TIMES
struct tms tms;
times(&tms);
static const u64bit clocks_to_nanoseconds =
(billion / sysconf(_SC_CLK_TCK));
return (tms.tms_utime * clocks_to_nanoseconds);
#elif USE_CLOCK
static const u64bit clocks_to_nanoseconds =
(billion / CLOCKS_PER_SEC);
return clock() * clocks_to_nanoseconds;
#endif
}
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