#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 }