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//-----------------------------------------------------------------------------
/** @file libboardgame_base/CpuTime.cpp
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#include "CpuTime.h"
#ifdef _WIN32
#include <windows.h>
#endif
#if __has_include(<unistd.h>)
#include <unistd.h>
#endif
#if __has_include(<sys/times.h>)
#include <sys/times.h>
#endif
namespace libboardgame_base {
//-----------------------------------------------------------------------------
double cpu_time()
{
#ifdef _WIN32
FILETIME create;
FILETIME exit;
FILETIME sys;
FILETIME user;
if (! GetProcessTimes(GetCurrentProcess(), &create, &exit, &sys, &user))
return -1;
ULARGE_INTEGER sys_int;
sys_int.LowPart = sys.dwLowDateTime;
sys_int.HighPart = sys.dwHighDateTime;
ULARGE_INTEGER user_int;
user_int.LowPart = user.dwLowDateTime;
user_int.HighPart = user.dwHighDateTime;
return (sys_int.QuadPart + user_int.QuadPart) * 1e-7;
#elif __has_include(<unistd.h>) && __has_include(<sys/times.h>)
static auto ticks_per_second = double(sysconf(_SC_CLK_TCK));
struct tms buf;
if (times(&buf) == clock_t(-1))
return -1;
clock_t clock_ticks =
buf.tms_utime + buf.tms_stime + buf.tms_cutime + buf.tms_cstime;
return double(clock_ticks) / ticks_per_second;
#else
return -1;
#endif
}
//-----------------------------------------------------------------------------
} // namespace libboardgame_base
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