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#include <lua.h>
#include <lauxlib.h>
#ifdef _WIN32
#define WINDOWS_LEAN_AND_MEAN
#include <windows.h>
#include <stdint.h>
static int l_clock(lua_State *L) {
static const uint64_t EPOCH = 116444736000000000ULL;
SYSTEMTIME systemtime;
FILETIME filetime;
uint64_t time;
GetSystemTime(&systemtime);
GetSystemTimeAsFileTime(&filetime);
time = (((uint64_t)filetime.dwHighDateTime) << 32) + ((uint64_t)filetime.dwLowDateTime);
double precise_time = (time - EPOCH) / 10000000.0;
lua_pushnumber(L, precise_time);
return 1;
}
static int l_usleep(lua_State *L) {
int time = 1;
if (lua_isnumber(L, 1)) time = lua_tonumber(L, 1);
Sleep(time / 1000);
return 1;
}
#else
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
static int l_clock(lua_State *L) {
struct timeval tv;
struct timezone tz;
struct tm *tm;
gettimeofday(&tv, &tz);
tm=localtime(&tv.tv_sec);
double precise_time = tv.tv_sec + tv.tv_usec / 1e6;
lua_pushnumber(L,precise_time);
return 1;
}
static int l_usleep(lua_State *L) {
int time = 1;
if (lua_isnumber(L, 1)) time = lua_tonumber(L, 1);
usleep(time);
return 1;
}
#endif
static const struct luaL_Reg routines [] = {
{"clock", l_clock},
{"usleep", l_usleep},
{NULL, NULL}
};
#if defined(_WIN32)
#define SYS_DLLEXPORT __declspec(dllexport) __cdecl
#else
#define SYS_DLLEXPORT
#endif
int SYS_DLLEXPORT luaopen_libsys(lua_State *L)
{
lua_newtable(L);
#if LUA_VERSION_NUM == 501
luaL_register(L, NULL, routines);
#else
luaL_setfuncs(L, routines, 0);
#endif
return 1;
}
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