util-src/time.c

   1 #ifndef _POSIX_C_SOURCE
   2 #define _POSIX_C_SOURCE 200809L
   3 #endif
   4
   5 #include <time.h>
   6 #include <lua.h>
   7
   8 lua_Number tv2number(struct timespec *tv) {
   9         return tv->tv_sec + tv->tv_nsec * 1e-9;
  10 }
  11
  12 int lc_time_realtime(lua_State *L) {
  13         struct timespec t;
  14         clock_gettime(CLOCK_REALTIME, &t);
  15         lua_pushnumber(L, tv2number(&t));
  16         return 1;
  17 }
  18
  19 int lc_time_monotonic(lua_State *L) {
  20         struct timespec t;
  21         clock_gettime(CLOCK_MONOTONIC, &t);
  22         lua_pushnumber(L, tv2number(&t));
  23         return 1;
  24 }
  25
  26 int luaopen_util_time(lua_State *L) {
  27         lua_createtable(L, 0, 2);
  28         {
  29                 lua_pushcfunction(L, lc_time_realtime);
  30                 lua_setfield(L, -2, "now");
  31                 lua_pushcfunction(L, lc_time_monotonic);
  32                 lua_setfield(L, -2, "monotonic");
  33         }
  34         return 1;
  35 }