ref: cb49854d10054ecbc24f169015647eda7a997d1a
dir: /src/i_timer.c/
// // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2005-2014 Simon Howard // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License // as published by the Free Software Foundation; either version 2 // of the License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // DESCRIPTION: // Timer functions. // #include "SDL.h" #include "i_timer.h" #include "doomtype.h" // // I_GetTime // returns time in 1/35th second tics // static Uint32 basetime = 0; int I_GetTime (void) { Uint32 ticks; ticks = SDL_GetTicks(); if (basetime == 0) basetime = ticks; ticks -= basetime; return (ticks * TICRATE) / 1000; } // // Same as I_GetTime, but returns time in milliseconds // int I_GetTimeMS(void) { Uint32 ticks; ticks = SDL_GetTicks(); if (basetime == 0) basetime = ticks; return ticks - basetime; } // Sleep for a specified number of ms void I_Sleep(int ms) { SDL_Delay(ms); } void I_WaitVBL(int count) { I_Sleep((count * 1000) / 70); } void I_InitTimer(void) { // initialize timer #if SDL_VERSION_ATLEAST(2, 0, 5) SDL_SetHint(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING, "1"); #endif SDL_Init(SDL_INIT_TIMER); }