move GFX2_GetTicks() to osdep.c

src/osdep.c

@@ -0,0 +1,50 @@
+/* vim:expandtab:ts=2 sw=2:
+*/
+/*  Grafx2 - The Ultimate 256-color bitmap paint program
+
+    Copyright 2020 Thomas Bernard
+    Copyright 2011 Pawel Góralski
+    Copyright 2008 Yves Rizoud
+    Copyright 2008 Franck Charlet
+    Copyright 2007 Adrien Destugues
+    Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
+
+    Grafx2 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; version 2
+    of the License.
+
+    Grafx2 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.
+
+    You should have received a copy of the GNU General Public License
+    along with Grafx2; if not, see <http://www.gnu.org/licenses/>
+*/
+#if defined(USE_SDL) || defined(USE_SDL2)
+#include <SDL.h>
+#else
+#if defined(WIN32)
+#include <windows.h>
+#else
+#include <sys/time.h>
+#endif
+#endif
+
+#include "struct.h"
+
+dword GFX2_GetTicks(void)
+{
+#if defined(USE_SDL) || defined(USE_SDL2)
+  return SDL_GetTicks();
+#elif defined(WIN32)
+  return GetTickCount();
+#else
+  struct timeval tv;
+  if (gettimeofday(&tv, NULL) < 0)
+    return 0;
+  return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+#endif
+}
+