Port Sys_Milliseconds() to SDL

Sync with SDL and use unsigned int as return type.
Code outside of sys/ still uses signed ints to store the result.

neo/sys/linux/input.cpp

@@ -47,7 +47,7 @@ static int mwx, mwy;
 static int mx = 0, my = 0;
 
 // time mouse was last reset, we ignore the first 50ms of the mouse to allow settling of events
-static int mouse_reset_time = 0;
+static unsigned int mouse_reset_time = 0;
 #define MOUSE_RESET_DELAY 50
 
 // backup original values for pointer grab/ungrab

neo/sys/posix/posix_main.cpp

@@ -151,37 +151,6 @@ void Sys_Quit(void) {
 	Posix_Exit( EXIT_SUCCESS );
 }
 
-/*
-================
-Sys_Milliseconds
-================
-*/
-/* base time in seconds, that's our origin
-   timeval:tv_sec is an int:
-   assuming this wraps every 0x7fffffff - ~68 years since the Epoch (1970) - we're safe till 2038
-   using unsigned long data type to work right with Sys_XTimeToSysTime */
-unsigned long sys_timeBase = 0;
-/* current time in ms, using sys_timeBase as origin
-   NOTE: sys_timeBase*1000 + curtime -> ms since the Epoch
-	 0x7fffffff ms - ~24 days
-		 or is it 48 days? the specs say int, but maybe it's casted from unsigned int?
-*/
-int Sys_Milliseconds( void ) {
-	int curtime;
-	struct timeval tp;
-
-	gettimeofday(&tp, NULL);
-
-	if (!sys_timeBase) {
-		sys_timeBase = tp.tv_sec;
-		return tp.tv_usec / 1000;
-	}
-
-	curtime = (tp.tv_sec - sys_timeBase) * 1000 + tp.tv_usec / 1000;
-
-	return curtime;
-}
-
 /*
 ================
 Sys_Mkdir
@@ -525,8 +494,6 @@ Posix_EarlyInit
 void Posix_EarlyInit( void ) {
 	exit_spawn[0] = '\0';
 	Posix_InitSigs();
-	// set the base time
-	Sys_Milliseconds();
 }
 
 /*

neo/sys/stub/sys_stub.cpp

@@ -39,9 +39,9 @@ If you have questions concerning this license or the applicable additional terms
 
 #define	MAX_OSPATH			256
 
-static	int		frameNum;
+static	unsigned int		frameNum;
 
-int Sys_Milliseconds( void ) {
+unsigned int Sys_Milliseconds( void ) {
 	return frameNum * 16;
 }
 

neo/sys/sys_public.h

@@ -149,7 +149,7 @@ void			Sys_Sleep( int msec );
 
 // Sys_Milliseconds should only be used for profiling purposes,
 // any game related timing information should come from event timestamps
-int				Sys_Milliseconds( void );
+unsigned int	Sys_Milliseconds( void );
 
 // for accurate performance testing
 double			Sys_GetClockTicks( void );

neo/sys/threads.cpp

@@ -28,6 +28,7 @@ If you have questions concerning this license or the applicable additional terms
 
 #include <SDL_mutex.h>
 #include <SDL_thread.h>
+#include <SDL_timer.h>
 
 #include "sys/platform.h"
 #include "framework/Common.h"
@@ -51,6 +52,15 @@ void Sys_Sleep(int msec) {
 	SDL_Delay(msec);
 }
 
+/*
+================
+Sys_Milliseconds
+================
+*/
+unsigned int Sys_Milliseconds() {
+	return SDL_GetTicks();
+}
+
 /*
 ==================
 Sys_InitThreads

neo/sys/win32/win_main.cpp

@@ -1037,9 +1037,6 @@ int main(int argc, char *argv[]) {
 	// no abort/retry/fail errors
 	SetErrorMode( SEM_FAILCRITICALERRORS );
 
-	// get the initial time base
-	Sys_Milliseconds();
-
 #ifdef DEBUG
 	// disable the painfully slow MS heap check every 1024 allocs
 	_CrtSetDbgFlag( 0 );

neo/sys/win32/win_net.cpp

@@ -841,7 +841,7 @@ typedef struct udpMsg_s {
 	byte				data[MAX_UDP_MSG_SIZE];
 	netadr_t			address;
 	int					size;
-	int					time;
+	unsigned int		time;
 	struct udpMsg_s *	next;
 } udpMsg_t;
 

neo/sys/win32/win_shared.cpp

@@ -47,25 +47,6 @@ If you have questions concerning this license or the applicable additional terms
 #pragma comment (lib, "wbemuuid.lib")
 #endif
 
-/*
-================
-Sys_Milliseconds
-================
-*/
-int Sys_Milliseconds( void ) {
-	int sys_curtime;
-	static int sys_timeBase;
-	static bool	initialized = false;
-
-	if ( !initialized ) {
-		sys_timeBase = timeGetTime();
-		initialized = true;
-	}
-	sys_curtime = timeGetTime() - sys_timeBase;
-
-	return sys_curtime;
-}
-
 /*
 ================
 Sys_GetSystemRam