Mercurial > sdl-ios-xcode
diff src/timer/mint/SDL_vbltimer.S @ 2116:b42abf0a50bc
Avoid switch to supervisor mode in SDL_GetTicks, by updating system counter from vbl interrupt
| author | Patrice Mandin <patmandin@gmail.com> |
|---|---|
| date | Sat, 09 Jun 2007 19:58:41 +0000 |
| parents | eb5e61b72da3 |
| children | 99210400e8b9 |
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--- a/src/timer/mint/SDL_vbltimer.S Fri Jun 08 21:44:55 2007 +0000 +++ b/src/timer/mint/SDL_vbltimer.S Sat Jun 09 19:58:41 2007 +0000 @@ -27,6 +27,7 @@ */ #define _vbl_queue 0x456 +#define _hz_200 0x4ba .text @@ -42,6 +43,7 @@ lea _my_vbl,a0 clrw vbl_mutex + movel _hz_200.w, _SDL_Atari_hz200 /* Stop interrupts */ @@ -108,6 +110,9 @@ /*--- Our vbl ---*/ _my_vbl: + /* Update _hz_200 */ + movel _hz_200.w, _SDL_Atari_hz200 + /* Verify if this is not already running */ tstw vbl_mutex @@ -147,6 +152,8 @@ .data .even + .comm _SDL_Atari_hz200,4*1 + .even .comm vbl_mutex,2*1 .even .comm my_vector,4*1