shithub: oledsaver

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careful not to cause a fault

--- a/main.c

+++ b/main.c

@@ -8,6 +8,7 @@

 #define H 32

 #define W 126

 #define NDRAWFUNCS 7

+#define NITERFUNCS 1

 typedef int drawfunc(int x, int x);

 typedef Memimage* iterfunc(drawfunc, Memimage*);

@@ -113,10 +114,10 @@

 {

 	Memimage *img;

 	# 126 x 32 oled ⇒ 4032 pixels

-	int i;

+	int iteri, drawi;

 	h = 32;

 	w = 126;

-	ms = 100;

+	ms = 100;	// « change to ≤10 to get a kernel fault 

 	//Point topleft;

 	//double angle;

 	//angle = 0.0;

@@ -137,6 +138,10 @@

 		ob5,

 		drand,

 	};

+	

+	iterfunc *itertab[NITERFUNCS] = {

+		topdown,

+	};

 	ARGBEGIN{

 	default:

@@ -146,22 +151,20 @@

 	if (memimageinit())

 		sysfatal("memimageinit failed: %r");

-	

-	for(i = 0;; i++){

-		if(i >= NDRAWFUNCS)

-			i = 0;

-		//print("i=%d\n", i);

-

-		// clear rectangle brush position

-

-		// clear the screen

+	// FOR EVER

+	for(;;){

+		iteri = ntruerand(NITERFUNCS);

+		drawi = ntruerand(NDRAWFUNCS);

+		// blank the screen

 		img = allocmemimage(Rect(0, 0, w, h), GREY1);

 		if (!img)

 			sysfatal("cannot allocate memimage: %r");

+

+		// white on black; bg is black

 		memfillcolor(img, DBlack);

 		/* call the independent drawing routine of choice */

-		topdown(drawtab[i], img);

+		itertab[iteri](drawtab[drawi], img);

 		//angle = truerand();