shithub: pplay

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avoid races between sample drawing and edits, fix lmb click behavior

--- a/draw.c

+++ b/draw.c

@@ -5,6 +5,8 @@

 #include "dat.h"

 #include "fns.h"

+QLock synclock;

+

 enum{

 	Cbg,

 	Csamp,

@@ -84,13 +86,18 @@

 		m = viewe - views;

 		x = 0;

 		while(m > 0){

-			if(nbrecvul(drawc) == 1)

+			qlock(&synclock);

+			if(nbrecvul(drawc) == 1){

+				qunlock(&synclock);

 				goto again;

+			}

 			n = m < T ? m : T;

 			if((p = getbuf(d, n, sbuf, &n)) == nil){

+				qunlock(&synclock);

 				fprint(2, "getbuf: %r\n");

 				goto end;

 			}

+				qunlock(&synclock);

 			d.pos += n;

 			e = p + n;

 			lmin = lmax = 0;

@@ -254,14 +261,11 @@

 }

 void

-setcur(usize off, int jumponly)

+setcur(usize off)

 {

 	if(off < dot.from.pos || off > dot.to.pos - Outsz)

 		return;

-	if(jumponly)

-		jump(off);

-	else

-		setpos(off);

+	jump(off);

 	update();

 }

@@ -268,13 +272,13 @@

 void

 setjump(usize off)

 {

-	setcur(off, 1);

+	setcur(off);

 }

 void

 setofs(usize ofs)

 {

-	setcur(views + ofs * T, 0);

+	setcur(views + ofs * T);

 }

 static void

--- a/pplay.c

+++ b/pplay.c

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

 #include "dat.h"

 #include "fns.h"

+extern QLock synclock;

+

 int stereo, zoom = 1;

 int debug;

@@ -151,6 +153,7 @@

 			default:

 				if((p = prompt(r)) == nil || strlen(p) == 0)

 					break;

+				qlock(&synclock);

 				switch(cmd(p)){

 				case -1: fprint(2, "cmd \"%s\" failed: %r\n", p); break;

 				case 0: update(); break;

@@ -157,6 +160,7 @@

 				case 1: redraw(0); break;

 				case 2: redraw(1); break;

 				}

+				qunlock(&synclock);

 			}

 		}

 	}