devdraw: more fixes (thanks David Jeannot)

man/man1/snarfer.1

@@ -33,7 +33,7 @@ See
 .IR getsnarf (3)
 for more details.
 .SH SOURCE
-.B \*9/src/cmd/snarfer.c
+.B \*9/src/cmd/snarfer
 .SH SEE ALSO
 Unix's \fIxclipboard\fR(1),
 .IR getsnarf (3)

src/cmd/devdraw/cocoa-srv.c

@@ -78,8 +78,6 @@ servep9p(void)
 
 	fmtinstall('W', drawfcallfmt);
 	
-//	notify(bell);
-
 	mbuf = nil;
 	nmbuf = 0;
 	while((n = read(3, buf, 4)) == 4){

src/cmd/devdraw/cocoa-thread.c

@@ -2,6 +2,8 @@
 #include <libc.h>
 #include "cocoa-thread.h"
 
+#ifndef TRY_LIBTHREAD
+
 static pthread_mutex_t initlock = PTHREAD_MUTEX_INITIALIZER;
 
 void
@@ -23,3 +25,4 @@ qunlock(QLock *q)
 {
 	pthread_mutex_unlock(&q->m);
 }
+#endif

src/cmd/devdraw/cocoa-thread.h

@@ -1,14 +1,33 @@
-#define QLock DQLock
-#define qlock dqlock
-#define qunlock dqunlock
+/*
+ * I am too ignorant to know if Cocoa and Libthread
+ * can coexist: if I try to include thread.h, now
+ * that Devdraw uses Cocoa's threads (and timers), it
+ * crashes immediately; when Devdraw was using
+ * proccreate(), it could run a little while before to
+ * crash; the origin of those crashes is hard to
+ * ascertain, because other programs using Libthread
+ * (such as 9term, Acme, Plumber, and Sam) currently
+ * don't run when compiled with Xcode 4.1.
+ */
+//#define TRY_LIBTHREAD
 
-typedef struct QLock QLock;
+#ifdef TRY_LIBTHREAD
+	#include <thread.h>
+#else
+	#define QLock DQLock
+	#define qlock dqlock
+	#define qunlock dqunlock
+	#define threadexitsall exits
+	#define threadmain main
 
-struct QLock
-{
-	pthread_mutex_t m;
-	int init;
-};
+	typedef struct QLock QLock;
 
-void	qlock(QLock*);
-void	qunlock(QLock*);
+	struct QLock
+	{
+		int init;
+		pthread_mutex_t m;
+	};
+
+	void	qlock(QLock*);
+	void	qunlock(QLock*);
+#endif