devdraw: can use libthread directly now on macOS

src/cmd/devdraw/cocoa-screen.m

@@ -12,7 +12,7 @@
 
 #include <u.h>
 #include <libc.h>
-#include  "cocoa-thread.h"
+#include <thread.h>
 #include <draw.h>
 #include <memdraw.h>
 #include <keyboard.h>
@@ -41,8 +41,8 @@ usage(void)
 	threadexitsall("usage");
 }
 
+
 @interface AppDelegate : NSObject<NSApplicationDelegate,NSWindowDelegate>
-+ (void)callservep9p:(id)arg;
 + (void)makewin:(NSValue *)v;
 + (void)callkicklabel:(NSString *)v;
 + (void)callsetNeedsDisplayInRect:(NSValue *)v;
@@ -108,14 +108,18 @@ threadmain(int argc, char **argv)
 	}
 }
 
-@implementation AppDelegate
 
-+ (void)callservep9p:(id)arg
+void
+callservep9p(void *v)
 {
+	USED(v);
+
 	servep9p();
-	[NSApp terminate:self];
+	[NSApp terminate:myApp];
 }
 
+@implementation AppDelegate
+
 + (void)makewin:(NSValue *)v
 {
 	NSRect r, sr;
@@ -331,9 +335,7 @@ struct Cursors {
 	[NSApp setApplicationIconImage:i];
 	[[NSApp dockTile] display];
 
-	[NSThread
-		detachNewThreadSelector:@selector(callservep9p:)
-		toTarget:[self class] withObject:nil];
+	proccreate(callservep9p, nil, 0);
 }
 
 - (NSApplicationPresentationOptions)window:(id)arg
@@ -671,6 +673,7 @@ struct Cursors {
 	if(actualRange)
 		*actualRange = sr;
 	LOG(@"use range: %ld, %ld", sr.location, sr.length);
+	s = nil;
 	if(sr.length)
 		s = [[NSAttributedString alloc]
 			initWithString:[_tmpText substringWithRange:sr]];

src/cmd/devdraw/cocoa-srv.c

@@ -4,7 +4,7 @@
 
 #include <u.h>
 #include <libc.h>
-#include "cocoa-thread.h"
+#include <thread.h>
 #include <draw.h>
 #include <memdraw.h>
 #include <keyboard.h>

src/cmd/devdraw/cocoa-thread.c

@@ -1,35 +0,0 @@
-#include <u.h>
-#include <libc.h>
-#include "cocoa-thread.h"
-
-#ifndef TRY_LIBTHREAD
-
-static pthread_mutex_t initlock = PTHREAD_MUTEX_INITIALIZER;
-
-void
-qlock(QLock *q)
-{
-	if(q->init == 0){
-		pthread_mutex_lock(&initlock);
-		if(q->init == 0){
-			pthread_mutex_init(&q->m, nil);
-			q->init = 1;
-		}
-		pthread_mutex_unlock(&initlock);
-	}
-	pthread_mutex_lock(&q->m);
-}
-
-void
-qunlock(QLock *q)
-{
-	pthread_mutex_unlock(&q->m);
-}
-
-int
-threadid(void)
-{
-	return pthread_mach_thread_np(pthread_self());
-}
-
-#endif

src/cmd/devdraw/cocoa-thread.h

@@ -1,34 +0,0 @@
-/*
- * 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
-
-#ifdef TRY_LIBTHREAD
-	#include <thread.h>
-#else
-	#define QLock DQLock
-	#define qlock dqlock
-	#define qunlock dqunlock
-	#define threadexitsall exits
-	#define threadmain main
-
-	typedef struct QLock QLock;
-
-	struct QLock
-	{
-		int init;
-		pthread_mutex_t m;
-	};
-
-	void	qlock(QLock*);
-	void	qunlock(QLock*);
-	int threadid(void);
-#endif

src/cmd/devdraw/mkwsysrules.sh

@@ -53,7 +53,7 @@ if [ $WSYSTYPE = x11 ]; then
 	echo 'WSYSOFILES=$WSYSOFILES '$XO
 elif [ $WSYSTYPE = osx-cocoa ]; then
 	echo 'OBJCFLAGS=$OBJCFLAGS -fobjc-arc'
-	echo 'WSYSOFILES=$WSYSOFILES osx-draw.o cocoa-screen.o cocoa-srv.o cocoa-thread.o'
+	echo 'WSYSOFILES=$WSYSOFILES osx-draw.o cocoa-screen.o cocoa-srv.o'
 	echo 'MACARGV=macargv.o'
 elif [ $WSYSTYPE = nowsys ]; then
 	echo 'WSYSOFILES=nowsys.o'