* Provide a LaunchLooper that receives launch messages and executes the launch

functions provided with the given arguments.
* Make use of that looper to replace spawning a thread for each launch task.

On the one side this reduces the amount of used threads (and should fix #698)
and on the other side it makes the order in which refs are sent a bit more
predictable.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35351 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/tracker/FSUtils.cpp

@@ -3022,12 +3022,20 @@ TrackerOpenWith(const BMessage *refs)
 	return B_OK;
 }
 
+
 static void
 AsynchLaunchBinder(void (*func)(const entry_ref *, const BMessage *, bool on),
-	const entry_ref *entry, const BMessage *message, bool on)
+	const entry_ref *appRef, const BMessage *refs, bool openWithOK)
 {
-	Thread::Launch(NewFunctionObject(func, entry, message, on),
+	BMessage *task = new BMessage;
-		B_NORMAL_PRIORITY, "LaunchTask");
+	task->AddPointer("function", (void *)func);
+	task->AddMessage("refs", refs);
+	task->AddBool("openWithOK", openWithOK);
+	if (appRef != NULL)
+		task->AddRef("appRef", appRef);
+
+	extern BLooper *gLaunchLooper;
+	gLaunchLooper->PostMessage(task);
 }
 
 static bool

src/kits/tracker/Tracker.cpp

@@ -107,6 +107,40 @@ namespace BPrivate {
 
 NodePreloader *gPreloader = NULL;
 
+class LaunchLooper : public BLooper {
+public:
+	LaunchLooper()
+		:
+		BLooper("launch looper")
+	{
+	}
+
+	virtual void
+	MessageReceived(BMessage *message)
+	{
+		void (*function)(const entry_ref *, const BMessage *, bool);
+		BMessage refs;
+		bool openWithOK;
+		entry_ref appRef;
+
+		if (message->FindPointer("function", (void **)&function) != B_OK
+			|| message->FindMessage("refs", &refs) != B_OK
+			|| message->FindBool("openWithOK", &openWithOK) != B_OK) {
+			printf("incomplete launch message\n");
+			return;
+		}
+
+		if (message->FindRef("appRef", &appRef) == B_OK)
+			function(&appRef, &refs, openWithOK);
+		else
+			function(NULL, &refs, openWithOK);
+	}
+};
+
+BLooper *gLaunchLooper = NULL;
+
+// #pragma mark -
+
 void
 InitIconPreloader()
 {
@@ -204,11 +238,16 @@ TTracker::TTracker()
 
 	//This is how often it should update the free space bar on the volume icons
 	SetPulseRate(1000000);
+
+	gLaunchLooper = new LaunchLooper();
+	gLaunchLooper->Run();
 }
 
 
 TTracker::~TTracker()
 {
+	gLaunchLooper->Lock();
+	gLaunchLooper->Quit();
 }