Convert several files to pure Objective-C

FossilOrigin-Name: eac9e3d9480c641e752bce15f24de48bbb77705cd44ef2bb9a04603ca04c67e1

src/ResolverThread.m

@@ -0,0 +1,44 @@
+#import "ResolverThread.h"
+
+#import "ResolverResult.h"
+
+extern SDL_sem *resolversem;
+extern OFMutableArray<OFString *> *resolverqueries;
+extern OFMutableArray<ResolverResult *> *resolverresults;
+
+@implementation ResolverThread
+- (id)main
+{
+	while (!_stop) {
+		SDL_SemWait(resolversem);
+
+		@synchronized(ResolverThread.class) {
+			if (resolverqueries.count == 0)
+				continue;
+
+			_query = resolverqueries.lastObject;
+			[resolverqueries removeLastObject];
+			_starttime = lastmillis;
+		}
+
+		ENetAddress address = { ENET_HOST_ANY, CUBE_SERVINFO_PORT };
+		enet_address_set_host(&address, _query.UTF8String);
+
+		@synchronized(ResolverThread.class) {
+			[resolverresults
+			    addObject:[ResolverResult resultWithQuery:_query
+			                                      address:address]];
+
+			_query = NULL;
+			_starttime = 0;
+		}
+	}
+
+	return nil;
+}
+
+- (void)stop
+{
+	_stop = true;
+}
+@end