Don't call dispatch_sync(main_queue) when already main thread (resolves

pwn20wndstuff#644)
zenclwsec · Mar 2, 2019 · 0f424d1 · 0f424d1
1 parent 874aa58
commit 0f424d1
Showing 1 changed file with 9 additions and 3 deletions.
diff --git a/Undecimus/source/JailbreakViewController.h b/Undecimus/source/JailbreakViewController.h
@@ -83,9 +83,15 @@ static inline void showAlertWithCancel(NSString *title, NSString *message, Boole
 }
 
 static inline void showAlert(NSString *title, NSString *message, Boolean wait, Boolean destructive) {
-    static bool outputIsHidden;
-    dispatch_sync(dispatch_get_main_queue(), ^{
+    __block bool outputIsHidden;
+    dispatch_block_t checkOutput = ^{
         outputIsHidden = [[[JailbreakViewController sharedController] outputView] isHidden];
-    });
+    };
+
+    if ([NSThread mainThread]) {
+        checkOutput();
+    } else {
+        dispatch_sync(dispatch_get_main_queue(), checkOutput);
+    }
     showAlertWithCancel(title, message, wait, destructive, outputIsHidden?nil:@"View Log");
 }