Add track_caller to Mutex and RwLock for deadlock_detection

Author: lucasmerlin

crates/epaint/src/mutex.rs

@@ -27,6 +27,7 @@ mod mutex_impl {
         }
 
         #[inline(always)]
+        #[cfg_attr(debug_assertions, track_caller)]
         pub fn lock(&self) -> MutexGuard<'_, T> {
             if cfg!(debug_assertions) {
                 self.0
@@ -157,6 +158,7 @@ mod rw_lock_impl {
 
     impl<T: ?Sized> RwLock<T> {
         #[inline(always)]
+        #[cfg_attr(debug_assertions, track_caller)]
         pub fn read(&self) -> RwLockReadGuard<'_, T> {
             let guard = if cfg!(debug_assertions) {
                 self.0
@@ -169,6 +171,7 @@ mod rw_lock_impl {
         }
 
         #[inline(always)]
+        #[cfg_attr(debug_assertions, track_caller)]
         pub fn write(&self) -> RwLockWriteGuard<'_, T> {
             let guard = if cfg!(debug_assertions) {
                 self.0