fix(single-instance): Fix compile errors after windows-sys 0.59 update, fixes #1730

Author: FabianLars

plugins/single-instance/src/platform_impl/windows.rs

@@ -49,7 +49,7 @@ pub fn init<R: Runtime>(f: Box<SingleInstanceCallback<R>>) -> TauriPlugin<R> {
                 unsafe {
                     let hwnd = FindWindowW(class_name.as_ptr(), window_name.as_ptr());
 
-                    if hwnd != 0 {
+                    if !hwnd.is_null() {
                         let data = format!(
                             "{}|{}\0",
                             std::env::current_dir()
@@ -69,7 +69,7 @@ pub fn init<R: Runtime>(f: Box<SingleInstanceCallback<R>>) -> TauriPlugin<R> {
                     }
                 }
             } else {
-                app.manage(MutexHandle(hmutex));
+                app.manage(MutexHandle(hmutex as _));
 
                 let hwnd = create_event_target_window::<R>(&class_name, &window_name);
                 unsafe {
@@ -80,7 +80,7 @@ pub fn init<R: Runtime>(f: Box<SingleInstanceCallback<R>>) -> TauriPlugin<R> {
                     )
                 };
 
-                app.manage(TargetWindowHandle(hwnd));
+                app.manage(TargetWindowHandle(hwnd as _));
             }
 
             Ok(())
@@ -96,12 +96,12 @@ pub fn init<R: Runtime>(f: Box<SingleInstanceCallback<R>>) -> TauriPlugin<R> {
 pub fn destroy<R: Runtime, M: Manager<R>>(manager: &M) {
     if let Some(hmutex) = manager.try_state::<MutexHandle>() {
         unsafe {
-            ReleaseMutex(hmutex.0);
-            CloseHandle(hmutex.0);
+            ReleaseMutex(hmutex.0 as _);
+            CloseHandle(hmutex.0 as _);
         }
     }
     if let Some(hwnd) = manager.try_state::<TargetWindowHandle>() {
-        unsafe { DestroyWindow(hwnd.0) };
+        unsafe { DestroyWindow(hwnd.0 as _) };
     }
 }
 
@@ -145,12 +145,12 @@ fn create_event_target_window<R: Runtime>(class_name: &[u16], window_name: &[u16
             cbClsExtra: 0,
             cbWndExtra: 0,
             hInstance: GetModuleHandleW(std::ptr::null()),
-            hIcon: 0,
-            hCursor: 0,
-            hbrBackground: 0,
+            hIcon: std::ptr::null_mut(),
+            hCursor: std::ptr::null_mut(),
+            hbrBackground: std::ptr::null_mut(),
             lpszMenuName: std::ptr::null(),
             lpszClassName: class_name.as_ptr(),
-            hIconSm: 0,
+            hIconSm: std::ptr::null_mut(),
         };
 
         RegisterClassExW(&class);
@@ -174,8 +174,8 @@ fn create_event_target_window<R: Runtime>(class_name: &[u16], window_name: &[u16
             0,
             0,
             0,
-            0,
-            0,
+            std::ptr::null_mut(),
+            std::ptr::null_mut(),
             GetModuleHandleW(std::ptr::null()),
             std::ptr::null(),
         );