Jacek Caban : winemac: Directly use ntdll for display device mutex.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e04073188132c3508485bf8ec8441f8e48a6b568
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=e04073188132c3508485bf8ec8441f8e48a6b568

Author: Jacek Caban <jacek at codeweavers.com>
Date:   Fri May 13 22:14:54 2022 +0200

winemac: Directly use ntdll for display device mutex.

Signed-off-by: Jacek Caban <jacek at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winemac.drv/display.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/dlls/winemac.drv/display.c b/dlls/winemac.drv/display.c
index 75904bd6f5f..a5abf426cc5 100644
--- a/dlls/winemac.drv/display.c
+++ b/dlls/winemac.drv/display.c
@@ -74,17 +74,21 @@ static BOOL inited_original_display_mode;
 
 static HANDLE get_display_device_init_mutex(void)
 {
-    static const WCHAR init_mutexW[] = {'d','i','s','p','l','a','y','_','d','e','v','i','c','e','_','i','n','i','t',0};
-    HANDLE mutex = CreateMutexW(NULL, FALSE, init_mutexW);
-
-    WaitForSingleObject(mutex, INFINITE);
+    static const WCHAR init_mutexW[] = {'d','i','s','p','l','a','y','_','d','e','v','i','c','e','_','i','n','i','t'};
+    UNICODE_STRING name = { sizeof(init_mutexW), sizeof(init_mutexW), (WCHAR *)init_mutexW };
+    OBJECT_ATTRIBUTES attr;
+    HANDLE mutex = 0;
+
+    InitializeObjectAttributes(&attr, &name, OBJ_OPENIF, NULL, NULL);
+    NtCreateMutant(&mutex, MUTEX_ALL_ACCESS, &attr, FALSE);
+    if (mutex) NtWaitForSingleObject(mutex, FALSE, NULL);
     return mutex;
 }
 
 static void release_display_device_init_mutex(HANDLE mutex)
 {
-    ReleaseMutex(mutex);
-    CloseHandle(mutex);
+    NtReleaseMutant(mutex, NULL);
+    NtClose(mutex);
 }
 
 static BOOL get_display_device_reg_key(const WCHAR *device_name, WCHAR *key, unsigned len)