Zhiyi Zhang : winemac.drv: Use helpers to get and release display device init mutex.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 13e3d8f6354d23226ac5e7b1a2fb3aeb81d0b402
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=13e3d8f6354d23226ac5e7b1a2fb3aeb81d0b402

Author: Zhiyi Zhang <zzhang at codeweavers.com>
Date:   Thu Jun 11 17:22:24 2020 +0800

winemac.drv: Use helpers to get and release display device init mutex.

Signed-off-by: Zhiyi Zhang <zzhang at codeweavers.com>
Signed-off-by: Ken Thomases <ken at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/winemac.drv/display.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/dlls/winemac.drv/display.c b/dlls/winemac.drv/display.c
index 001906efdf..c024885e2d 100644
--- a/dlls/winemac.drv/display.c
+++ b/dlls/winemac.drv/display.c
@@ -136,6 +136,21 @@ static CRITICAL_SECTION modes_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 
 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);
+    return mutex;
+}
+
+static void release_display_device_init_mutex(HANDLE mutex)
+{
+    ReleaseMutex(mutex);
+    CloseHandle(mutex);
+}
+
 static BOOL get_display_device_reg_key(char *key, unsigned len)
 {
     static const char display_device_guid_prop[] = "__wine_display_device_guid";
@@ -1675,7 +1690,6 @@ static void cleanup_devices(void)
  */
 void macdrv_init_display_devices(BOOL force)
 {
-    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;
     struct macdrv_gpu *gpus = NULL;
     struct macdrv_adapter *adapters = NULL;
@@ -1691,8 +1705,7 @@ void macdrv_init_display_devices(BOOL force)
     LUID gpu_luid;
     UINT output_id = 0;
 
-    mutex = CreateMutexW(NULL, FALSE, init_mutexW);
-    WaitForSingleObject(mutex, INFINITE);
+    mutex = get_display_device_init_mutex();
 
     if (RegCreateKeyExW(HKEY_LOCAL_MACHINE, video_keyW, 0, NULL, REG_OPTION_VOLATILE, KEY_ALL_ACCESS, NULL, &video_hkey,
                         &disposition))
@@ -1760,8 +1773,7 @@ done:
     SetupDiDestroyDeviceInfoList(gpu_devinfo);
     RegCloseKey(video_hkey);
 
-    ReleaseMutex(mutex);
-    CloseHandle(mutex);
+    release_display_device_init_mutex(mutex);
 
     macdrv_free_gpus(gpus);
     macdrv_free_adapters(adapters);