winemac: Use pthread_once for wine_vk_init.

dlls/winemac.drv/vulkan.c

@@ -101,12 +101,12 @@ static inline struct wine_vk_surface *surface_from_handle(VkSurfaceKHR handle)
 
 static void *vulkan_handle;
 
-static BOOL WINAPI wine_vk_init(INIT_ONCE *once, void *param, void **context)
+static void wine_vk_init(void)
 {
     if (!(vulkan_handle = dlopen(SONAME_LIBMOLTENVK, RTLD_NOW)))
     {
         ERR("Failed to load %s\n", SONAME_LIBMOLTENVK);
-        return TRUE;
+        return;
     }
 
 #define LOAD_FUNCPTR(f) if ((p##f = dlsym(vulkan_handle, #f)) == NULL) goto fail;
@@ -130,12 +130,11 @@ static BOOL WINAPI wine_vk_init(INIT_ONCE *once, void *param, void **context)
     LOAD_FUNCPTR(vkQueuePresentKHR)
 #undef LOAD_FUNCPTR
 
-    return TRUE;
+    return;
 
 fail:
     dlclose(vulkan_handle);
     vulkan_handle = NULL;
-    return TRUE;
 }
 
 /* Helper function for converting between win32 and MoltenVK compatible VkInstanceCreateInfo.
@@ -625,7 +624,7 @@ static void *macdrv_get_vk_instance_proc_addr(VkInstance instance, const char *n
 
 static const struct vulkan_funcs *get_vulkan_driver(UINT version)
 {
-    static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
+    static pthread_once_t init_once = PTHREAD_ONCE_INIT;
 
     if (version != WINE_VULKAN_DRIVER_VERSION)
     {
@@ -633,7 +632,7 @@ static const struct vulkan_funcs *get_vulkan_driver(UINT version)
         return NULL;
     }
 
-    InitOnceExecuteOnce(&init_once, wine_vk_init, NULL, NULL);
+    pthread_once(&init_once, wine_vk_init);
     if (vulkan_handle)
         return &vulkan_funcs;