ntdll: Implement NtQueryMutant().

dlls/ntdll/unix/esync.c

@@ -560,6 +560,26 @@ NTSTATUS esync_release_mutex( HANDLE *handle, LONG *prev )
     return STATUS_SUCCESS;
 }
 
+NTSTATUS esync_query_mutex( HANDLE handle, void *info, ULONG *ret_len )
+{
+    struct esync *obj;
+    struct mutex *mutex;
+    MUTANT_BASIC_INFORMATION *out = info;
+    NTSTATUS ret;
+
+    TRACE("handle %p, info %p, ret_len %p.\n", handle, info, ret_len);
+
+    if ((ret = get_object( handle, &obj ))) return ret;
+    mutex = obj->shm;
+
+    out->CurrentCount = 1 - mutex->count;
+    out->OwnedByCaller = (mutex->tid == GetCurrentThreadId());
+    out->AbandonedState = FALSE;
+    if (ret_len) *ret_len = sizeof(*out);
+
+    return STATUS_SUCCESS;
+}
+
 #define TICKSPERSEC        10000000
 #define TICKSPERMSEC       10000
 

dlls/ntdll/unix/esync.h

@@ -41,6 +41,7 @@ extern NTSTATUS esync_create_mutex( HANDLE *handle, ACCESS_MASK access,
     const OBJECT_ATTRIBUTES *attr, BOOLEAN initial ) DECLSPEC_HIDDEN;
 extern NTSTATUS esync_open_mutex( HANDLE *handle, ACCESS_MASK access,
     const OBJECT_ATTRIBUTES *attr ) DECLSPEC_HIDDEN;
+extern NTSTATUS esync_query_mutex( HANDLE handle, void *info, ULONG *ret_len ) DECLSPEC_HIDDEN;
 extern NTSTATUS esync_release_mutex( HANDLE *handle, LONG *prev ) DECLSPEC_HIDDEN;
 
 extern NTSTATUS esync_wait_objects( DWORD count, const HANDLE *handles, BOOLEAN wait_any,

dlls/ntdll/unix/sync.c

@@ -658,6 +658,9 @@ NTSTATUS WINAPI NtQueryMutant( HANDLE handle, MUTANT_INFORMATION_CLASS class,
 
     if (len != sizeof(MUTANT_BASIC_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
 
+    if (do_esync())
+        return esync_query_mutex( handle, info, ret_len );
+
     SERVER_START_REQ( query_mutex )
     {
         req->handle = wine_server_obj_handle( handle );