ntdll: Implement NtSignalAndWaitForSingleObject().

dlls/ntdll/unix/esync.c

@@ -843,6 +843,34 @@ NTSTATUS esync_wait_objects( DWORD count, const HANDLE *handles, BOOLEAN wait_an
     return ret;
 }
 
+NTSTATUS esync_signal_and_wait( HANDLE signal, HANDLE wait, BOOLEAN alertable,
+    const LARGE_INTEGER *timeout )
+{
+    struct esync *obj;
+    NTSTATUS ret;
+
+    if ((ret = get_object( signal, &obj ))) return ret;
+
+    switch (obj->type)
+    {
+    case ESYNC_SEMAPHORE:
+        ret = esync_release_semaphore( signal, 1, NULL );
+        break;
+    case ESYNC_AUTO_EVENT:
+    case ESYNC_MANUAL_EVENT:
+        ret = esync_set_event( signal );
+        break;
+    case ESYNC_MUTEX:
+        ret = esync_release_mutex( signal, NULL );
+        break;
+    default:
+        return STATUS_OBJECT_TYPE_MISMATCH;
+    }
+    if (ret) return ret;
+
+    return esync_wait_objects( 1, &wait, TRUE, alertable, timeout );
+}
+
 void esync_init(void)
 {
     struct stat st;

dlls/ntdll/unix/esync.h

@@ -37,6 +37,8 @@ extern NTSTATUS esync_release_mutex( HANDLE *handle, LONG *prev ) DECLSPEC_HIDDE
 
 extern NTSTATUS esync_wait_objects( DWORD count, const HANDLE *handles, BOOLEAN wait_any,
                                     BOOLEAN alertable, const LARGE_INTEGER *timeout ) DECLSPEC_HIDDEN;
+extern NTSTATUS esync_signal_and_wait( HANDLE signal, HANDLE wait, BOOLEAN alertable,
+    const LARGE_INTEGER *timeout ) DECLSPEC_HIDDEN;
 
 
 /* We have to synchronize on the fd cache mutex so that our calls to receive_fd

dlls/ntdll/unix/sync.c

@@ -1480,6 +1480,9 @@ NTSTATUS WINAPI NtSignalAndWaitForSingleObject( HANDLE signal, HANDLE wait,
     select_op_t select_op;
     UINT flags = SELECT_INTERRUPTIBLE;
 
+    if (do_esync())
+        return esync_signal_and_wait( signal, wait, alertable, timeout );
+
     if (!signal) return STATUS_INVALID_HANDLE;
 
     if (alertable) flags |= SELECT_ALERTABLE;