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+/* Init guards, somewhat like spinlocks (native Windows implementation).
+ Copyright (C) 2005-2022 Free Software Foundation, Inc.
+
+ This file is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ This file is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2005.
+ Based on GCC's gthr-win32.h. */
+
+#ifndef _WINDOWS_INITGUARD_H
+#define _WINDOWS_INITGUARD_H
+
+#define WIN32_LEAN_AND_MEAN /* avoid including junk */
+#include <windows.h>
+
+typedef struct
+ {
+ volatile int done;
+ volatile LONG started;
+ }
+ glwthread_initguard_t;
+
+#define GLWTHREAD_INITGUARD_INIT { 0, -1 }
+
+#endif /* _WINDOWS_INITGUARD_H */