+#ifdef WIN32
+
+#include <winbase.h>
+
+#define GSSEAP_GET_LAST_ERROR() (GetLastError()) /* XXX FIXME */
+
+#define GSSEAP_MUTEX CRITICAL_SECTION
+#define GSSEAP_MUTEX_INIT(m) (InitializeCriticalSection((m)), 0)
+#define GSSEAP_MUTEX_DESTROY(m) DeleteCriticalSection((m))
+#define GSSEAP_MUTEX_LOCK(m) EnterCriticalSection((m))
+#define GSSEAP_MUTEX_UNLOCK(m) LeaveCriticalSection((m))
+#define GSSEAP_ONCE_LEAVE do { return TRUE; } while (0)
+
+/* Thread-local is handled separately */
+
+#define GSSEAP_THREAD_ONCE INIT_ONCE
+#define GSSEAP_ONCE_CALLBACK(cb) BOOL CALLBACK cb(PINIT_ONCE InitOnce, PVOID Parameter, PVOID *Context)
+#define GSSEAP_ONCE(o, i) InitOnceExecuteOnce((o), (i), NULL, NULL)
+#define GSSEAP_ONCE_INITIALIZER INIT_ONCE_STATIC_INIT
+
+#else
+