/* the machine context */
-#if defined(__EX_MCTX_MCSC__)
+#if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) | defined(__TOS_WIN__)
+#include "xbt/win32_context.h"
+
+#elif defined(__EX_MCTX_MCSC__)
#include <ucontext.h> /* POSIX.1 ucontext(3) */
#define __ex_mctx_struct ucontext_t uc;
#define __ex_mctx_save(mctx) (getcontext(&(mctx)->uc) == 0)