--- /dev/null
+/*
+ * Copyright (c) 1994 by Xerox Corporation. All rights reserved.
+ * Copyright (c) 1996 by Silicon Graphics. All rights reserved.
+ * Copyright (c) 1998 by Fergus Henderson. All rights reserved.
+ * Copyright (c) 2000-2009 by Hewlett-Packard Development Company.
+ * All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+#ifndef GC_DARWIN_STOP_WORLD_H
+#define GC_DARWIN_STOP_WORLD_H
+
+#if !defined(GC_DARWIN_THREADS)
+# error darwin_stop_world.h included without GC_DARWIN_THREADS defined
+#endif
+
+#include <mach/mach.h>
+#include <mach/thread_act.h>
+
+struct thread_stop_info {
+ mach_port_t mach_thread;
+ ptr_t stack_ptr; /* Valid only when thread is in a "blocked" state. */
+};
+
+#ifndef DARWIN_DONT_PARSE_STACK
+ GC_INNER ptr_t GC_FindTopOfStack(unsigned long);
+#endif
+
+#ifdef MPROTECT_VDB
+ GC_INNER void GC_mprotect_stop(void);
+ GC_INNER void GC_mprotect_resume(void);
+#endif
+
+#if defined(PARALLEL_MARK) && !defined(GC_NO_THREADS_DISCOVERY)
+ GC_INNER GC_bool GC_is_mach_marker(thread_act_t);
+#endif
+
+#endif