/*

 * 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