/* sp.h: STACK PROBE INTERFACE
 *
 * $Id$
 * Copyright (c) 2014-2016 Ravenbrook Limited.  See end of file for license.
 */

#ifndef sp_h
#define sp_h

#include "mpmtypes.h"


/* StackProbe -- probe above the stack to provoke early stack overflow
 *
 * This function should check that the stack has at least depth words
 * available, and if not, then provoke a stack overflow exception or
 * protection fault. The purpose is to ensure that the exception is
 * generated before taking the arena lock where it can be handled
 * safely, rather than at some later point where the arena lock is
 * held and so handling the exception may cause the MPS to be entered
 * recursively.
 */

extern void StackProbe(Size depth);


#endif /* sp_h */


/* C. COPYRIGHT AND LICENSE
 *
 * Copyright (C) 2014-2016 Ravenbrook Limited <http://www.ravenbrook.com/>.
 * All rights reserved.  This is an open source license.  Contact
 * Ravenbrook for commercial licensing options.
 * 
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 * modification, are permitted provided that the following conditions are
 * met:
 * 
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 * 
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 * 
 * 3. Redistributions in any form must be accompanied by information on how
 * to obtain complete source code for this software and any accompanying
 * software that uses this software.  The source code must either be
 * included in the distribution or be available for no more than the cost
 * of distribution plus a nominal fee, and must be freely redistributable
 * under reasonable conditions.  For an executable file, complete source
 * code means the source code for all modules it contains. It does not
 * include source code for modules or files that typically accompany the
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