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/* spw3i6.c: STACK PROBE FOR 64-BIT WINDOWS
*
* $Id$
* Copyright (c) 2013-2020 Ravenbrook Limited. See end of file for license.
*
* The function StackProbe ensures that the stack has at least depth
* words available. It achieves this by exploiting an obscure but
* documented feature of Microsoft's function _alloca: "A stack
* overflow exception is generated if the space cannot be allocated."
* <https://docs.microsoft.com/en-gb/cpp/c-runtime-library/reference/alloca>
*/
#include "mpm.h"
#if !defined(MPS_OS_W3)
#error "spw3i6.c is specific to MPS_OS_W3"
#endif
#include <stdlib.h> /* _alloca */
void StackProbe(Size depth)
{
(void)_alloca(depth * sizeof(Word));
}
/* C. COPYRIGHT AND LICENSE
*
* Copyright (C) 2013-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
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