huwcampbell.com
Reactos
1/*
2 * PROJECT: ReactOS vcruntime library
3 * LICENSE: MIT (https://spdx.org/licenses/MIT)
4 * PURPOSE: Implementation of _get_purecall_handler, _set_purecall_handler and _purecall function
5 * COPYRIGHT: Copyright 2025 Timo Kreuzer <timo.kreuzer@reactos.org>
6 */
7
8#include <stdlib.h>
9#include <intrin.h>
10
11static volatile _purecall_handler purecall_handler;
12
13extern "C"
14_purecall_handler _cdecl _get_purecall_handler(void)
15{
16 return purecall_handler;
17}
18
19extern "C"
20_purecall_handler _cdecl _set_purecall_handler(_In_opt_ _purecall_handler _Handler)
21{
22 return reinterpret_cast<_purecall_handler>(
23 _InterlockedExchangePointer(reinterpret_cast<void* volatile*>(&purecall_handler),
24 reinterpret_cast<void*>(_Handler)));
25}
26
27extern "C"
28int __cdecl _purecall(void)
29{
30 _purecall_handler handler = purecall_handler;
31 if (handler)
32 handler();
33 abort();
34}