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1//
2// new_mode.cpp
3//
4// Copyright (c) Microsoft Corporation. All rights reserved.
5//
6// Definition of _set_new_mode and _query_new_mode, which provide access to the
7// _newmode global flag.
8//
9#include <corecrt_internal.h>
10#include <new.h>
11
12
13
14static __crt_state_management::dual_state_global<long> __acrt_global_new_mode;
15
16
17
18// Sets the _newmode flag to the new value 'mode' and return the old mode.
19extern "C" int __cdecl _set_new_mode(int const mode)
20{
21 // The only valid values of _newmode are 0 and 1:
22 _VALIDATE_RETURN(mode == 0 || mode == 1, EINVAL, -1);
23
24 return static_cast<int>(_InterlockedExchange(&__acrt_global_new_mode.value(), mode));
25}
26
27// Gets the current value of the _newmode flag.
28extern "C" int __cdecl _query_new_mode()
29{
30 return static_cast<int>(__crt_interlocked_read(&__acrt_global_new_mode.value()));
31}