78 lines
1.7 KiB
C++
78 lines
1.7 KiB
C++
/***
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*stddef.h - definitions/declarations for common constants, types, variables
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* This file contains definitions and declarations for some commonly
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* used constants, types, and variables.
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* [ANSI]
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*
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* [Public]
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*
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****/
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#pragma once
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#ifndef _INC_STDDEF
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#define _INC_STDDEF
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#include <crtdefs.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* Define NULL pointer value */
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else /* __cplusplus */
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#define NULL ((void *)0)
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#endif /* __cplusplus */
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#endif /* NULL */
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#ifdef __cplusplus
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namespace std { typedef decltype(__nullptr) nullptr_t; }
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using ::std::nullptr_t;
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#endif /* __cplusplus */
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/* Declare reference to errno */
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#ifndef _CRT_ERRNO_DEFINED
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#define _CRT_ERRNO_DEFINED
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_CRTIMP extern int * __cdecl _errno(void);
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#define errno (*_errno())
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errno_t __cdecl _set_errno(_In_ int _Value);
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errno_t __cdecl _get_errno(_Out_ int * _Value);
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#endif /* _CRT_ERRNO_DEFINED */
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/* Define offsetof macro */
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#ifdef __cplusplus
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#ifdef _WIN64
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#define offsetof(s,m) (size_t)( (ptrdiff_t)&reinterpret_cast<const volatile char&>((((s *)0)->m)) )
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#else /* _WIN64 */
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#define offsetof(s,m) (size_t)&reinterpret_cast<const volatile char&>((((s *)0)->m))
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#endif /* _WIN64 */
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#else /* __cplusplus */
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#ifdef _WIN64
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#define offsetof(s,m) (size_t)( (ptrdiff_t)&(((s *)0)->m) )
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#else /* _WIN64 */
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#define offsetof(s,m) (size_t)&(((s *)0)->m)
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#endif /* _WIN64 */
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#endif /* __cplusplus */
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_CRTIMP extern unsigned long __cdecl __threadid(void);
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#define _threadid (__threadid())
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_CRTIMP extern uintptr_t __cdecl __threadhandle(void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* _INC_STDDEF */
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