Source code of Windows XP (NT5)
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#if !defined(FUSION_INC_FUSIONLASTWIN32ERROR_H_INCLUDED_)
#define FUSION_INC_FUSIONLASTWIN32ERROR_H_INCLUDED_
#pragma once
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#include <windows.h>
#if defined(_M_IX86)
inline DWORD FusionpGetLastWin32Error(void) /* This works fine. */ { __asm { mov eax, fs:[0] _TEB.LastErrorValue } }
inline void FusionpGetLastWin32Error( DWORD *pdwLastError ) { *pdwLastError = ::FusionpGetLastWin32Error(); }
/* This works pretty ok. */
__forceinline VOID FusionpSetLastWin32Error(DWORD dw) { NtCurrentTeb()->LastErrorValue = dw; }
inline void FusionpClearLastWin32Error(void) { __asm { mov fs:[0] _TEB.LastErrorValue, 0 } }
#else
inline DWORD FusionpGetLastWin32Error(void) { return ::GetLastError(); }
inline void FusionpGetLastWin32Error( DWORD *pdwLastError ) { *pdwLastError = ::GetLastError(); }
inline VOID FusionpSetLastWin32Error(DWORD dw) { ::SetLastError(dw); }
inline void FusionpClearLastWin32Error(void) { ::SetLastError(ERROR_SUCCESS); }
#endif
#endif
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