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/* $Id$ */
/** @file
* IPRT - Save and Restore Error Variables, POSIX Ring-3.
*/
/*
* Copyright (C) 2011-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <netdb.h>
#include <errno.h>
#include <iprt/errcore.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
#include "internal/magics.h"
RTDECL(PRTERRVARS) RTErrVarsSave(PRTERRVARS pVars)
{
pVars->ai32Vars[0] = RTERRVARS_MAGIC;
pVars->ai32Vars[1] = errno;
pVars->ai32Vars[2] = h_errno;
return pVars;
}
RTDECL(void) RTErrVarsRestore(PCRTERRVARS pVars)
{
AssertReturnVoid(pVars->ai32Vars[0] == RTERRVARS_MAGIC);
h_errno = pVars->ai32Vars[2];
errno = pVars->ai32Vars[1];
}
RTDECL(bool) RTErrVarsAreEqual(PCRTERRVARS pVars1, PCRTERRVARS pVars2)
{
Assert(pVars1->ai32Vars[0] == RTERRVARS_MAGIC);
Assert(pVars2->ai32Vars[0] == RTERRVARS_MAGIC);
return pVars1->ai32Vars[0] == pVars2->ai32Vars[0]
&& pVars1->ai32Vars[1] == pVars2->ai32Vars[1]
&& pVars1->ai32Vars[2] == pVars2->ai32Vars[2];
}
RTDECL(bool) RTErrVarsHaveChanged(PCRTERRVARS pVars)
{
Assert(pVars->ai32Vars[0] == RTERRVARS_MAGIC);
return pVars->ai32Vars[0] != RTERRVARS_MAGIC
|| pVars->ai32Vars[1] != errno
|| pVars->ai32Vars[2] != h_errno;
}
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