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SaveErrno.h

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#ifndef CLASSLIB_SAVE_ERRNO_H
# define CLASSLIB_SAVE_ERRNO_H

//<<<<<< INCLUDES                                                       >>>>>>

# include "classlib/sysapi/system.h"
# ifdef _WIN32
#  include <windows.h>
# endif
# include <cerrno>

namespace lat {
//<<<<<< PUBLIC DEFINES                                                 >>>>>>
//<<<<<< PUBLIC CONSTANTS                                               >>>>>>
//<<<<<< PUBLIC TYPES                                                   >>>>>>
//<<<<<< PUBLIC VARIABLES                                               >>>>>>
//<<<<<< PUBLIC FUNCTIONS                                               >>>>>>
//<<<<<< CLASS DECLARATIONS                                             >>>>>>

class SaveErrno
{
public:
    SaveErrno (void);
    ~SaveErrno (void);
    // implicit copy constructor
    // implicit assignment operator

private:
    int         m_errno;
    int         m_winerr;
};

//<<<<<< INLINE PUBLIC FUNCTIONS                                        >>>>>>
//<<<<<< INLINE MEMBER FUNCTIONS                                        >>>>>>

inline
SaveErrno::SaveErrno (void)
{
    m_errno = errno;
# ifdef _WIN32
    m_winerr = GetLastError ();
# endif
}

inline
SaveErrno::~SaveErrno (void)
{
    errno = m_errno;
# ifdef _WIN32
    SetLastError (m_winerr);
# endif
}

} // namespace lat
#endif // CLASSLIB_SAVE_ERRNO_H

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