new logic applies to SetFont(wxNullFont), too

[wxWidgets.git] / docs / latex / wx / crtslock.tex

\section{\class{wxCriticalSectionLocker}}\label{wxcriticalsectionlocker}

This is a small helper class to be used with \helpref{wxCriticalSection}{wxcriticalsection} 
objects. A wxCriticalSectionLocker enters the critical section in the
constructor and leaves it in the destructor making it much more difficult to
forget to leave a critical section (which, in general, will lead to serious
and difficult to debug problems).

Example of using it:

\begin{verbatim}
void Set Foo()
{
    // gs_critSect is some (global) critical section guarding access to the
    // object "foo"
    wxCriticalSectionLocker locker(gs_critSect);

    if ( ... )
    {
        // do something
        ...

        return;
    }

    // do something else
    ...

    return;
}
\end{verbatim}

Without wxCriticalSectionLocker, you would need to remember to manually leave
the critical section before each {\tt return}.

\wxheading{Derived from}

None.

\wxheading{Include files}

<wx/thread.h>

\wxheading{See also}

\helpref{wxCriticalSection}{wxcriticalsection}, 
\helpref{wxMutexLocker}{wxmutexlocker}

\latexignore{\rtfignore{\wxheading{Members}}}

\membersection{wxCriticalSectionLocker::wxCriticalSectionLocker}\label{wxcriticalsectionlockerctor}

\func{}{wxCriticalSectionLocker}{\param{wxCriticalSection\& }{criticalsection}}

Constructs a wxCriticalSectionLocker object associated with given
{\it criticalsection} and enters it.

\membersection{wxCriticalSectionLocker::\destruct{wxCriticalSectionLocker}}\label{wxcriticalsectionlockerdtor}

\func{}{\destruct{wxCriticalSectionLocker}}{\void}

Destructor leaves the critical section.