\begin{verbatim}
bool MyApp::OnInit()
{
- m_checker = new wxSingleInstanceChecker(GetAppName());
+ const wxString name = wxString::Format("MyApp-%s", wxGetUserId().c_str());
+ m_checker = new wxSingleInstanceChecker(name);
if ( m_checker->IsAnotherRunning() )
{
wxLogError(_("Another program instance is already running, aborting."));
}
\end{verbatim}
-This class is implemented for Win32 and Unix platforms supporting {\tt fcntl()}
-system call only.
+Note using \helpref{wxGetUserId()}{wxgetuserid} to construct the name: this
+allows different user to run the application concurrently which is usually the
+intended goal. If you don't use the user name in the wxSingleInstanceChecker
+name, only one user would be able to run the application at a time.
+
+This class is implemented for Win32 and Unix platforms (supporting {\tt fcntl()}
+system call, but almost all of modern Unix systems do) only.
\wxheading{Derived from}
No base class
-\wxheading{Data structures}
+\wxheading{Include files}
+
+<wx/snglinst.h>
\latexignore{\rtfignore{\wxheading{Members}}}
\wxheading{Parameters}
-\docparam{name}{must be given and be as unique as possible, it is used as the
+\docparam{name}{must be given and be as unique as possible. It is used as the
mutex name under Win32 and the lock file name under Unix.
-\helpref{GetAppName()}{wxappgetappname} may be a good value for this parameter}
+\helpref{GetAppName()}{wxappgetappname} and \helpref{wxGetUserId()}{wxgetuserid}
+are commonly used to construct this parameter.}
\docparam{path}{is optional and is ignored under Win32 and used as the directory to
create the lock file in under Unix (default is
-\helpref{wxGetHomeDir()}{wxgethomedir})
+\helpref{wxGetHomeDir()}{wxgethomedir})}
\wxheading{Return value}