include/wx/snglinst.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/snglinst.h
   3 // Purpose:     wxSingleInstanceChecker can be used to restrict the number of
   4 //              simultaneously running copies of a program to one
   5 // Author:      Vadim Zeitlin
   6 // Modified by:
   7 // Created:     08.06.01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  10 // Licence:     wxWindows licence
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_SNGLINST_H_
  14 #define _WX_SNGLINST_H_
  15
  16 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  17     #pragma interface "snglinst.h"
  18 #endif
  19
  20 #if wxUSE_SNGLINST_CHECKER
  21
  22 // ----------------------------------------------------------------------------
  23 // wxSingleInstanceChecker
  24 // ----------------------------------------------------------------------------
  25
  26 class WXDLLIMPEXP_BASE wxSingleInstanceChecker
  27 {
  28 public:
  29     // default ctor, use Create() after it
  30     wxSingleInstanceChecker() { Init(); }
  31
  32     // like Create() but no error checking (dangerous!)
  33     wxSingleInstanceChecker(const wxString& name,
  34                             const wxString& path = wxEmptyString)
  35     {
  36         Init();
  37         Create(name, path);
  38     }
  39
  40     // name must be given and be as unique as possible, it is used as the mutex
  41     // name under Win32 and the lock file name under Unix -
  42     // wxTheApp->GetAppName() may be a good value for this parameter
  43     //
  44     // path is optional and is ignored under Win32 and used as the directory to
  45     // create the lock file in under Unix (default is wxGetHomeDir())
  46     //
  47     // returns FALSE if initialization failed, it doesn't mean that another
  48     // instance is running - use IsAnotherRunning() to check it
  49     bool Create(const wxString& name, const wxString& path = wxEmptyString);
  50
  51     // is another copy of this program already running?
  52     bool IsAnotherRunning() const;
  53
  54     // dtor is not virtual, this class is not meant to be used polymorphically
  55     ~wxSingleInstanceChecker();
  56
  57 private:
  58     // common part of all ctors
  59     void Init() { m_impl = NULL; }
  60
  61     // the implementation details (platform specific)
  62     class WXDLLIMPEXP_BASE wxSingleInstanceCheckerImpl *m_impl;
  63
  64     DECLARE_NO_COPY_CLASS(wxSingleInstanceChecker)
  65 };
  66
  67 #endif // wxUSE_SNGLINST_CHECKER
  68
  69 #endif // _WX_SNGLINST_H_