applying patch, fixes #10524

[wxWidgets.git] / src / os2 / snglinst.cpp

///////////////////////////////////////////////////////////////////////////////\r
// Name:        os2/snglinst.cpp\r
// Purpose:     implements wxSingleInstanceChecker class for OS/2 using\r
//              named mutexes\r
// Author:      Vadim Zeitlin\r
// Modified by: Lauri Nurmi (modified for OS/2)\r
// Created:     08.02.2009\r
// RCS-ID:      $Id$\r
// Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>\r
// License:     wxWindows licence\r
///////////////////////////////////////////////////////////////////////////////\r
\r
// ============================================================================\r
// declarations\r
// ============================================================================\r
\r
// ----------------------------------------------------------------------------\r
// headers\r
// ----------------------------------------------------------------------------\r
\r
// For compilers that support precompilation, includes "wx.h".\r
#include "wx/wxprec.h"\r
\r
#ifdef __BORLANDC__\r
    #pragma hdrstop\r
#endif\r
\r
#if wxUSE_SNGLINST_CHECKER\r
\r
#ifndef WX_PRECOMP\r
    #include "wx/string.h"\r
    #include "wx/log.h"\r
#endif //WX_PRECOMP\r
\r
#include "wx/snglinst.h"\r
\r
#define INCL_DOSSEMAPHORES\r
#define INCL_DOSERRORS\r
#include <os2.h>\r
\r
#include "wx/os2/private.h"\r
\r
// ----------------------------------------------------------------------------\r
// wxSingleInstanceCheckerImpl: the real implementation class\r
// ----------------------------------------------------------------------------\r
\r
class WXDLLEXPORT wxSingleInstanceCheckerImpl\r
{\r
public:\r
    wxSingleInstanceCheckerImpl()\r
    {\r
        m_hMutex = NULL;\r
        m_anotherRunning = false;\r
    }\r
\r
    bool Create(const wxString& name)\r
    {\r
        wxString semName;\r
        semName.Printf(wxT("\\SEM32\\%s"), name.c_str());\r
        int rc = DosCreateMutexSem(semName.c_str(), &m_hMutex, DC_SEM_SHARED, 1);\r
\r
        if ( rc == NO_ERROR ) {\r
            m_anotherRunning = false;\r
            return true;\r
        } else if ( rc == ERROR_DUPLICATE_NAME ) {\r
            m_anotherRunning = true;\r
            return true;\r
        } else {\r
            m_anotherRunning = false;  // we don't know for sure in this case\r
            wxLogLastError(_T("DosCreateMutexSem"));\r
            return false;\r
        }\r
    }\r
\r
    bool IsAnotherRunning() const\r
    {\r
        return m_anotherRunning;\r
    }\r
\r
    ~wxSingleInstanceCheckerImpl()\r
    {\r
        if ( m_hMutex )\r
        {\r
            if ( !::DosCloseMutexSem(m_hMutex) )\r
            {\r
                wxLogLastError(_T("DosCloseMutexSem"));\r
            }\r
        }\r
    }\r
\r
private:\r
    // if true, creating the mutex either succeeded\r
    // or we know it failed because another app is running.\r
    bool m_anotherRunning;\r
\r
    // the mutex handle, may be NULL\r
    HMTX m_hMutex;\r
\r
    DECLARE_NO_COPY_CLASS(wxSingleInstanceCheckerImpl)\r
};\r
\r
// ============================================================================\r
// wxSingleInstanceChecker implementation\r
// ============================================================================\r
\r
bool wxSingleInstanceChecker::Create(const wxString& name,\r
                                     const wxString& WXUNUSED(path))\r
{\r
    wxASSERT_MSG( !m_impl,\r
                  _T("calling wxSingleInstanceChecker::Create() twice?") );\r
\r
    // creating unnamed mutex doesn't have the same semantics!\r
    wxASSERT_MSG( !name.empty(), _T("mutex name can't be empty") );\r
\r
    m_impl = new wxSingleInstanceCheckerImpl;\r
\r
    return m_impl->Create(name);\r
}\r
\r
bool wxSingleInstanceChecker::IsAnotherRunning() const\r
{\r
    wxCHECK_MSG( m_impl, false, _T("must call Create() first") );\r
\r
    return m_impl->IsAnotherRunning();\r
}\r
\r
wxSingleInstanceChecker::~wxSingleInstanceChecker()\r
{\r
    delete m_impl;\r
}\r
\r
#endif // wxUSE_SNGLINST_CHECKER\r