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#ifndef _DBAUI_MODULE_DBU_HXX_
#define _DBAUI_MODULE_DBU_HXX_

#include <osl/mutex.hxx>
#include <tools/resid.hxx>
#include <sal/macros.h>

class ResMgr;

//.........................................................................
namespace dbaui
{
//.........................................................................

//=========================================================================
//= OModule
//=========================================================================
class OModuleImpl;
class OModule
{
    friend class OModuleClient;

private:
    OModule();
        // not implemented. OModule is a static class

protected:
    static ::osl::Mutex s_aMutex;       /// access safety
    static sal_Int32    s_nClients;     /// number of registered clients
    static OModuleImpl* s_pImpl;        /// impl class. lives as long as at least one client for the module is registered

public:
    /// get the vcl res manager of the module
    static ResMgr*  getResManager();

protected:
    /// register a client for the module
    static void registerClient();
    /// revoke a client for the module
    static void revokeClient();

private:
    /** ensure that the impl class exists
        @precond m_aMutex is guarded when this method gets called
    */
    static void ensureImpl();
};

//=========================================================================
//= OModuleClient
//=========================================================================
/** base class for objects which uses any global module-specific ressources
*/
class OModuleClient
{
public:
    OModuleClient()     { OModule::registerClient(); }
    ~OModuleClient()    { OModule::revokeClient(); }
};

//=========================================================================
//= ModuleRes
//=========================================================================
/** specialized ResId, using the ressource manager provided by the global module
*/
class ModuleRes : public ::ResId
{
public:
    ModuleRes(USHORT _nId) : ResId(_nId, *OModule::getResManager()) { }
};

//.........................................................................
}   // namespace dbaui
//.........................................................................

#endif // _DBAUI_MODULE_DBU_HXX_

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