00001 // -*- C++ -*- 00002 00003 //============================================================================= 00004 /** 00005 * @file Non_Servant_Upcall.h 00006 * 00007 * $Id: Non_Servant_Upcall.h 71473 2006-03-10 07:19:20Z jtc $ 00008 * 00009 * @author Irfan Pyarali 00010 */ 00011 //============================================================================= 00012 00013 #ifndef TAO_NONSERVANT_UPCALL_H 00014 #define TAO_NONSERVANT_UPCALL_H 00015 00016 #include /**/ "ace/pre.h" 00017 00018 #include "tao/PortableServer/portableserver_export.h" 00019 00020 #if !defined (ACE_LACKS_PRAGMA_ONCE) 00021 # pragma once 00022 #endif /* ACE_LACKS_PRAGMA_ONCE */ 00023 00024 #include "tao/orbconf.h" 00025 00026 TAO_BEGIN_VERSIONED_NAMESPACE_DECL 00027 00028 // Forward declaration 00029 class TAO_Root_POA; 00030 class TAO_Object_Adapter; 00031 00032 namespace TAO 00033 { 00034 namespace Portable_Server 00035 { 00036 /** 00037 * @class Non_Servant_Upcall 00038 * 00039 * @brief This class helps us with a recursive thread lock without 00040 * using a recursive thread lock. Non_Servant_Upcall has a 00041 * magic constructor and destructor. We unlock the 00042 * Object_Adapter lock for the duration of the non-servant 00043 * (i.e., adapter activator and servant activator) upcalls; 00044 * reacquiring once the upcalls complete. Even though we are 00045 * releasing the lock, other threads will not be able to make 00046 * progress since 00047 * <Object_Adapter::non_servant_upcall_in_progress_> has been 00048 * set. 00049 */ 00050 class TAO_PortableServer_Export Non_Servant_Upcall 00051 { 00052 public: 00053 00054 /// Constructor. 00055 Non_Servant_Upcall (::TAO_Root_POA &poa); 00056 00057 /// Destructor. 00058 ~Non_Servant_Upcall (void); 00059 00060 ::TAO_Root_POA &poa (void) const; 00061 00062 protected: 00063 00064 TAO_Object_Adapter &object_adapter_; 00065 TAO_Root_POA &poa_; 00066 Non_Servant_Upcall *previous_; 00067 }; 00068 } 00069 } 00070 00071 TAO_END_VERSIONED_NAMESPACE_DECL 00072 00073 #if defined (__ACE_INLINE__) 00074 # include "tao/PortableServer/Non_Servant_Upcall.inl" 00075 #endif /* __ACE_INLINE__ */ 00076 00077 #include /**/ "ace/post.h" 00078 00079 #endif /* TAO_NONSERVANT_UPCALL_H */