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Questions about __setNoDelete()

OrNotOrNot Member Bin.LiOrganization: GE HealthcareProject: Enterprise solution
hi,
Although the Manu p215 has given some explainations about the __setNoDelete, I am not very clear yet :confused: . Could you please say a little more on it?
Moreover,in the source file Blobject.cpp , I can not understand why using two __setNoDelete(false) methods in the constructor of the blobject while without __setNoDelete(true).

Thank you very much.
OrNot

Comments

  • michimichi Member Michi HenningOrganization: Triodia TechnologiesProject: I have a passing interest in Ice :-) ✭✭✭
    OrNot wrote:
    Although the Manu p215 has given some explainations about the __setNoDelete, I am not very clear yet :confused: . Could you please say a little more on it?

    There really isn't much to say. __setNoDelete simply prevents deletion of an object if the last smart pointer to it goes out of scope. You can check the implemention by looking at IceUtil/Shared.h.
    Moreover,in the source file Blobject.cpp , I can not understand why using two __setNoDelete(false) methods in the constructor of the blobject while without __setNoDelete(true).

    Sorry, but you'll have to be more precise. There is no file Blobject.cpp, only Object.cpp (in which Blobject is implemented). But Blobject has neither a constructor, nor are there any calls to __setNoDelete in Object.cpp. So I'm not sure which part of the code you mean.

    Cheers,

    Michi.
  • OrNotOrNot Member Bin.LiOrganization: GE HealthcareProject: Enterprise solution
    hi, Michi,
    Here are the codes excerpted from Blobject.cpp, an implementation file of Glacier2.

    Glacier2::Blobject::Blobject(const CommunicatorPtr& communicator, bool reverse) :
    _communicator(communicator),
    _properties(_communicator->getProperties()),
    _logger(_communicator->getLogger()),
    _reverse(reverse),
    _forwardContext(_reverse ?
    _properties->getPropertyAsInt(serverForwardContext) > 0 :
    _properties->getPropertyAsInt(clientForwardContext) > 0),
    _buffered(_reverse ?
    _properties->getPropertyAsIntWithDefault(serverBuffered, 1) > 0 :
    _properties->getPropertyAsIntWithDefault(clientBuffered, 1) > 0),
    _alwaysBatch(_reverse ?
    _properties->getPropertyAsInt(serverAlwaysBatch) > 0 :
    _properties->getPropertyAsInt(clientAlwaysBatch) > 0),
    _requestTraceLevel(_reverse ?
    _properties->getPropertyAsInt(serverTraceRequest) :
    _properties->getPropertyAsInt(clientTraceRequest)),
    _overrideTraceLevel(reverse ?
    _properties->getPropertyAsInt(serverTraceOverride) :
    _properties->getPropertyAsInt(clientTraceOverride))
    {
    if(_buffered)
    {
    try
    {
    IceUtil::Time sleepTime = _reverse ?
    IceUtil::Time::milliSeconds(_properties->getPropertyAsInt(serverSleepTime)) :
    IceUtil::Time::milliSeconds(_properties->getPropertyAsInt(clientSleepTime));

    _requestQueue = new RequestQueue(sleepTime);

    Int threadStackSize = _properties->getPropertyAsInt("Ice.ThreadPerConnection.StackSize");

    _requestQueue->start(static_cast<size_t>(threadStackSize));

    //
    // See the comment in Glacier2::RequestQueue::destroy()
    // for why we detach the thread.
    //
    _requestQueue->getThreadControl().detach();
    }
    catch(const IceUtil::Exception& ex)
    {
    {
    Error out(_logger);
    out << "cannot create thread for request queue:\n" << ex;
    }

    if(_requestQueue)
    {
    _requestQueue->destroy();
    _requestQueue = 0;
    }

    __setNoDelete(false);
    throw;
    }
    __setNoDelete(false);
    }
    }


    There may lack of a __setNoDelete(true) before the try block. But I am not very sure.

    Best regards
    OrNot
  • matthewmatthew NL, CanadaMember Matthew NewhookOrganization: ZeroC, Inc.Project: Internet Communications Engine ✭✭✭
    That looks like some old code that should have been removed. At any rate, they won't do any harm.

    Regards, Matthew
  • OrNotOrNot Member Bin.LiOrganization: GE HealthcareProject: Enterprise solution
    hi,Matthew,
    The codes come from 2.1.2. That file was last updated on 04-02-2005. Isn't it the newest version?
  • matthewmatthew NL, CanadaMember Matthew NewhookOrganization: ZeroC, Inc.Project: Internet Communications Engine ✭✭✭
    Yes, its the newest version.

    Matthew
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