CSE775 - Distributed Objects

Lecture #14 - Out-of-Proc Components and Activation

Revised: 2/14/2011
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Syllabus

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Content:

This lecture is concerned with Out-of-Process COM components and their activation.
  1. Syllabus
    Describes topics to be covered, reading material for you to digest before coming to class, and due dates for the assigned projects.
  2. Project #1, Project #2, Final Projects
  3. Apartments and Threading:
    Apartments and Threading Presentation
    Introduces the notion of apartments and their use to manage COM components that many not share the same thread model with their clients.
    Threading Rules

    Component Calls Component
    This document discusses briefly building a workspace with a client that calls a component that, in turn, calls another component.
    ComponentCallsComponent Project
    This project provides all the code used to generate screen shots for the presentation in the previous item. The code provides brief, but useful, examples of the CComQIPtr and CComBSTR classes. I believe this is the best way to build a client for components built with ATL.

    Marshaling Interface Pointers between Client Threads
    You can't pass interface pointers between apartments, without marshaling. To do so breaks the COM threading model. This project shows you how to do that.

  4. Out-of-Process Components:
    OutProc Components Presentation
    Discusses the structure and activation of Out-of-Process components.

    OutProcST Project - SingleThreaded Server
    Demonstrates how Out-of-Process Single-Threaded Server is structured. Uses Windows message loop.
    OutProcMT Project - MultiThreaded Server
    Demonstrates how Out-of-Process Multi-Threaded Server is structured. Uses Win32 events.

    ATL_OutProcST