Hooks execution

If a given component supports pre- and post-method invocation instrumentation, also known as ``hooks'', their execution can be enabled or disabled at runtime through the built-in _set_hooks method. For example, given the following SIDL specification$:$


package hooks version 1.0
{
  class Basics {
    /**
     * Basic illustration of hooks for static methods.
     */
    static int aStaticMeth(in int i, out int o, inout int io);

    /**
     * Basic illustration of hooks for static methods.
     */
    int aNonStaticMeth(in int i, out int o, inout int io);
  }
}

which has a single static function and a member function for the Basics class, the processes for enabling and disabling execution of the implementation-specific hooks are$:$


  hooks_Basics obj;
  sidl_BaseInterface _ex = NULL;

  obj = hooks_Basics__create(&exception); SIDL_CHECK(exception);

  /* Enable hooks execution (enabled by default if hooks generated) */
  /* ... for static methods */
  hooks_Basics__set_hooks_static(TRUE, &_ex); SIDL_CHECK(exception);

  /* ... for non-static methods */
  hooks_Basics__set_hooks(obj, TRUE, &_ex); SIDL_CHECK(exception);


  /* ...do something meaningful... */


  /* Disable hooks execution */
  /* ... for static methods */
  hooks_Basics__set_hooks_static(FALSE, &_ex); SIDL_CHECK(exception);

  /* ... for non-static methods */
  hooks_Basics__set_hooks(obj, FALSE, &_ex); SIDL_CHECK(exception);


  /* ...do something meaningful... */

It is important to keep in mind that the _set_hooks_static method must be used to enable/disable invocation of hooks for static methods and the _set_hooks method must be used for those of non-static methods. Also, Babel does not provide client access to the _pre and _post methods; therefore, they cannot be invoked directly. More information on the instrumentation process is provided in Subsection 6.4.5.





babel-1.4.0
users_guide Last Modified 2008-10-16

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