NAME

ACE_Managed_Object - Wrapper for interface to allocate an object managed by the ACE_Object_Manager.

SYNOPSIS

#include <ace/Managed_Object.h>

template<class TYPE> class ACE_Managed_Object { public: inline static TYPE *get_preallocated_object ( ACE_Object_Manager::Preallocated_Object id ); inline return &((ACE_Cleanup_Adapter<TYPE> *); inline static TYPE *get_preallocated_array ( ACE_Object_Manager::Preallocated_Array id ); inline return &((ACE_Cleanup_Adapter<TYPE> *); private: inline ACE_UNIMPLEMENTED_FUNC (ACE_Managed_Object ()); friend class this_prevents_compiler_warning_about_only_private_constructors; };

DESCRIPTION

This template class wraps an interface that is used to allocate and access an object that is managed by the ACE_Object_Manager. Because static template member functions are not supported by most compilers, it is a separate (template) class.

This interface is typically used to replace a static object with one that is dynamically allocated. It helps to avoid problems with order of static object construction/destruction. Managed objects won't be allocated until needed, but should be allocated when first needed. And they are destroyed in the reverse order of construction.

get_preallocated_object () accesses a "preallocated" object, i.e., one that is identified by a value in the ACE_Object_Manager:: Preallocated_Object enum. These objects are used internally by the ACE library.

Hooks are provided for the application to preallocate objects via the same mechanism. ACE_APPLICATION_PREALLOCATED_OBJECT_DECLARATIONS can be used to define enum values; ACE_APPLICATION_PREALLOCATED_OBJECT_DEFINITIONS can be used to define the corresponding objects. The format of the ACE internal library definitions should be followed. And similarly, ACE_APPLICATION_PREALLOCATED_ARRAY_DECLARATIONS and ACE_APPLICATION_PREALLOCATED_ARRAY_DEFINITIONS can be used to preallocate arrays.

By default, preallocation uses dynamic allocation. The preallocated objects and arrays are allocated off the heap in the ACE_Object_Manager constructor. The statically place the preallocated objects in program global data instead of on the heap, #define ACE_HAS_STATIC_PREALLOCATION prior to building the ACE library.

PUBLIC MEMBERS

inline static TYPE *get_preallocated_object (
    ACE_Object_Manager::Preallocated_Object id
    );

inline return &((ACE_Cleanup_Adapter<TYPE> *);

inline static TYPE *get_preallocated_array (
    ACE_Object_Manager::Preallocated_Array id
    );

inline return &((ACE_Cleanup_Adapter<TYPE> *);

PRIVATE MEMBERS

inline ACE_UNIMPLEMENTED_FUNC (ACE_Managed_Object ());

    friend class this_prevents_compiler_warning_about_only_private_constructors;
    

AUTHORS

David L. Levine

LIBRARY

ace