Base Object

Collaboration diagram for Base Object:

Detailed Description

HAL uses concepts of Object Oriented Programming even if it is written in C. Things like simple inheritance, multiple inheritance and interfaces are used through the system. This module defines a "base object" that is the ancestor of all classes in the system.

Macros
#define	_base_object_methods
	BaseObject specific methods. More...
#define	_base_object_data
	BaseObject specific data. More...

Macro Functions (BaseObject)
#define	objGetInstance(type, ip)   (type)(((size_t)(ip)) - (ip)->vmt->instance_offset)
	Returns the instance pointer starting from an interface pointer. More...

Data Structures
struct	BaseObjectVMT
	BaseObject virtual methods table. More...
struct	BaseObject
	Base stream class. More...

Macro Definition Documentation

#define _base_object_methods

Value:

/* Instance offset, used for multiple inheritance, normally zero. It
     represents the offset between the current object and the container
     object*/                                                               \
  size_t instance_offset;

BaseObject specific methods.

Note

This object defines no methods.

Definition at line 39 of file hal_objects.h.

#define _base_object_data

BaseObject specific data.

Note

This object defines no data.

Definition at line 49 of file hal_objects.h.

#define objGetInstance	(		type,
			ip
	)		(type)(((size_t)(ip)) - (ip)->vmt->instance_offset)

Returns the instance pointer starting from an interface pointer.

Parameters

[in]	type	the type of the instance pointer, it is used for casting
[in]	ip	the interface pointer

Returns

A pointer to the object implementing the interface

Definition at line 80 of file hal_objects.h.