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This commit was SVN r699.
Этот коммит содержится в:
David Daniel 2004-02-10 20:00:34 +00:00
родитель 3b9e7525ea
Коммит a3eef8ee5c

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@ -3,7 +3,9 @@
*/
/**
* @file:
* @file
*
* Simple C-language object-oriented system.
*
* Simple C-language object-oriented system with single inheritance
* and ownership-based memory management using a retain/release model.
@ -12,7 +14,7 @@
* descriptor. The first element of the struct must be the parent
* class's struct. The class descriptor must be given a well-known
* name based upon the class struct name: If the struct is sally_t,
* the class info descriptor should be xxx_t_class_info.
* the class info descriptor should be sally_t_class_info.
*
* (a) To define a class
*
@ -20,6 +22,7 @@
* should always be the parent class, and be called "super",
* for example
*
* @code
* typedef struct sally_t sally_t;
* struct sally_t
* {
@ -29,6 +32,7 @@
* };
*
* extern lam_class_info_t sally_t_class_info;
* @endcode
*
* All classes must have a parent.
*
@ -36,12 +40,14 @@
* for this class, and should be the name of the class with
* "_class_info" appended:
*
* @code
* lam_class_info_t sally_t_class_info = {
* "sally_t",
* CLASS_INFO(parent_t), // pointer to parent_t_class_info
* sally_construct,
* sally_destruct
* };
* @endcode
*
* This variable should be publically advertised using the "extern"
* statement in the interface file as shown above.
@ -53,12 +59,16 @@
* The first thing sally_construct should do is run its parent's
* constructor using the OBJ_CONSTRUCT_SUPER macro:
*
* @code
* OBJ_CONSTRUCT_SUPER(obj, type_of_parent);
* @endcode
*
* Similarly, the las thing sally_destruct should do is run its
* parents' destructor.
*
* @code
* OBJ_DESTRUCT_SUPER(obj, type_of_parent);
* @endcode
*
* Other class methods may be added to the struct.
*
@ -66,7 +76,9 @@
*
* To create a instance of a class (an object) use OBJ_NEW:
*
* @code
* sally_t *sally = OBJ_NEW(sally_t);
* @endcode
*
* which allocates memory of sizeof(sally_t) and runs the class's
* "init" method.
@ -74,9 +86,11 @@
* Use OBJ_RETAIN, OBJ_RELEASE to do reference-count-based
* memory management:
*
* @code
* OBJ_RETAIN(sally);
* OBJ_RELEASE(sally);
* OBJ_RELEASE(sally);
* @endcode
*
* When the reference count reaches zero, the class's "fini" method
* is run and the memory is freed.
@ -90,15 +104,19 @@
* necessary to initialize the memory, which is done using
* OBJ_CONSTRUCT:
*
* @code
* sally_t sally;
*
* OBJ_CONSTRUCT(&sally, sally_t);
* @endcode
*
* The retain/release model is not necessary here, but before the
* object goes out of scope, OBJ_DESTRUCT should be run to release
* initialized resources:
*
* @code
* OBJ_DESTRUCT(&sally);
* @endcode
*/
#ifndef LAM_OBJECT_H
@ -119,6 +137,10 @@ typedef struct lam_class_info_t lam_class_info_t;
typedef void (*lam_construct_t) (lam_object_t *);
typedef void (*lam_destruct_t) (lam_object_t *);
/**
* Class descriptor. This structure should be instantiated once for each class.
*/
struct lam_class_info_t {
const char *cls_name;
lam_class_info_t *cls_parent;