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xo-alloc xo-object: + Object.self_tp

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This commit is contained in:
Roland Conybeare 2025-08-06 14:11:28 -05:00
commit 150bfa4aa2
11 changed files with 76 additions and 14 deletions
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1
xo-alloc/include/xo/alloc/Forwarding1.hpp
View file

@ -12,6 +12,7 @@ namespace xo {
explicit Forwarding1(gp<Object> dest);
// inherited from Object..
virtual TaggedPtr self_tp() const final override;
virtual bool _is_forwarded() const final override { return true; }
virtual Object * _offset_destination(Object * src) const final override;
virtual Object * _destination() final override;

11
xo-alloc/include/xo/alloc/Object.hpp
View file

@ -5,7 +5,7 @@
#pragma once
#include "xo/reflect/SelfTagging.hpp"
#include "xo/reflect/TaggedPtr.hpp"
#include "IAlloc.hpp"
#include <concepts>
#include <cstdint>
@ -79,6 +79,9 @@ namespace xo {
* but cost would be an extra layer of indirection
**/
class Object {
public:
using TaggedPtr = xo::reflect::TaggedPtr;
public:
virtual ~Object() = default;
@ -148,6 +151,12 @@ namespace xo {
**/
static Object * _shallow_move(Object * src, gc::GC * gc);
// Reflection support
/** tagged pointer with runtime type information
**/
virtual TaggedPtr self_tp() const = 0;
// GC support
/** true iff this object represents a forwarding pointer.

10
xo-alloc/src/alloc/Forwarding1.cpp
View file

@ -4,15 +4,25 @@
*/
#include "Forwarding1.hpp"
#include "xo/reflect/Reflect.hpp"
#include <cstddef>
#include <cassert>
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TaggedPtr;
namespace obj {
Forwarding1::Forwarding1(gp<Object> dest)
: dest_{dest}
{}
TaggedPtr
Forwarding1::self_tp() const
{
return Reflect::make_tp(const_cast<Forwarding1*>(this));
}
Object *
Forwarding1::_offset_destination(Object * src) const
{

7
xo-object/include/xo/object/Boolean.hpp
View file

@ -21,9 +21,10 @@ namespace xo {
// inherited from Object..
virtual std::size_t _shallow_size() const override;
virtual Object * _shallow_copy() const override;
virtual std::size_t _forward_children() override;
virtual TaggedPtr self_tp() const final override;
virtual std::size_t _shallow_size() const final override;
virtual Object * _shallow_copy() const final override;
virtual std::size_t _forward_children() final override;
private:
explicit Boolean(bool x) : value_{x} {}

7
xo-object/include/xo/object/Integer.hpp
View file

@ -23,9 +23,10 @@ namespace xo {
int_type value() const { return value_; }
// inherited from Object..
virtual std::size_t _shallow_size() const override;
virtual Object * _shallow_copy() const override;
virtual std::size_t _forward_children() override;
virtual TaggedPtr self_tp() const final override;
virtual std::size_t _shallow_size() const final override;
virtual Object * _shallow_copy() const final override;
virtual std::size_t _forward_children() final override;
private:
int_type value_ = 0;

7
xo-object/include/xo/object/List.hpp
View file

@ -53,9 +53,10 @@ namespace xo {
// inherited from Object..
virtual std::size_t _shallow_size() const override;
virtual Object * _shallow_copy() const override;
virtual std::size_t _forward_children() override;
virtual TaggedPtr self_tp() const final override;
virtual std::size_t _shallow_size() const final override;
virtual Object * _shallow_copy() const final override;
virtual std::size_t _forward_children() final override;
private:
List(gp<Object> head, gp<List> rest);

8
xo-object/include/xo/object/String.hpp
View file

@ -31,10 +31,10 @@ namespace xo {
std::size_t length() const;
// inherited from Object..
virtual std::size_t _shallow_size() const override;
virtual Object * _shallow_copy() const override;
virtual std::size_t _forward_children() override;
virtual TaggedPtr self_tp() const final override;
virtual std::size_t _shallow_size() const final override;
virtual Object * _shallow_copy() const final override;
virtual std::size_t _forward_children() final override;
private:
String(owner owner, std::size_t z, char * s);

11
xo-object/src/object/Boolean.cpp
View file

@ -4,11 +4,16 @@
*/
#include "Boolean.hpp"
#include "TaggedPtr.hpp"
#include "xo/reflect/Reflect.hpp"
#include <array>
#include <cassert>
#include <cstddef>
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TaggedPtr;
namespace obj {
gp<Boolean>
Boolean::boolean_obj(bool x)
@ -31,6 +36,12 @@ namespace xo {
return boolean_obj(false);
}
TaggedPtr
Boolean::self_tp() const
{
return Reflect::make_tp(const_cast<Boolean*>(this));
}
std::size_t
Boolean::_shallow_size() const
{

9
xo-object/src/object/Integer.cpp
View file

@ -4,9 +4,13 @@
*/
#include "Integer.hpp"
#include "xo/reflect/Reflect.hpp"
#include <cstddef>
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TaggedPtr;
namespace obj {
Integer::Integer(int_type x) : value_{x} {}
@ -20,6 +24,11 @@ namespace xo {
return dynamic_cast<Integer*>(x.ptr());
}
TaggedPtr
Integer::self_tp() const {
return Reflect::make_tp(const_cast<Integer*>(this));
}
std::size_t
Integer::_shallow_size() const {
return sizeof(Integer);

9
xo-object/src/object/List.cpp
View file

@ -4,11 +4,15 @@
**/
#include "List.hpp"
#include "xo/reflect/Reflect.hpp"
#include "xo/indentlog/scope.hpp"
#include <cassert>
#include <cstddef>
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TaggedPtr;
namespace obj {
List::List(gp<Object> head, gp<List> rest)
: head_{head}, rest_{rest} {}
@ -66,6 +70,11 @@ namespace xo {
Object::assign_member(this, &(this->rest_), tail);
}
TaggedPtr
List::self_tp() const {
return Reflect::make_tp(const_cast<List*>(this));
}
std::size_t
List::_shallow_size() const {
return sizeof(List);

10
xo-object/src/object/String.cpp
View file

@ -5,12 +5,17 @@
#include "String.hpp"
#include "GC.hpp"
#include "TaggedPtr.hpp"
#include "xo/reflect/Reflect.hpp"
#include <bsd/string.h>
#include <cstddef>
#include <cstring>
#include <cassert>
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TaggedPtr;
namespace obj {
String::String(owner owner, std::size_t z, char * s)
: owner_{owner}, z_chars_{z}, chars_{s}
@ -86,6 +91,11 @@ namespace xo {
return ::strlen(chars_);
}
TaggedPtr
String::self_tp() const {
return Reflect::make_tp(const_cast<String*>(this));
}
// ----- GC support -----
std::size_t