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xo-interpreter CVector for StackFrame reflection + OSX imgui edits

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This commit is contained in:
Roland Conybeare 2025-11-17 10:41:35 -05:00
commit d58a8532d4
11 changed files with 98 additions and 63 deletions
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73
xo-interpreter/include/xo/interpreter/StackFrame.hpp
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@ -2,10 +2,41 @@
#include "xo/alloc/IAlloc.hpp"
#include "xo/alloc/Object.hpp"
#include <cstddef>
#include <cstdint>
namespace xo {
namespace scm {
/** gc-only vector
**/
template <typename ElementType>
class CVector {
public:
using value_type = ElementType;
public:
CVector(gc::IAlloc * mm, std::size_t n)
: n_{n}, v_{nullptr}
{
if (n_ > 0) {
std::byte * mem = mm->alloc(n_ * sizeof(ElementType));
this->v_ = new (mem) ElementType[n];
}
}
std::size_t size() const { return n_; }
ElementType operator[](std::size_t i) const { return v_[i]; }
ElementType & operator[](std::size_t i) { return v_[i]; }
friend class StackFrame;
private:
/** number of elements in @ref v_ **/
std::size_t n_ = 0;
/** contiguous array of pointers **/
ElementType * v_ = nullptr;
};
/** @class StackFrame
* @brief Represent a single runtime stack frame for a Schematika function
*
@ -15,26 +46,26 @@ namespace xo {
*
* memory layout:
*
* +------------+
* | vtable |
* +------------+
* | .n_ |
* +------------+
* | .v_ +------\
* +------------+ <--/
* | .v_[0] |
* +------------+
* . .. .
* +------------+
* | .v_[.n_-1] |
* +------------+
* +-----------------------+
* | vtable |
* +------------+----------+
* | .slot_v_ | .n_ |
* | +----------+
* | | .v_ +------\
* +------------+----------+ <--/
* | .v_[0] |
* +-----------------------+
* . .. .
* +-----------------------+
* | .v_[.n_-1] |
* +-----------------------+
**/
class StackFrame : public Object {
public:
using TaggedPtr = xo::reflect::TaggedPtr;
public:
StackFrame(gc::IAlloc * mm, std::size_t n_slot);
StackFrame(gc::IAlloc * mm, std::size_t n) : slot_v_{mm, n} {}
/** create frame using allocator @p mm,
* with exactly @p n_slot object pointers
@ -44,12 +75,10 @@ namespace xo {
/** reflect StackFrame object representation **/
static void reflect_self();
std::size_t n_slot() const { return n_slot_; }
gp<Object> lookup(std::size_t i) const { return v_[i]; }
gp<Object> & lookup(std::size_t i) { return v_[i]; }
std::size_t size() const { return slot_v_.size(); }
gp<Object> operator[](std::size_t i) const { return lookup(i); }
gp<Object> & operator[](std::size_t i) { return lookup(i); }
gp<Object> operator[](std::size_t i) const { return slot_v_[i]; }
gp<Object> & operator[](std::size_t i) { return slot_v_[i]; }
// inherited from Object..
virtual TaggedPtr self_tp() const final override;
@ -59,10 +88,8 @@ namespace xo {
virtual std::size_t _forward_children() final override;
private:
/** number of elements in frame **/
std::size_t n_slot_ = 0;
/** contiguous array of object pointers: v[0] .. v[n-1] **/
gp<Object> * v_ = nullptr;
/** stack frame contents **/
CVector<gp<Object>> slot_v_;
};
} /*namespace scm*/
} /*namespace xo*/