104 lines
2.6 KiB
C++
104 lines
2.6 KiB
C++
/** @file DArray.cpp
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*
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* @author Roland Conybeare, Jan 2026
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**/
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#include "DArray.hpp"
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#include <xo/indentlog/print/tostr.hpp>
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#include <xo/indentlog/print/tag.hpp>
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#include <cstdint>
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namespace xo {
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using xo::mm::AGCObject;
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using xo::facet::typeseq;
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namespace scm {
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DArray *
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DArray::empty(obj<AAllocator> mm,
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size_type cap)
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{
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DArray * result = nullptr;
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void * mem = mm.alloc(typeseq::id<DArray>(),
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sizeof(DArray) + cap * sizeof(obj<AGCObject>));
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result = new (mem) DArray();
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assert(result);
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result->capacity_ = cap;
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result->size_ = 0;
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return result;
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}
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obj<AGCObject>
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DArray::at(size_type ix) const
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{
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if (ix < size_) {
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return elts_[ix];
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} else {
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throw std::runtime_error(tostr("DArray::at: out-of-range index where [0..z) expected",
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xtag("index", ix),
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xtag("z", this->size())));
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return obj<AGCObject>();
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}
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}
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bool
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DArray::push_back(obj<AGCObject> elt) noexcept {
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if (size_ >= capacity_) {
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return false;
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} else {
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static_assert(!std::is_trivially_constructible_v<obj<AGCObject>>);
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void * mem = &(elts_[size_]);
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new (mem) obj<AGCObject>(elt);
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++(this->size_);
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return true;
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}
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}
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// gc hooks for IGCObject_DArray
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std::size_t
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DArray::shallow_size() const noexcept
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{
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return sizeof(DArray);
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}
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DArray *
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DArray::shallow_copy(obj<AAllocator> mm) const noexcept
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{
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DArray * copy = (DArray *)mm.alloc_copy((std::byte *)this);
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if (copy) {
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copy->capacity_ = capacity_;
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copy->size_ = size_;
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constexpr auto c_obj_z = sizeof(obj<AGCObject>);
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/* memcpy sufficient for obj<A,D> */
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::memcpy((void*)&(copy->elts_[0]), (void*)&(elts_[0]), capacity_ * c_obj_z);
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}
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return copy;
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}
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std::size_t
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DArray::forward_children(obj<ACollector> gc) noexcept
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{
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for (size_type i = 0; i < size_; ++i) {
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obj<AGCObject> & elt = elts_[i];
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gc.forward_inplace(elt.iface(), (void **)&(elt.data_));
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}
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return shallow_size();
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}
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} /*namespace scm*/
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} /*namespace xo*/
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