44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
/** @file AllocInfo.hpp
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*
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* @author Roland Conybeare, Dec 2025
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**/
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#pragma once
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#include "AllocHeader.hpp"
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namespace xo {
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namespace mm {
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/** @class AllocInfo
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* @brief bookkeeping information for an allocation
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*
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* AllocInfo instances are 1:1 with sum of calls to
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* {@ref AAllocator::alloc, @ref AAllocator::alloc_super}
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*
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**/
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struct AllocInfo {
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using size_type = AllocHeader::size_type;
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AllocInfo(const AllocHeaderConfig * p_cfg, const AllocHeader * p_hdr)
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: p_config_{p_cfg}, p_header_{p_hdr} {}
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/** error when alloc-header not configured **/
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static AllocInfo error_not_configured(AllocHeaderConfig * p_cfg) { return AllocInfo(p_cfg, nullptr); }
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/** true for non-sentinel AllocInfo instance **/
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bool is_valid() const { return (p_config_ != nullptr) && (p_header_ != nullptr); }
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/** Type sequence number in garbage collector **/
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std::uint32_t tseq() const noexcept { return p_config_->tseq(*p_header_); }
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/** Allocation age in garbage collector **/
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std::uint32_t age() const noexcept { return p_config_->age (*p_header_); }
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/** Allocation size (including allocator-supplied padding) **/
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size_type size() const noexcept { return p_config_->size(*p_header_); }
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const AllocHeaderConfig * p_config_ = nullptr;
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const AllocHeader * p_header_ = nullptr;
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};
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} /*namespace mm*/
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} /*namespace xo*/
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/* end AllocInfo.hpp */
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