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xo-expression2 stack: expand MemorySizeInfo w/ per-type detail

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This commit is contained in:
Roland Conybeare 2026-02-16 00:48:00 -05:00
commit aa946bdc30
3 changed files with 54 additions and 4 deletions
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21
include/xo/arena/MemorySizeInfo.hpp
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@ -5,6 +5,7 @@
#pragma once
#include <xo/reflectutil/typeseq.hpp>
#include <functional>
#include <string_view>
#include <cstddef>
@ -12,14 +13,27 @@
namespace xo {
namespace mm {
struct MemorySizeDetail {
using typeseq = xo::reflect::typeseq;
/** identifies a c++ type T. See xo/facet/TypeRegistry **/
typeseq tseq_;
/** number of T-instances **/
uint32_t n_alloc_ = 0;
/** bytes used by T-instances **/
uint32_t z_alloc_ = 0;
};
struct MemorySizeInfo {
using size_type = std::size_t;
using DetailArrayType = std::array<MemorySizeDetail, 32>;
MemorySizeInfo() = default;
MemorySizeInfo(std::string_view name,
std::size_t u, std::size_t a, std::size_t c, std::size_t r)
std::size_t u, std::size_t a, std::size_t c, std::size_t r,
DetailArrayType * detail)
: resource_name_{name},
used_{u}, allocated_{a}, committed_{c}, reserved_{r}
used_{u}, allocated_{a}, committed_{c}, reserved_{r}, detail_{detail}
{}
static MemorySizeInfo sentinel() { return MemorySizeInfo(); }
@ -36,6 +50,9 @@ namespace xo {
* virtual memory addresses range obtained, whether or not committed
**/
std::size_t reserved_ = 0;
/** optional histogram with per-data-type counts **/
DetailArrayType * detail_ = nullptr;
};
/** function that visits MemorySizeInfo for a collection of @p n memory pools.