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xo-alloc2: DX1CollectorIterator infra [WIP]

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This commit is contained in:
Roland Conybeare 2025-12-17 20:16:46 -05:00
commit bf27314688
30 changed files with 1041 additions and 176 deletions
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12
include/xo/alloc2/alloc/AAllocIterator.hpp
View file

@ -6,6 +6,7 @@
#pragma once
#include "alloc/AllocInfo.hpp"
#include "cmpresult.hpp"
#include <xo/facet/obj.hpp>
namespace xo {
@ -19,7 +20,8 @@ namespace xo {
/** @class AAllocIterator
* @brief Abstract facet for iterating over allocs
*
* Iterator refers to an AllocInfo instance.
* Iterator refers to an AllocInfo instance
* Only supporting forward-allocator.
**/
struct AAllocIterator {
using obj_AAllocIterator = xo::facet::obj<AAllocIterator>;
@ -29,13 +31,11 @@ namespace xo {
/** retrieve AllocInfo for current iterator position
**/
virtual AllocInfo deref(Copaque d) const noexcept = 0;
/** compare alloc iterators @p d and @p other for equality **/
virtual int compare(Copaque d,
const obj_AAllocIterator & other) const noexcept = 0;
/** compare alloc iterators @p d and @p other **/
virtual cmpresult compare(Copaque d,
const obj_AAllocIterator & other) const noexcept = 0;
/** advance iterator to next position **/
virtual void next(Opaque d) const noexcept = 0;
/** retreat iterator to previous position **/
virtual void prev(Opaque d) const noexcept = 0;
};
} /*namespace mm*/
} /*namespace xo*/

8
include/xo/alloc2/alloc/AllocError.hpp
View file

@ -29,6 +29,14 @@ namespace xo {
alloc_info_disabled,
/** attempt to call alloc_info for address not owned by allocator **/
alloc_info_address,
/** for example: alloc iteration not supported in arenas with
* AllocConfig.store_header_flag_ = false
**/
alloc_iterator_not_supported,
/** attempt to deref an iterator that does not refer to an alloc **/
alloc_iterator_deref,
/** attempt to advance an iterator that does not refer to an alloc **/
alloc_iterator_next,
};
struct AllocError {

14
include/xo/alloc2/alloc/AllocHeader.hpp
View file

@ -17,20 +17,6 @@ namespace xo {
explicit AllocHeader(repr_type x) : repr_{x} {}
#ifdef OBSOLETE
std::uint32_t tseq(const AllocHeaderConfig & cfg) const noexcept {
return cfg.tseq(repr_);
}
std::uint32_t age(const AllocHeaderConfig & cfg) const noexcept {
return cfg.age(repr_);
}
size_type size(const AllocHeaderConfig & cfg) const noexcept {
return cfg.size(repr_);
}
#endif
repr_type repr_;
};

8
include/xo/alloc2/alloc/AllocInfo.hpp
View file

@ -31,7 +31,11 @@ namespace xo {
p_guard_hi_{p_guard_hi} {}
/** error when alloc-header not configured **/
static AllocInfo error_not_configured(AllocHeaderConfig * p_cfg) {
static AllocInfo error_not_configured(const AllocHeaderConfig * p_cfg) {
return AllocInfo(p_cfg, nullptr, nullptr, nullptr);
}
/** error on deref empty iterator **/
static AllocInfo error_invalid_iterator(const AllocHeaderConfig * p_cfg) {
return AllocInfo(p_cfg, nullptr, nullptr, nullptr);
}
@ -46,6 +50,8 @@ namespace xo {
std::uint32_t age() const noexcept { return p_config_->age (*p_header_); }
/** Allocation size (including allocator-supplied padding) **/
size_type size() const noexcept { return p_config_->size(*p_header_); }
/** Payload for this allocation. This is the memory available to application **/
span_type payload() const noexcept;
/** Guard bytes immediately following allocation **/
span_type guard_hi() const noexcept;
/** Number of guard bytes **/

5
include/xo/alloc2/alloc/IAllocIterator_Any.hpp
View file

@ -27,12 +27,11 @@ namespace xo {
// const methods
[[noreturn]] AllocInfo deref(Copaque) const noexcept override { _fatal(); }
[[noreturn]] int compare(Copaque,
const obj_AAllocIterator &) const noexcept override { _fatal(); }
[[noreturn]] cmpresult compare(Copaque,
const obj_AAllocIterator &) const noexcept override { _fatal(); }
// non-const methods
[[noreturn]] void next(Opaque) const noexcept override { _fatal(); }
[[noreturn]] void prev(Opaque) const noexcept override { _fatal(); }
private:
[[noreturn]] static void _fatal();

9
include/xo/alloc2/alloc/IAllocIterator_Xfer.hpp
View file

@ -3,6 +3,8 @@
* @author Roland Conybeare, Dec 2025
**/
#pragma once
#include "AAllocIterator.hpp"
namespace xo {
@ -27,15 +29,14 @@ namespace xo {
int32_t _typeseq() const noexcept override { return s_typeseq; }
AllocInfo deref(Copaque d)
const noexcept override { return I::deref(_dcast(d)); }
int compare(Copaque d,
const obj_AAllocIterator & other)
cmpresult compare(Copaque d,
const obj_AAllocIterator & other)
const noexcept override
{ return I::compare(_dcast(d), other); }
// non-const methods
void next(Opaque d) const noexcept override { I::prev(_dcast(d)); }
void prev(Opaque d) const noexcept override { I::next(_dcast(d)); }
void next(Opaque d) const noexcept override { I::next(_dcast(d)); }
private:
using I = Impl;

2
include/xo/alloc2/alloc/RAllocIterator.hpp
View file

@ -4,7 +4,7 @@
**/
#include "AAllocIterator.hpp"
#include <xo/facet/RRouter.hpp"
#include <xo/facet/RRouter.hpp>
//#include <string>
namespace xo {