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xo-facet: typeseq strongly typed

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This commit is contained in:
Roland Conybeare 2026-01-02 09:52:16 -05:00
commit 3af1cf1bda
12 changed files with 38 additions and 24 deletions
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4
include/xo/alloc2/alloc/AAllocIterator.hpp
View file

@ -7,6 +7,7 @@
#include "AllocInfo.hpp"
#include "cmpresult.hpp"
#include "typeseq.hpp"
#include <xo/facet/obj.hpp>
namespace xo {
@ -22,11 +23,12 @@ namespace xo {
**/
struct AAllocIterator {
using obj_AAllocIterator = xo::facet::obj<AAllocIterator>;
using typeseq = xo::facet::typeseq;
/** @defgroup mm-allociterator-methods AllocIterator methods **/
///@{
/** RTTI: unique id# for actual runtime *data* representation **/
virtual int32_t _typeseq() const noexcept = 0;
virtual typeseq _typeseq() const noexcept = 0;
/** retrieve AllocInfo for current iterator position
**/
virtual AllocInfo deref(Copaque d) const noexcept = 0;

5
include/xo/alloc2/alloc/AAllocator.hpp
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@ -9,6 +9,7 @@
#include "AllocInfo.hpp"
//#include "AllocIterator.hpp"
#include "AllocRange.hpp"
#include "typeseq.hpp"
#include <xo/facet/obj.hpp>
#include <xo/facet/facet_implementation.hpp>
#include <xo/facet/typeseq.hpp>
@ -40,6 +41,8 @@ namespace xo {
using header_type = std::uint64_t;
/** iterator range. These are forward iterators over allocs **/
using range_type = AllocRange;
/** sequence number identifying a datatype **/
using typeseq = xo::facet::typeseq;
///@}
/*
@ -58,7 +61,7 @@ namespace xo {
///@{
/** RTTI: unique id# for actual runtime data representation **/
virtual int32_t _typeseq() const noexcept = 0;
virtual typeseq _typeseq() const noexcept = 0;
/** optional name for allocator @p d .
* Allows labeling allocators, for diagnostics/instrumentation.
**/

10
include/xo/alloc2/alloc/IAllocIterator_Any.hpp
View file

@ -1,4 +1,4 @@
/** @file IAllocIter_Any.hpp
/** @file IAllocIterator_Any.hpp
*
* @author Roland Conybeare, Dec 2025
**/
@ -20,10 +20,12 @@ namespace xo {
* @brief AllocIterator implementation for empty variant instance
**/
struct IAllocIterator_Any : public AAllocIterator {
using typeseq = xo::facet::typeseq;
const AAllocIterator * iface() const { return std::launder(this); }
// from AAllocIterator
int32_t _typeseq() const noexcept override { return s_typeseq; }
typeseq _typeseq() const noexcept override { return s_typeseq; }
// const methods
[[noreturn]] AllocInfo deref(Copaque) const noexcept override { _fatal(); }
@ -37,10 +39,10 @@ namespace xo {
[[noreturn]] static void _fatal();
public:
static int32_t s_typeseq;
static typeseq s_typeseq;
static bool _valid;
};
} /*namespace mm*/
} /*namespace xo*/
/* end IAllocIter_Any.hpp */
/* end IAllocIterator_Any.hpp */

7
include/xo/alloc2/alloc/IAllocIterator_Xfer.hpp
View file

@ -18,6 +18,7 @@ namespace xo {
typename IAllocIterator_DRepr>
struct IAllocIterator_Xfer : public AAllocIterator {
using Impl = IAllocIterator_DRepr;
using typeseq = xo::facet::typeseq;
static const DRepr & _dcast(Copaque d) { return *(const DRepr *)d; }
static DRepr & _dcast(Opaque d) { return *(DRepr *)d; }
@ -26,7 +27,7 @@ namespace xo {
// const methods
int32_t _typeseq() const noexcept override { return s_typeseq; }
typeseq _typeseq() const noexcept override { return s_typeseq; }
AllocInfo deref(Copaque d)
const noexcept override { return I::deref(_dcast(d)); }
cmpresult compare(Copaque d,
@ -42,12 +43,12 @@ namespace xo {
using I = Impl;
public:
static int32_t s_typeseq;
static typeseq s_typeseq;
static bool _valid;
};
template <typename DRepr, typename IAllocIterator_DRepr>
int32_t
xo::facet::typeseq
IAllocIterator_Xfer<DRepr, IAllocIterator_DRepr>::s_typeseq
= facet::typeseq::id<DRepr>();

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

@ -7,6 +7,7 @@
#include "AAllocator.hpp"
#include "AllocIterator.hpp"
#include "typeseq.hpp"
#include <xo/facet/obj.hpp>
namespace xo {
@ -30,7 +31,7 @@ namespace xo {
const AAllocator * iface() const { return std::launder(this); }
// from AAllocator
int32_t _typeseq() const noexcept override { return s_typeseq; }
typeseq _typeseq() const noexcept override { return s_typeseq; }
// const methods
[[noreturn]] std::string_view name(Copaque) const noexcept override { _fatal(); }
@ -58,7 +59,7 @@ namespace xo {
[[noreturn]] static void _fatal();
public:
static int32_t s_typeseq;
static typeseq s_typeseq;
static bool _valid;
};
}

7
include/xo/alloc2/alloc/IAllocator_Xfer.hpp
View file

@ -25,6 +25,7 @@ namespace xo {
using Impl = IAllocator_DRepr;
using size_type = AAllocator::size_type;
using value_type = AAllocator::value_type;
using typeseq = AAllocator::typeseq;
///@}
/** @defgroup mm-allocator-xfer-methods IAllocator_Xfer methods **/
@ -38,7 +39,7 @@ namespace xo {
// const methods
/** return typeseq for @tparam DRepr **/
int32_t _typeseq() const noexcept override { return s_typeseq; }
typeseq _typeseq() const noexcept override { return s_typeseq; }
std::string_view name(Copaque d) const noexcept override { return I::name(_dcast(d)); }
size_type reserved(Copaque d) const noexcept override { return I::reserved(_dcast(d)); }
size_type size(Copaque d) const noexcept override { return I::size(_dcast(d)); }
@ -75,12 +76,12 @@ namespace xo {
using I = Impl;
public:
static int32_t s_typeseq;
static xo::facet::typeseq s_typeseq;
static bool _valid;
};
template <typename DRepr, typename IAllocator_DRepr>
int32_t
xo::facet::typeseq
IAllocator_Xfer<DRepr, IAllocator_DRepr>::s_typeseq = facet::typeseq::id<DRepr>();
template <typename DRepr, typename IAllocator_DRepr>

3
include/xo/alloc2/alloc/RAllocIterator.hpp
View file

@ -17,11 +17,12 @@ namespace xo {
public:
using ObjectType = Object;
using DataPtr = Object::DataPtr;
using typeseq = xo::facet::typeseq;
RAllocIterator() {}
RAllocIterator(Object::DataPtr data) : Object{std::move(data)} {}
int32_t _typeseq() const noexcept { return O::iface()->_typeseq(); }
typeseq _typeseq() const noexcept { return O::iface()->_typeseq(); }
AllocInfo deref() const noexcept { return O::iface()->deref(O::data()); }
cmpresult compare(const obj<AAllocIterator> & other) const noexcept {
return O::iface()->compare(O::data(), other); }

3
include/xo/alloc2/alloc/RAllocator.hpp
View file

@ -20,6 +20,7 @@ namespace xo {
public:
using ObjectType = Object;
using DataPtr = Object::DataPtr;
using typeseq = xo::facet::typeseq;
using size_type = std::size_t;
using value_type = std::byte *;
using range_type = AAllocator::range_type;
@ -27,7 +28,7 @@ namespace xo {
RAllocator() {}
RAllocator(Object::DataPtr data) : Object{std::move(data)} {}
int32_t _typeseq() const noexcept { return O::iface()->_typeseq(); }
typeseq _typeseq() const noexcept { return O::iface()->_typeseq(); }
std::string_view name() const noexcept { return O::iface()->name(O::data()); }
size_type reserved() const noexcept { return O::iface()->reserved(O::data()); }
size_type size() const noexcept { return O::iface()->size(O::data()); }

2
include/xo/alloc2/arena/ArenaConfig.hpp
View file

@ -24,7 +24,7 @@ namespace xo {
/** optional name, for diagnostics **/
std::string name_;
/** desired arena size -- hard max = reserved virtual memory **/
std::size_t size_;
std::size_t size_ = 0;
/** hugepage size -- using huge pages relieves some TLB pressure
* (provided you use their full extent :)
**/

12
src/alloc2/DArena.cpp
View file

@ -46,14 +46,13 @@ namespace xo {
// end of hugeppage-aligned range starting at aligned_base
byte * aligned_hi = aligned_base + target_z;
#ifdef NOT_YET
log && log("acquired memory [lo,hi) using mmap",
xtag("lo", base),
xtag("aligned_lo", aligned_base),
xtag("req_z", req_z),
xtag("target_z", target_z),
xtag("hi", (byte *)(base) + z));
#endif
xtag("aligned_hi", aligned_hi),
xtag("hi", hi));
// 3. assess mmap success
{
@ -109,7 +108,7 @@ namespace xo {
DArena
DArena::map(const ArenaConfig & cfg)
{
//scope log(XO_DEBUG(debug_flag), xtag("name", name));
scope log(XO_DEBUG(true));
/* vm page size. 4KB, probably */
size_t page_z = getpagesize();
@ -122,6 +121,9 @@ namespace xo {
*/
size_t align_z = (enable_hugepage_flag ? cfg.hugepage_z_ : page_z);
log && log(xtag("page_z", page_z),
xtag("align_z", align_z));
auto [lo, hi] = map_aligned_range(cfg.size_,
align_z,
enable_hugepage_flag);

2
src/alloc2/IAllocIterator_Any.cpp
View file

@ -26,7 +26,7 @@ namespace xo {
std::terminate();
}
int32_t
typeseq
IAllocIterator_Any::s_typeseq = typeseq::id<DVariantPlaceholder>();
bool

2
src/alloc2/IAllocator_Any.cpp
View file

@ -27,7 +27,7 @@ namespace xo {
std::terminate();
}
int32_t
typeseq
IAllocator_Any::s_typeseq = typeseq::id<DVariantPlaceholder>();
bool