sco_storage_v1.column_count

Catalogue snapshot — development preview

SDK 2.3.0 · game pack 0.6.0 · source e616ed69d8f9f77b0f4827881c86d91e4a7d1689 Published release: sdk-v2.3.0 (immutable approved assets; this development preview is not an approved release). Source-backed inventory is not a runtime or in-game verification claim.

Returns number of columns of a held cursor into required uint32_t out_count; no current row needed; output initialized to 0.

Limitations / unestablished guarantees

• Same-call recursive reentrancy unspecified.

Signature

sco_result (*)(sco_plugin *, uint64_t, uint32_t *)

Service and availability

Service index

Property	Value
Symbol	sco_storage_v1.column_count
Record ID	sco-storage-v1-column-count
Service	sco.storage
Table	sco_storage_v1
Version macro	SCO_STORAGE_VERSION_1_0
Packed table version	65536
Since / availability	size >= 96; 1.0
Complete member extent (x64 bytes)	96
Table size (x64 bytes)	128

Header source

Parameters and buffers

sco_result (*column_count)(sco_plugin* self, uint64_t cursor, uint32_t* out_count);
Returns number of columns of a held cursor into required uint32_t out_count; no current row needed; output initialized to 0.

Results and failures

Common storage failures; BAD_ARG NULL output; NOT_FOUND unknown/non-owned cursor; *out_count initialized to 0.

Absent capability

unspecified

Ownership

Caller buffers; inputs/SQL parameters copied during call. Host owns database/cursors; no SQLite pointer or allocation crosses the ABI.

Thread affinity

Any thread; calls serialize per plugin. Same-call recursive reentrancy unspecified.

Callback context

unspecified

Reentrancy

unspecified

Cleanup and cancellation

No cancellation entrypoint; ordinary unload/non-retained crash cleanup rolls back transaction and closes cursors/database. Retained-provider faults skip owner resource-release hooks and require restart; backing resources remain retained, not safe for cached calls.

Language mappings

Status labels are copied verbatim from the catalogue: direct is native access; typed-wrapper is wrapper-backed; restricted is a subset/adaptation; unsupported means no supported route is established. No status implies universal safety.

Language	Catalogue status	Source evidence / wrapper tokens
c	direct	include/sco_storage.h (*column_count)
cpp	typed-wrapper	include/scosdk/storage.hpp if (detail::CanCall(t_, &sco_storage_v1::column_count)) t_->column_count(self_, id_, &n);
csharp	typed-wrapper	sdk/csharp/Sco.Sdk/Storage.cs return _id != 0 && _s.Table != null && _s.Table->size >= (uint)((byte*)&_s.Table->column_count - (byte*)_s.Table + sizeof(nint)) && _s.Table->column_count != null && _s.Table->column_count(_s.SelfFor, _id, &n) == ScoResult.Ok ? (int)n : 0;
lua	restricted	plugins/lua/sco_lua.c r = st->column_count(s->self, c->id, &ncols); sdk/docs/lua.md Cursors are the runtime’s: sql closes its cursor on every path

Examples

• sdk/examples/notebook/main.lua

Tests

• tests/abi_storage.c
• tests/test_lua.cpp
• tests/test_settings.cpp
• tests/test_storage.cpp
• sdk/csharp/Sco.Sdk.Tests/FakeHost.cs
• tools/test.sh
• sdk/csharp/Sco.Sdk.Tests/Layout.cs

ABI pins prove layout, not semantic behavior or a live game session.