[STF] Rename places namespace from cuda::experimental::stf to cuda::experimental::places by caugonnet · Pull Request #8219 · NVIDIA/cccl

caugonnet · 2026-03-30T21:03:43Z

Move all __places/ headers from namespace cuda::experimental::stf to cuda::experimental::places. Each header imports needed stf utility types (pos4, dim4, cuda_safe_call, etc.) via using declarations and re-exports its public types back into cuda::experimental::stf for backward compat.

Hash specializations (stf::hash<data_place>, stf::hash<exec_place>, stf::hash<green_ctx_view>) remain in the stf namespace where the primary template is defined. The composite_slice cross-boundary function signature is updated to use the qualified places type.

Tests, examples, C API, and documentation are updated to use the new namespace.

Made-with: Cursor

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New or existing tests cover these changes.
The documentation is up to date with these changes.

…xperimental::places Move all __places/ headers from namespace cuda::experimental::stf to cuda::experimental::places. Each header imports needed stf utility types (pos4, dim4, cuda_safe_call, etc.) via using declarations and re-exports its public types back into cuda::experimental::stf for backward compat. Hash specializations (stf::hash<data_place>, stf::hash<exec_place>, stf::hash<green_ctx_view>) remain in the stf namespace where the primary template is defined. The composite_slice cross-boundary function signature is updated to use the qualified places type. Tests, examples, C API, and documentation are updated to use the new namespace. Made-with: Cursor

copy-pr-bot · 2026-03-30T21:03:46Z

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cudax/include/cuda/experimental/__places/exec/cuda_stream.cuh

cudax/include/cuda/experimental/__places/exec/green_context.cuh

Move all stf namespace backward compatibility using-declarations from individual __places/ headers into the central places.cuh compat block. This makes places.cuh the single curated list of places types re-exported into the stf namespace. Made-with: Cursor

cudax/include/cuda/experimental/__places/places.cuh

caugonnet · 2026-03-30T21:31:53Z

cudax/include/cuda/experimental/__places/places.cuh

+};
+#endif // _CCCL_CTK_AT_LEAST(12, 4)
+
+// Backward compatibility: re-export places types into the stf namespace


We need to have a curated list ... and i hate this for now

caugonnet · 2026-03-30T21:32:50Z

docs/cudax/places.rst

+The places API is part of the ``cuda::experimental::places`` C++ namespace
 and can be used standalone via the ``cuda/experimental/places.cuh`` header,
-without pulling in the full CUDASTF task-graph framework.
+without pulling in the full CUDASTF task-graph framework. For backward


Be more specific about what exactly is made available

cudax/include/cuda/experimental/__places/places.cuh

Remove non-user-visible types from the places.cuh backward compat block and qualify them with places:: in the __stf/ files that use them. Move instance_id_t to its own __stf/internal/instance_id.cuh header since it conceptually belongs to the task framework, not the places library. The compat block now only re-exports user-facing types: data_place, exec_place, exec_place_scope, decorated_stream, make_grid, partition_cyclic, partition_tile, to_index, from_index, device_ordinal. Made-with: Cursor

Made-with: Cursor

cudax/include/cuda/experimental/__stf/localization/composite_slice.cuh

Remove redundant using places::decorated_stream from stream_ctx.cuh and remove place_partition backward compat block from place_partition.cuh since loop_dispatch.cuh now uses places:: qualified names directly. Made-with: Cursor

caugonnet · 2026-03-30T22:28:12Z

/ok to test 9ac579c

Forward declarations like class exec_place inside namespace stf conflict with the using places::exec_place from the compat block. Remove redundant forward declarations where places.cuh is transitively included, and for files without transitive inclusion, forward-declare in namespace places and add a local using. Made-with: Cursor

caugonnet · 2026-03-31T05:54:39Z

/ok to test a55db1e

Tests were using place_partition_scope, place_partition, place_partition_scope_to_string, and make_grid unqualified via `using namespace stf`, but these are no longer re-exported from the stf namespace. Also rename local variable `places` in gc_grid.cu to avoid shadowing the namespace. Made-with: Cursor

cudax/include/cuda/experimental/__places/places.cuh

Split partition-related usings into stf_places_partition_into_stf.cuh to avoid include cycle with async_resources_handle. Extend stf_places_extended_exports with localized_array, stream ids, hash keys, and machine.

andralex · 2026-04-02T02:32:08Z

/ok to test b3b4d1d

…APIs Fix CI after partition usings moved out of stf.cuh umbrella.

andralex · 2026-04-02T03:03:21Z

/ok to test 79b3ded

- stf_places_into_stf_core: include places.cuh for isolated header tests - stf_places_extended_exports: include hash.cuh so SortIncludes cannot break specialization order; drop redundant hash includes from callers - composite_slice: extended + into_stf_core only (sorted order safe)

andralex · 2026-04-02T05:18:17Z

/ok to test 25d6260

andralex

More to come

andralex · 2026-04-02T15:08:35Z

/ok to test 25d6260

copy-pr-bot · 2026-04-02T15:08:39Z

/ok to test 25d6260

@andralex, there was an error processing your request: E2

See the following link for more information: https://docs.gha-runners.nvidia.com/cpr/e/2/

andralex · 2026-04-02T15:30:59Z

/ok to test 88b034b

github-actions · 2026-04-02T16:30:06Z

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caugonnet self-assigned this Mar 30, 2026

caugonnet added stf Sequential Task Flow programming model places labels Mar 30, 2026

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caugonnet added 2 commits March 30, 2026 23:14

remove some redundant using

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caugonnet added 4 commits March 30, 2026 23:55

remove make_grid from places backward compat block

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Made-with: Cursor

clang-format

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comments about a TODO

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caugonnet commented Mar 30, 2026

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caugonnet and others added 3 commits March 31, 2026 08:56

clang-format

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Merge branch 'main' into stf_places_namespaces

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stf: export places names into stf; remove places:: call sites

b3b4d1d

Split partition-related usings into stf_places_partition_into_stf.cuh to avoid include cycle with async_resources_handle. Extend stf_places_extended_exports with localized_array, stream ids, hash keys, and machine.

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stf tests: include stf_places_partition_into_stf for place_partition …

79b3ded

…APIs Fix CI after partition usings moved out of stf.cuh umbrella.

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andralex marked this pull request as ready for review April 2, 2026 05:32

andralex requested review from a team as code owners April 2, 2026 05:32

andralex requested review from andralex, gonidelis and wmaxey April 2, 2026 05:32

andralex enabled auto-merge (squash) April 2, 2026 05:32

cccl-authenticator-app bot moved this from In Progress to In Review in CCCL Apr 2, 2026

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Merge branch 'main' into stf_places_namespaces

88b034b

miscco approved these changes Apr 2, 2026

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NaderAlAwar approved these changes Apr 2, 2026

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andralex merged commit 9832833 into NVIDIA:main Apr 2, 2026
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github-project-automation bot moved this from In Review to Done in CCCL Apr 2, 2026

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caugonnet commented Mar 30, 2026

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