[DLPack][TVM FFI] Rename C exchange API to __dlpack_c_exchange_api__

[SigureMo]

PR Category

Execute Infrastructure

PR Types

New features

Description

• DLPack discussion [RFC] DLPack C Exchange API Attribute to PyCapsule dmlc/dlpack#179
• DLPack implementation Update exchange API to be capsule following new convention dmlc/dlpack#180
• TVM FFI implementation [DLPack] Further compatibility apache/tvm-ffi#315
• PyTorch implementation [DLPack] Change C Exchange API to __dlpack_c_exchange_api__ PyCapsule pytorch/pytorch#169724

For better compatibility, we expose APIs as below:

• Tensor.__c_dlpack_exchange_api__: int | types.CapsuleType
  • When tvm ffi is available and its version in {(0.1.0), (0.1.1), (0.1.2), (0.1.3)}, returns int
  • Otherwise, returns types.CapsuleType
• Tensor.__dlpack_c_exchange_api__: types.CapsuleType

TODOs

• Bump DLPack to v1.3 after Update exchange API to be capsule following new convention dmlc/dlpack#180 merged

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[Copilot]

Pull request overview

This PR renames the C DLPack exchange API from __c_dlpack_exchange_api__ to __dlpack_c_exchange_api__ to align with the TVM FFI 0.1.5 standard naming convention. The old name is maintained for backward compatibility with TVM FFI versions 0.1.0-0.1.4.

• Adds new standardized __dlpack_c_exchange_api__ attribute that always returns a PyCapsule
• Updates TVM FFI dependency from version 0.1.4 to 0.1.5
• Maintains backward compatibility by keeping __c_dlpack_exchange_api__ with conditional logic for older TVM FFI versions

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
test/dygraph_to_static/test_tensor_attr_consistency.py	Adds __dlpack_c_exchange_api__ to the allowed tensor attributes list for consistency checks
python/unittest_py/requirements.txt	Updates apache-tvm-ffi dependency from 0.1.4 to 0.1.5
python/paddle/base/dygraph/tensor_patch_methods.py	Implements new __dlpack_c_exchange_api__ attribute and adds clarifying comments about version compatibility

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