v1.7.1

Refactored

• ctypes robustness sweep (a2baea9) — eight correctness and safeguard
  improvements cross-checked against the Python ctypes reference documentation:
  • ABI size asserts for all graph param structs (cudaPos==24,
    cudaPitchedPtr==32, cudaExtent==24, cudaMemcpy3DParms==160) catch
    layout drift at import time.
  • NumpyBuffers.close(): null self.buffer after free_host to prevent
    use-after-free on the CUDA-pinned host-memory alias.
  • _log_dll_path: consume ctypes.get_last_error() on GetModuleFileNameW
    failure; guard dll._handle with getattr for forward-compatibility.
  • _HighResTimer.__enter__: check timeBeginPeriod(1) return code; log on
    TIMERR_NOCANDO.
  • _winmm loader: removed unused use_last_error=True (winmm timer APIs
    return status directly, not via GetLastError).
  • Removed dead cudaGetLastError argtypes binding; cudaPeekAtLastError is
    the correct non-destructive sticky-error read.
  • probe_producer: decode cudaGetErrorString bytes → str (was embedding
    b'...' repr in error messages).
  • _load_cuda_runtime: documented winmode asymmetry between absolute-path
    and bare-name DLL-load tiers.

Tests

• tests/test_errcheck_coverage.py (a2baea9, 3 tests): drift-prevention
  guard — every c_int-restype cudart function has errcheck installed;
  cudaGetLastError asserted unbound.
• tests/test_numpybuffers_close.py (8b74ab0, 5 tests): NumpyBuffers.close()
  UAF guard — pinned path nulls buffer, pageable path preserves it, idempotency,
  and host_unregister branch.
• tests/test_probe_error_decode.py (8b74ab0, 2 tests): probe_producer
  error-string decode — verifies str in message and None guard for NULL returns.

Internal

• pyproject.toml version: 1.7.0 → 1.7.1.
• TOX artifact: TOXES/CUDAIPCLink_v1.7.1.tox to be built separately.
  v1.7.0 retained per versioned-binary tracking policy.