Add scan c.parallel API

c/parallel/include/cccl/c/scan.h

@@ -0,0 +1,57 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of CUDA Experimental in CUDA Core Compute Libraries,
+// under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+// SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES.
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+
+#ifndef CCCL_C_EXPERIMENTAL
+#  error "C exposure is experimental and subject to change. Define CCCL_C_EXPERIMENTAL to acknowledge this notice."
+#endif // !CCCL_C_EXPERIMENTAL
+
+#include <cuda.h>
+
+#include <cccl/c/types.h>
+
+struct cccl_device_scan_build_result_t
+{
+  int cc;
+  void* cubin;
+  size_t cubin_size;
+  CUlibrary library;
+  cccl_type_info accumulator_type;
+  CUkernel init_kernel;
+  CUkernel scan_kernel;
+  void* tile_state;
+};
+
+extern "C" CCCL_C_API CUresult cccl_device_scan_build(
+  cccl_device_scan_build_result_t* build,
+  cccl_iterator_t d_in,
+  cccl_iterator_t d_out,
+  cccl_op_t op,
+  cccl_value_t init,
+  int cc_major,
+  int cc_minor,
+  const char* cub_path,
+  const char* thrust_path,
+  const char* libcudacxx_path,
+  const char* ctk_path) noexcept;
+
+extern "C" CCCL_C_API CUresult cccl_device_scan(
+  cccl_device_scan_build_result_t build,
+  void* d_temp_storage,
+  size_t* temp_storage_bytes,
+  cccl_iterator_t d_in,
+  cccl_iterator_t d_out,
+  unsigned long long num_items,
+  cccl_op_t op,
+  cccl_value_t init,
+  CUstream stream) noexcept;
+
+extern "C" CCCL_C_API CUresult cccl_device_scan_cleanup(cccl_device_scan_build_result_t* bld_ptr) noexcept;