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#pragma clang system_header
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#pragma once
#include "contrib/libs/apache/arrow_next/cpp/src/arrow/c/helpers.h"
namespace arrow20 {
namespace internal {
struct SchemaExportTraits {
typedef struct ArrowSchema CType;
static constexpr auto IsReleasedFunc = &ArrowSchemaIsReleased;
static constexpr auto ReleaseFunc = &ArrowSchemaRelease;
};
struct ArrayExportTraits {
typedef struct ArrowArray CType;
static constexpr auto IsReleasedFunc = &ArrowArrayIsReleased;
static constexpr auto ReleaseFunc = &ArrowArrayRelease;
static constexpr auto MoveFunc = &ArrowArrayMove;
static constexpr auto MarkReleased = &ArrowArrayMarkReleased;
};
struct ArrayDeviceExportTraits {
typedef struct ArrowDeviceArray CType;
static constexpr auto IsReleasedFunc = &ArrowDeviceArrayIsReleased;
static constexpr auto ReleaseFunc = &ArrowDeviceArrayRelease;
static constexpr auto MoveFunc = &ArrowDeviceArrayMove;
static constexpr auto MarkReleased = &ArrowDeviceArrayMarkReleased;
};
struct ArrayStreamExportTraits {
typedef struct ArrowArrayStream CType;
static constexpr auto IsReleasedFunc = &ArrowArrayStreamIsReleased;
static constexpr auto ReleaseFunc = &ArrowArrayStreamRelease;
static constexpr auto MoveFunc = &ArrowArrayStreamMove;
static constexpr auto MarkReleased = &ArrowArrayStreamMarkReleased;
};
struct ArrayDeviceStreamExportTraits {
typedef struct ArrowDeviceArrayStream CType;
static constexpr auto IsReleasedFunc = &ArrowDeviceArrayStreamIsReleased;
static constexpr auto ReleaseFunc = &ArrowDeviceArrayStreamRelease;
static constexpr auto MoveFunc = &ArrowDeviceArrayStreamMove;
static constexpr auto MarkReleased = &ArrowDeviceArrayStreamMarkReleased;
};
// A RAII-style object to release a C Array / Schema struct at block scope exit.
template <typename Traits>
class ExportGuard {
public:
using CType = typename Traits::CType;
explicit ExportGuard(CType* c_export) : c_export_(c_export) {}
ExportGuard(ExportGuard&& other) : c_export_(other.c_export_) {
other.c_export_ = nullptr;
}
ExportGuard& operator=(ExportGuard&& other) {
Release();
c_export_ = other.c_export_;
other.c_export_ = nullptr;
}
~ExportGuard() { Release(); }
void Detach() { c_export_ = nullptr; }
void Reset(CType* c_export) { c_export_ = c_export; }
void Release() {
if (c_export_) {
Traits::ReleaseFunc(c_export_);
c_export_ = nullptr;
}
}
private:
ARROW_DISALLOW_COPY_AND_ASSIGN(ExportGuard);
CType* c_export_;
};
using SchemaExportGuard = ExportGuard<SchemaExportTraits>;
using ArrayExportGuard = ExportGuard<ArrayExportTraits>;
using DeviceArrayExportGuard = ExportGuard<ArrayDeviceExportTraits>;
using ArrayStreamExportGuard = ExportGuard<ArrayStreamExportTraits>;
using DeviceArrayStreamExportGuard = ExportGuard<ArrayDeviceStreamExportTraits>;
} // namespace internal
} // namespace arrow20
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