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77 lines (65 loc) · 2.13 KB
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// 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.
#include "arrow/util/buffer.h"
#include <cstdint>
#include "arrow/util/memory-pool.h"
#include "arrow/util/status.h"
namespace arrow {
Buffer::Buffer(const std::shared_ptr<Buffer>& parent, int64_t offset,
int64_t size) {
data_ = parent->data() + offset;
size_ = size;
parent_ = parent;
}
Buffer::~Buffer() {}
std::shared_ptr<Buffer> MutableBuffer::GetImmutableView() {
return std::make_shared<Buffer>(this->get_shared_ptr(), 0, size());
}
PoolBuffer::PoolBuffer(MemoryPool* pool) :
ResizableBuffer(nullptr, 0) {
if (pool == nullptr) {
pool = GetDefaultMemoryPool();
}
pool_ = pool;
}
PoolBuffer::~PoolBuffer() {
if (mutable_data_ != nullptr) {
pool_->Free(mutable_data_, capacity_);
}
}
Status PoolBuffer::Reserve(int64_t new_capacity) {
if (!mutable_data_ || new_capacity > capacity_) {
uint8_t* new_data;
if (mutable_data_) {
RETURN_NOT_OK(pool_->Allocate(new_capacity, &new_data));
memcpy(new_data, mutable_data_, size_);
pool_->Free(mutable_data_, capacity_);
} else {
RETURN_NOT_OK(pool_->Allocate(new_capacity, &new_data));
}
mutable_data_ = new_data;
data_ = mutable_data_;
capacity_ = new_capacity;
}
return Status::OK();
}
Status PoolBuffer::Resize(int64_t new_size) {
RETURN_NOT_OK(Reserve(new_size));
size_ = new_size;
return Status::OK();
}
} // namespace arrow