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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/datastore/array_store_config.h>
#include <vespa/vespalib/datastore/buffer_type.h>
#include <vespa/vespalib/util/array.h>
#include <memory>
namespace vespalib::alloc { class MemoryAllocator; }
namespace search::tensor {
class TensorBufferOperations;
class TensorBufferTypeMapper;
/*
* Class representing buffer type for tensors with a large number of
* subspaces in array store. Tensor buffers are externally allocated
* (cf. vespalib::Array).
*/
class LargeSubspacesBufferType : public vespalib::datastore::BufferType<vespalib::Array<char>>
{
using AllocSpec = vespalib::datastore::ArrayStoreConfig::AllocSpec;
using ArrayType = vespalib::Array<char>;
using ParentType = vespalib::datastore::BufferType<ArrayType>;
using CleanContext = typename ParentType::CleanContext;
std::shared_ptr<vespalib::alloc::MemoryAllocator> _memory_allocator;
TensorBufferOperations& _ops;
public:
LargeSubspacesBufferType(const AllocSpec& spec, std::shared_ptr<vespalib::alloc::MemoryAllocator> memory_allocator, TensorBufferTypeMapper& type_mapper) noexcept;
~LargeSubspacesBufferType() override;
void clean_hold(void* buffer, size_t offset, EntryCount num_entries, CleanContext cleanCtx) override;
void destroy_entries(void *buffer, EntryCount num_entries) override;
void fallback_copy(void *newBuffer, const void *oldBuffer, EntryCount num_entries) override;
void initialize_reserved_entries(void *buffer, EntryCount reserved_entries) override;
const vespalib::alloc::MemoryAllocator* get_memory_allocator() const override;
vespalib::alloc::Alloc initial_alloc() const noexcept {
return _memory_allocator ? vespalib::alloc::Alloc::alloc_with_allocator(_memory_allocator.get()) : vespalib::alloc::Alloc::alloc(0, vespalib::alloc::MemoryAllocator::HUGEPAGE_SIZE);
}
};
}
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