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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 "allocator.h"
#include "bufferstate.h"
#include <cassert>
namespace vespalib::datastore {
template <typename EntryT, typename RefT>
Allocator<EntryT, RefT>::Allocator(DataStoreBase &store, uint32_t typeId)
: _store(store),
_typeId(typeId)
{
}
template <typename EntryT, typename RefT>
template <typename ... Args>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::alloc(Args && ... args)
{
_store.ensure_buffer_capacity(_typeId, 1);
uint32_t buffer_id = _store.primary_buffer_id(_typeId);
BufferState &state = _store.getBufferState(buffer_id);
assert(state.isActive());
size_t oldBufferSize = state.size();
RefT ref(oldBufferSize, buffer_id);
EntryT *entry = _store.getEntry<EntryT>(ref);
new (static_cast<void *>(entry)) EntryT(std::forward<Args>(args)...);
state.stats().pushed_back(1);
return HandleType(ref, entry);
}
template <typename EntryT, typename RefT>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::allocArray(ConstArrayRef array)
{
_store.ensure_buffer_capacity(_typeId, 1);
uint32_t buffer_id = _store.primary_buffer_id(_typeId);
BufferState &state = _store.getBufferState(buffer_id);
assert(state.isActive());
assert(state.getArraySize() == array.size());
RefT ref(state.size(), buffer_id);
EntryT *buf = _store.template getEntryArray<EntryT>(ref, array.size());
for (size_t i = 0; i < array.size(); ++i) {
new (static_cast<void *>(buf + i)) EntryT(array[i]);
}
state.stats().pushed_back(1);
return HandleType(ref, buf);
}
template <typename EntryT, typename RefT>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::allocArray()
{
_store.ensure_buffer_capacity(_typeId, 1);
uint32_t buffer_id = _store.primary_buffer_id(_typeId);
BufferState &state = _store.getBufferState(buffer_id);
assert(state.isActive());
RefT ref(state.size(), buffer_id);
auto array_size = state.getArraySize();
EntryT *buf = _store.template getEntryArray<EntryT>(ref, array_size);
for (size_t i = 0; i < array_size; ++i) {
new (static_cast<void *>(buf + i)) EntryT();
}
state.stats().pushed_back(1);
return HandleType(ref, buf);
}
template <typename EntryT, typename RefT>
template <typename BufferType>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::alloc_dynamic_array(ConstArrayRef array)
{
_store.ensure_buffer_capacity(_typeId, 1);
uint32_t buffer_id = _store.primary_buffer_id(_typeId);
BufferState &state = _store.getBufferState(buffer_id);
assert(state.isActive());
auto max_array_size = state.getArraySize();
assert(max_array_size >= array.size());
RefT ref(state.size(), buffer_id);
auto entry_size = _store.get_entry_size(_typeId);
EntryT* buf = BufferType::get_entry(_store.getBuffer(ref.bufferId()), ref.offset(), entry_size);
for (size_t i = 0; i < array.size(); ++i) {
new (static_cast<void *>(buf + i)) EntryT(array[i]);
}
for (size_t i = array.size(); i < max_array_size; ++i) {
new (static_cast<void *>(buf + i)) EntryT();
}
BufferType::set_dynamic_array_size(buf, array.size());
state.stats().pushed_back(1);
return HandleType(ref, buf);
}
}
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