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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "allocator.h"
#include "bufferstate.h"
namespace search {
namespace 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.ensureBufferCapacity(_typeId, 1);
uint32_t activeBufferId = _store.getActiveBufferId(_typeId);
BufferState &state = _store.getBufferState(activeBufferId);
assert(state.isActive());
size_t oldBufferSize = state.size();
EntryT *entry = _store.getBufferEntry<EntryT>(activeBufferId, oldBufferSize);
new (static_cast<void *>(entry)) EntryT(std::forward<Args>(args)...);
state.pushed_back(1);
return HandleType(RefT(oldBufferSize, activeBufferId), entry);
}
template <typename EntryT, typename RefT>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::allocArray(ConstArrayRef array)
{
_store.ensureBufferCapacity(_typeId, array.size());
uint32_t activeBufferId = _store.getActiveBufferId(_typeId);
BufferState &state = _store.getBufferState(activeBufferId);
assert(state.isActive());
assert(state.getClusterSize() == array.size());
size_t oldBufferSize = state.size();
EntryT *buf = _store.template getBufferEntry<EntryT>(activeBufferId, oldBufferSize);
for (size_t i = 0; i < array.size(); ++i) {
new (static_cast<void *>(buf + i)) EntryT(array[i]);
}
state.pushed_back(array.size());
assert((oldBufferSize % array.size()) == 0);
return HandleType(RefT((oldBufferSize / array.size()), activeBufferId), buf);
}
template <typename EntryT, typename RefT>
typename Allocator<EntryT, RefT>::HandleType
Allocator<EntryT, RefT>::allocArray(size_t size)
{
_store.ensureBufferCapacity(_typeId, size);
uint32_t activeBufferId = _store.getActiveBufferId(_typeId);
BufferState &state = _store.getBufferState(activeBufferId);
assert(state.isActive());
assert(state.getClusterSize() == size);
size_t oldBufferSize = state.size();
EntryT *buf = _store.template getBufferEntry<EntryT>(activeBufferId, oldBufferSize);
for (size_t i = 0; i < size; ++i) {
new (static_cast<void *>(buf + i)) EntryT();
}
state.pushed_back(size);
assert((oldBufferSize % size) == 0);
return HandleType(RefT((oldBufferSize / size), activeBufferId), buf);
}
}
}
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