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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "compact_words_store.h"
#include <vespa/vespalib/datastore/datastore.hpp>
#include <vespa/vespalib/stllike/hash_map.hpp>
#include <vespa/log/log.h>
LOG_SETUP(".memoryindex.compact_words_store");
namespace search::memoryindex {
using Builder = CompactWordsStore::Builder;
namespace {
constexpr size_t MIN_BUFFER_ARRAYS = 1024u;
size_t
getSerializedSize(const Builder &builder)
{
size_t size = 1 + builder.words().size(); // numWords, [words]
return size;
}
uint32_t *
serialize(const Builder &builder, uint32_t *begin)
{
uint32_t *buf = begin;
const Builder::WordRefVector &words = builder.words();
*buf++ = words.size();
for (auto word : words) {
*buf++ = word.ref();
}
return buf;
}
}
CompactWordsStore::Builder::Builder(uint32_t docId_)
: _docId(docId_),
_words()
{ }
CompactWordsStore::Builder::~Builder() { }
CompactWordsStore::Builder &
CompactWordsStore::Builder::insert(vespalib::datastore::EntryRef wordRef)
{
_words.push_back(wordRef);
return *this;
}
inline void
CompactWordsStore::Iterator::nextWord()
{
_wordRef = *_buf++;
_remainingWords--;
}
CompactWordsStore::Iterator::Iterator()
: _buf(nullptr),
_remainingWords(0),
_wordRef(0),
_valid(false)
{
}
CompactWordsStore::Iterator::Iterator(const uint32_t *buf)
: _buf(buf),
_remainingWords(0),
_wordRef(0),
_valid(true)
{
_remainingWords = *_buf++;
if (_remainingWords > 0) {
nextWord();
} else {
_valid = false;
}
}
CompactWordsStore::Iterator &
CompactWordsStore::Iterator::operator++()
{
if (_remainingWords > 0) {
nextWord();
} else {
_valid = false;
}
return *this;
}
CompactWordsStore::Store::Store()
: _store(),
_type(1,
MIN_BUFFER_ARRAYS,
RefType::offsetSize()),
_typeId(0)
{
_store.addType(&_type);
_store.init_primary_buffers();
}
CompactWordsStore::Store::~Store()
{
_store.dropBuffers();
}
vespalib::datastore::EntryRef
CompactWordsStore::Store::insert(const Builder &builder)
{
size_t serializedSize = getSerializedSize(builder);
auto result = _store.rawAllocator<uint32_t>(_typeId).alloc(serializedSize);
uint32_t *begin = result.data;
uint32_t *end = serialize(builder, begin);
assert(size_t(end - begin) == serializedSize);
(void) end;
return result.ref;
}
CompactWordsStore::Iterator
CompactWordsStore::Store::get(vespalib::datastore::EntryRef wordRef) const
{
RefType internalRef(wordRef);
const uint32_t *buf = _store.getEntry<uint32_t>(internalRef);
return Iterator(buf);
}
CompactWordsStore::CompactWordsStore()
: _docs(),
_docs_used_bytes(0),
_docs_allocated_bytes(0),
_wordsStore()
{
update_docs_memory_usage();
}
CompactWordsStore::~CompactWordsStore() { }
void
CompactWordsStore::insert(const Builder &builder)
{
vespalib::datastore::EntryRef wordRef = _wordsStore.insert(builder);
auto insres = _docs.insert(std::make_pair(builder.docId(), wordRef));
if (!insres.second) {
LOG(error, "Failed inserting remove info for docid %u",
builder.docId());
LOG_ABORT("should not be reached");
}
}
void
CompactWordsStore::remove(uint32_t docId)
{
_docs.erase(docId);
}
CompactWordsStore::Iterator
CompactWordsStore::get(uint32_t docId) const
{
auto itr = _docs.find(docId);
if (itr != _docs.end()) {
return _wordsStore.get(itr->second);
}
return Iterator();
}
void
CompactWordsStore::update_docs_memory_usage()
{
_docs_used_bytes.store(_docs.getMemoryUsed(), std::memory_order_relaxed);
_docs_allocated_bytes.store(_docs.getMemoryConsumption(), std::memory_order_relaxed);
}
void
CompactWordsStore::commit()
{
update_docs_memory_usage();
}
vespalib::MemoryUsage
CompactWordsStore::getMemoryUsage() const
{
vespalib::MemoryUsage usage;
usage.incAllocatedBytes(_docs_allocated_bytes.load(std::memory_order_relaxed));
usage.incUsedBytes(_docs_used_bytes.load(std::memory_order_relaxed));
usage.merge(_wordsStore.getMemoryUsage());
return usage;
}
}
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