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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "bitvectoridxfile.h"
#include <vespa/searchlib/common/fileheadercontext.h>
#include <vespa/searchlib/index/bitvectorkeys.h>
#include <vespa/searchlib/util/file_settings.h>
#include <vespa/vespalib/data/fileheader.h>
#include <vespa/vespalib/util/size_literals.h>
#include <vespa/fastlib/io/bufferedfile.h>
#include <cassert>
namespace search::diskindex {
using search::index::BitVectorWordSingleKey;
using search::common::FileHeaderContext;
namespace {
void
readHeader(vespalib::FileHeader &h, const vespalib::string &name)
{
Fast_BufferedFile file(32_Ki);
file.ReadOpenExisting(name.c_str());
h.readFile(file);
}
}
BitVectorIdxFileWrite::BitVectorIdxFileWrite(BitVectorKeyScope scope)
: _idxFile(),
_numKeys(0),
_docIdLimit(0),
_idxHeaderLen(0),
_scope(scope)
{
}
BitVectorIdxFileWrite::~BitVectorIdxFileWrite() = default;
uint64_t
BitVectorIdxFileWrite::idxSize() const
{
return _idxHeaderLen +
static_cast<int64_t>(_numKeys) * sizeof(BitVectorWordSingleKey);
}
void
BitVectorIdxFileWrite::open(const vespalib::string &name,
uint32_t docIdLimit,
const TuneFileSeqWrite &tuneFileWrite,
const FileHeaderContext &fileHeaderContext)
{
if (_numKeys != 0) {
assert(docIdLimit == _docIdLimit);
} else {
_docIdLimit = docIdLimit;
}
vespalib::string idxname = name + getBitVectorKeyScopeSuffix(_scope);
assert( !_idxFile);
_idxFile = std::make_unique<Fast_BufferedFile>(new FastOS_File());
if (tuneFileWrite.getWantSyncWrites()) {
_idxFile->EnableSyncWrites();
}
if (tuneFileWrite.getWantDirectIO()) {
_idxFile->EnableDirectIO();
}
_idxFile->WriteOpen(idxname.c_str());
if (_idxHeaderLen == 0) {
assert(_numKeys == 0);
makeIdxHeader(fileHeaderContext);
}
int64_t pos = idxSize();
int64_t oldidxsize = _idxFile->getSize();
assert(oldidxsize >= pos);
(void) oldidxsize;
_idxFile->SetSize(pos);
assert(pos == _idxFile->getPosition());
}
void
BitVectorIdxFileWrite::makeIdxHeader(const FileHeaderContext &fileHeaderContext)
{
vespalib::FileHeader h(FileSettings::DIRECTIO_ALIGNMENT);
using Tag = vespalib::GenericHeader::Tag;
fileHeaderContext.addTags(h, _idxFile->GetFileName());
h.putTag(Tag("docIdLimit", _docIdLimit));
h.putTag(Tag("numKeys", _numKeys));
h.putTag(Tag("frozen", 0));
if (_scope != BitVectorKeyScope::SHARED_WORDS) {
h.putTag(Tag("fileBitSize", 0));
}
h.putTag(Tag("desc", "Bitvector dictionary file, single words"));
_idxFile->SetPosition(0);
_idxHeaderLen = h.writeFile(*_idxFile);
_idxFile->Flush();
}
void
BitVectorIdxFileWrite::updateIdxHeader(uint64_t fileBitSize)
{
vespalib::FileHeader h(FileSettings::DIRECTIO_ALIGNMENT);
using Tag = vespalib::GenericHeader::Tag;
readHeader(h, _idxFile->GetFileName());
FileHeaderContext::setFreezeTime(h);
h.putTag(Tag("numKeys", _numKeys));
h.putTag(Tag("frozen", 1));
if (_scope != BitVectorKeyScope::SHARED_WORDS) {
h.putTag(Tag("fileBitSize", fileBitSize));
}
bool sync_ok = _idxFile->Sync();
assert(sync_ok);
assert(h.getSize() == _idxHeaderLen);
_idxFile->SetPosition(0);
h.writeFile(*_idxFile);
sync_ok = _idxFile->Sync();
assert(sync_ok);
}
void
BitVectorIdxFileWrite::addWordSingle(uint64_t wordNum, uint32_t numDocs)
{
BitVectorWordSingleKey key;
key._wordNum = wordNum;
key._numDocs = numDocs;
_idxFile->WriteBuf(&key, sizeof(key));
++_numKeys;
}
void
BitVectorIdxFileWrite::flush()
{
_idxFile->Flush();
uint64_t pos = _idxFile->getPosition();
assert(pos == idxSize());
(void) pos;
}
void
BitVectorIdxFileWrite::syncCommon()
{
bool sync_ok = _idxFile->Sync();
assert(sync_ok);
}
void
BitVectorIdxFileWrite::sync()
{
flush();
syncCommon();
}
void
BitVectorIdxFileWrite::close()
{
if (_idxFile) {
if (_idxFile->IsOpened()) {
uint64_t pos = _idxFile->getPosition();
assert(pos == idxSize());
_idxFile->alignEndForDirectIO();
updateIdxHeader(pos * 8);
bool close_ok = _idxFile->Close();
assert(close_ok);
}
_idxFile.reset();
}
}
}
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