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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "bitvectorfile.h"
#include <vespa/searchlib/common/bitvector.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);
}
}
BitVectorFileWrite::BitVectorFileWrite(BitVectorKeyScope scope)
: BitVectorIdxFileWrite(scope),
_datFile(),
_datHeaderLen(0)
{
}
BitVectorFileWrite::~BitVectorFileWrite() = default;
void
BitVectorFileWrite::open(const vespalib::string &name,
uint32_t docIdLimit,
const TuneFileSeqWrite &tuneFileWrite,
const FileHeaderContext &fileHeaderContext)
{
vespalib::string datname = name + ".bdat";
assert( ! _datFile);
Parent::open(name, docIdLimit, tuneFileWrite, fileHeaderContext);
_datFile = std::make_unique<Fast_BufferedFile>(new FastOS_File);
if (tuneFileWrite.getWantSyncWrites()) {
_datFile->EnableSyncWrites();
}
if (tuneFileWrite.getWantDirectIO()) {
_datFile->EnableDirectIO();
}
_datFile->WriteOpen(datname.c_str());
if (_datHeaderLen == 0) {
assert(_numKeys == 0);
makeDatHeader(fileHeaderContext);
}
int64_t pos;
size_t bitmapbytes;
bitmapbytes = BitVector::getFileBytes(_docIdLimit);
pos = static_cast<int64_t>(_numKeys) *
static_cast<int64_t>(bitmapbytes) + _datHeaderLen;
int64_t olddatsize = _datFile->getSize();
assert(olddatsize >= pos);
(void) olddatsize;
_datFile->SetSize(pos);
assert(pos == _datFile->getPosition());
}
void
BitVectorFileWrite::makeDatHeader(const FileHeaderContext &fileHeaderContext)
{
vespalib::FileHeader h(FileSettings::DIRECTIO_ALIGNMENT);
using Tag = vespalib::GenericHeader::Tag;
fileHeaderContext.addTags(h, _datFile->GetFileName());
h.putTag(Tag("docIdLimit", _docIdLimit));
h.putTag(Tag("numKeys", _numKeys));
h.putTag(Tag("frozen", 0));
h.putTag(Tag("fileBitSize", 0));
h.putTag(Tag("desc", "Bitvector data file"));
_datFile->SetPosition(0);
_datHeaderLen = h.writeFile(*_datFile);
_datFile->Flush();
}
void
BitVectorFileWrite::updateDatHeader(uint64_t fileBitSize)
{
vespalib::FileHeader h(FileSettings::DIRECTIO_ALIGNMENT);
using Tag = vespalib::GenericHeader::Tag;
readHeader(h, _datFile->GetFileName());
FileHeaderContext::setFreezeTime(h);
h.putTag(Tag("numKeys", _numKeys));
h.putTag(Tag("frozen", 1));
h.putTag(Tag("fileBitSize", fileBitSize));
bool sync_ok = _datFile->Sync();
assert(sync_ok);
assert(h.getSize() == _datHeaderLen);
_datFile->SetPosition(0);
h.writeFile(*_datFile);
sync_ok = _datFile->Sync();
assert(sync_ok);
}
void
BitVectorFileWrite::addWordSingle(uint64_t wordNum,
const BitVector &bitVector)
{
assert(bitVector.size() == _docIdLimit);
bitVector.invalidateCachedCount();
Parent::addWordSingle(wordNum, bitVector.countTrueBits());
_datFile->WriteBuf(bitVector.getStart(),
bitVector.getFileBytes());
}
void
BitVectorFileWrite::flush()
{
Parent::flush();
_datFile->Flush();
}
void
BitVectorFileWrite::sync()
{
flush();
Parent::syncCommon();
bool sync_ok = _datFile->Sync();
assert(sync_ok);
}
void
BitVectorFileWrite::close()
{
size_t bitmapbytes = BitVector::getFileBytes(_docIdLimit);
if (_datFile != nullptr) {
if (_datFile->IsOpened()) {
uint64_t pos = _datFile->getPosition();
assert(pos == static_cast<uint64_t>(_numKeys) *
static_cast<uint64_t>(bitmapbytes) + _datHeaderLen);
(void) bitmapbytes;
_datFile->alignEndForDirectIO();
updateDatHeader(pos * 8);
bool close_ok = _datFile->Close();
assert(close_ok);
}
_datFile.reset();
}
Parent::close();
}
BitVectorCandidate::~BitVectorCandidate() = default;
}
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