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Optimize usage of Status in CompactionJob

Browse Source 
Summary: Based on @ljin feedback

Test Plan: compiles

Reviewers: ljin, yhchiang, sdong

Reviewed By: sdong

Subscribers: ljin, dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D28515
This commit is contained in:
Igor Canadi 2014-11-10 11:57:58 -08:00
parent bcdb9671c0
commit 4a3bd2bad2
3 changed files with 12 additions and 15 deletions
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13
db/compaction_job.cc
View File

@ -455,14 +455,14 @@ Status CompactionJob::Run() {
return status;
}
Status CompactionJob::Install(Status status, port::Mutex* db_mutex) {
void CompactionJob::Install(Status* status, port::Mutex* db_mutex) {
db_mutex->AssertHeld();
ColumnFamilyData* cfd = compact_->compaction->column_family_data();
cfd->internal_stats()->AddCompactionStats(
compact_->compaction->output_level(), compaction_stats_);
if (status.ok()) {
status = InstallCompactionResults(db_mutex);
if (status->ok()) {
*status = InstallCompactionResults(db_mutex);
}
VersionStorageInfo::LevelSummaryStorage tmp;
const auto& stats = compaction_stats_;
@ -483,11 +483,10 @@ Status CompactionJob::Install(Status status, port::Mutex* db_mutex) {
(stats.bytes_written + stats.bytes_readnp1 + stats.bytes_readn) /
static_cast<double>(stats.bytes_readn),
stats.bytes_written / static_cast<double>(stats.bytes_readn),
status.ToString().c_str(), stats.num_input_records,
status->ToString().c_str(), stats.num_input_records,
stats.num_dropped_records);
CleanupCompaction(status);
return status;
CleanupCompaction(*status);
}
Status CompactionJob::ProcessKeyValueCompaction(int64_t* imm_micros,
@ -1054,7 +1053,7 @@ Status CompactionJob::OpenCompactionOutputFile() {
return s;
}
void CompactionJob::CleanupCompaction(Status status) {
void CompactionJob::CleanupCompaction(const Status& status) {
if (compact_->builder != nullptr) {
// May happen if we get a shutdown call in the middle of compaction
compact_->builder->Abandon();

4
db/compaction_job.h
View File

@ -75,7 +75,7 @@ class CompactionJob {
Status Run();
// REQUIRED: mutex held
// status is the return of Run()
Status Install(Status status, port::Mutex* db_mutex);
void Install(Status* status, port::Mutex* db_mutex);
private:
void AllocateCompactionOutputFileNumbers();
@ -92,7 +92,7 @@ class CompactionJob {
SequenceNumber* prev_snapshot);
void RecordCompactionIOStats();
Status OpenCompactionOutputFile();
void CleanupCompaction(Status status);
void CleanupCompaction(const Status& status);
// CompactionJob state
struct CompactionState;

6
db/db_impl.cc
View File

@ -1295,13 +1295,11 @@ Status DBImpl::CompactFilesImpl(
mutex_.Unlock();
Status status = compaction_job.Run();
mutex_.Lock();
if (status.ok()) {
status = compaction_job.Install(status, &mutex_);
compaction_job.Install(&status, &mutex_);
if (status.ok()) {
InstallSuperVersionBackground(c->column_family_data(), &job_context,
*c->mutable_cf_options());
}
}
c->ReleaseCompactionFiles(s);
c->ReleaseInputs();
c.reset();
@ -2070,7 +2068,7 @@ Status DBImpl::BackgroundCompaction(bool* madeProgress, JobContext* job_context,
mutex_.Unlock();
status = compaction_job.Run();
mutex_.Lock();
status = compaction_job.Install(status, &mutex_);
compaction_job.Install(&status, &mutex_);
if (status.ok()) {
InstallSuperVersionBackground(c->column_family_data(), job_context,
*c->mutable_cf_options());