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Squashed 'src/leveldb/' changes from be1b0ff..936b461

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936b461 Merge upstream LevelDB 1.13.
748539c LevelDB 1.13

git-subtree-dir: src/leveldb
git-subtree-split: 936b4613ea4551992e6096b1e05eeefc09a20e3b
This commit is contained in:
Pieter Wuille
2013-08-24 22:21:41 +02:00
parent 1bb86d6f15
commit eed29f0f50
13 changed files with 363 additions and 67 deletions
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41
db/db_impl.cc
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@@ -113,14 +113,14 @@ Options SanitizeOptions(const std::string& dbname,
return result;
}
DBImpl::DBImpl(const Options& options, const std::string& dbname)
: env_(options.env),
internal_comparator_(options.comparator),
internal_filter_policy_(options.filter_policy),
options_(SanitizeOptions(
dbname, &internal_comparator_, &internal_filter_policy_, options)),
owns_info_log_(options_.info_log != options.info_log),
owns_cache_(options_.block_cache != options.block_cache),
DBImpl::DBImpl(const Options& raw_options, const std::string& dbname)
: env_(raw_options.env),
internal_comparator_(raw_options.comparator),
internal_filter_policy_(raw_options.filter_policy),
options_(SanitizeOptions(dbname, &internal_comparator_,
&internal_filter_policy_, raw_options)),
owns_info_log_(options_.info_log != raw_options.info_log),
owns_cache_(options_.block_cache != raw_options.block_cache),
dbname_(dbname),
db_lock_(NULL),
shutting_down_(NULL),
@@ -130,6 +130,7 @@ DBImpl::DBImpl(const Options& options, const std::string& dbname)
logfile_(NULL),
logfile_number_(0),
log_(NULL),
seed_(0),
tmp_batch_(new WriteBatch),
bg_compaction_scheduled_(false),
manual_compaction_(NULL),
@@ -138,7 +139,7 @@ DBImpl::DBImpl(const Options& options, const std::string& dbname)
has_imm_.Release_Store(NULL);
// Reserve ten files or so for other uses and give the rest to TableCache.
const int table_cache_size = options.max_open_files - kNumNonTableCacheFiles;
const int table_cache_size = options_.max_open_files - kNumNonTableCacheFiles;
table_cache_ = new TableCache(dbname_, &options_, table_cache_size);
versions_ = new VersionSet(dbname_, &options_, table_cache_,
@@ -1027,7 +1028,8 @@ static void CleanupIteratorState(void* arg1, void* arg2) {
} // namespace
Iterator* DBImpl::NewInternalIterator(const ReadOptions& options,
SequenceNumber* latest_snapshot) {
SequenceNumber* latest_snapshot,
uint32_t* seed) {
IterState* cleanup = new IterState;
mutex_.Lock();
*latest_snapshot = versions_->LastSequence();
@@ -1051,13 +1053,15 @@ Iterator* DBImpl::NewInternalIterator(const ReadOptions& options,
cleanup->version = versions_->current();
internal_iter->RegisterCleanup(CleanupIteratorState, cleanup, NULL);
*seed = ++seed_;
mutex_.Unlock();
return internal_iter;
}
Iterator* DBImpl::TEST_NewInternalIterator() {
SequenceNumber ignored;
return NewInternalIterator(ReadOptions(), &ignored);
uint32_t ignored_seed;
return NewInternalIterator(ReadOptions(), &ignored, &ignored_seed);
}
int64_t DBImpl::TEST_MaxNextLevelOverlappingBytes() {
@@ -1114,12 +1118,21 @@ Status DBImpl::Get(const ReadOptions& options,
Iterator* DBImpl::NewIterator(const ReadOptions& options) {
SequenceNumber latest_snapshot;
Iterator* internal_iter = NewInternalIterator(options, &latest_snapshot);
uint32_t seed;
Iterator* iter = NewInternalIterator(options, &latest_snapshot, &seed);
return NewDBIterator(
&dbname_, env_, user_comparator(), internal_iter,
this, user_comparator(), iter,
(options.snapshot != NULL
? reinterpret_cast<const SnapshotImpl*>(options.snapshot)->number_
: latest_snapshot));
: latest_snapshot),
seed);
}
void DBImpl::RecordReadSample(Slice key) {
MutexLock l(&mutex_);
if (versions_->current()->RecordReadSample(key)) {
MaybeScheduleCompaction();
}
}
const Snapshot* DBImpl::GetSnapshot() {