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#include <sys/stat.h>
#include <string>
#include <utility>
#include <vector>
#include "caffe/caffe.hpp"
#include "caffe/lmdb_dataset.hpp"
namespace caffe {
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::open(const string& filename,
Mode mode) {
DLOG(INFO) << "LMDB: Open " << filename;
CHECK(NULL == env_);
CHECK(NULL == write_txn_);
CHECK(NULL == read_txn_);
CHECK_EQ(0, dbi_);
int retval;
if (mode != Base::ReadOnly) {
retval = mkdir(filename.c_str(), 0744);
switch (mode) {
case Base::New:
if (0 != retval) {
LOG(ERROR) << "mkdir " << filename << " failed";
return false;
}
break;
case Base::ReadWrite:
if (-1 == retval && EEXIST != errno) {
LOG(ERROR) << "mkdir " << filename << " failed ("
<< strerror(errno) << ")";
return false;
}
break;
default:
LOG(FATAL) << "Invalid mode " << mode;
}
}
retval = mdb_env_create(&env_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_env_create failed "
<< mdb_strerror(retval);
return false;
}
retval = mdb_env_set_mapsize(env_, 1099511627776);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_env_set_mapsize failed " << mdb_strerror(retval);
return false;
}
int flag1 = 0;
int flag2 = 0;
if (mode == Base::ReadOnly) {
// No locking, assume db is not written to at the same time, otherwise
// LMDB tries to lock the file, which fails if it's read-only
flag1 = MDB_RDONLY | MDB_NOTLS | MDB_NOLOCK;
flag2 = MDB_RDONLY;
}
// Allow DB to be stand-alone file
{
struct stat st_buf;
stat (filename.c_str(), &st_buf);
if (S_ISREG (st_buf.st_mode)) {
flag1 |= MDB_NOSUBDIR;
}
}
retval = mdb_env_open(env_, filename.c_str(), flag1, 0664);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_env_open failed " << mdb_strerror(retval);
return false;
}
retval = mdb_txn_begin(env_, NULL, MDB_RDONLY, &read_txn_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_txn_begin failed " << mdb_strerror(retval);
return false;
}
retval = mdb_txn_begin(env_, NULL, flag2, &write_txn_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_txn_begin failed " << mdb_strerror(retval);
return false;
}
retval = mdb_open(write_txn_, NULL, 0, &dbi_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_open failed" << mdb_strerror(retval);
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::put(const K& key, const V& value) {
DLOG(INFO) << "LMDB: Put";
vector<char> serialized_key;
if (!KCoder::serialize(key, &serialized_key)) {
LOG(ERROR) << "failed to serialize key";
return false;
}
vector<char> serialized_value;
if (!VCoder::serialize(value, &serialized_value)) {
LOG(ERROR) << "failed to serialized value";
return false;
}
MDB_val mdbkey, mdbdata;
mdbdata.mv_size = serialized_value.size();
mdbdata.mv_data = serialized_value.data();
mdbkey.mv_size = serialized_key.size();
mdbkey.mv_data = serialized_key.data();
CHECK_NOTNULL(write_txn_);
CHECK_NE(0, dbi_);
int retval = mdb_put(write_txn_, dbi_, &mdbkey, &mdbdata, 0);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_put failed " << mdb_strerror(retval);
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::get(const K& key, V* value) {
DLOG(INFO) << "LMDB: Get";
vector<char> serialized_key;
if (!KCoder::serialize(key, &serialized_key)) {
LOG(ERROR) << "failed to serialized key";
return false;
}
MDB_val mdbkey, mdbdata;
mdbkey.mv_data = serialized_key.data();
mdbkey.mv_size = serialized_key.size();
int retval;
retval = mdb_get(read_txn_, dbi_, &mdbkey, &mdbdata);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_get failed " << mdb_strerror(retval);
return false;
}
if (!VCoder::deserialize(reinterpret_cast<char*>(mdbdata.mv_data),
mdbdata.mv_size, value)) {
LOG(ERROR) << "failed to deserialize value";
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::first_key(K* key) {
DLOG(INFO) << "LMDB: First key";
int retval;
MDB_cursor* cursor;
retval = mdb_cursor_open(read_txn_, dbi_, &cursor);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
MDB_val mdbkey;
MDB_val mdbval;
retval = mdb_cursor_get(cursor, &mdbkey, &mdbval, MDB_FIRST);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
mdb_cursor_close(cursor);
if (!KCoder::deserialize(reinterpret_cast<char*>(mdbkey.mv_data),
mdbkey.mv_size, key)) {
LOG(ERROR) << "failed to deserialize key";
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::last_key(K* key) {
DLOG(INFO) << "LMDB: Last key";
int retval;
MDB_cursor* cursor;
retval = mdb_cursor_open(read_txn_, dbi_, &cursor);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
MDB_val mdbkey;
MDB_val mdbval;
retval = mdb_cursor_get(cursor, &mdbkey, &mdbval, MDB_LAST);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
mdb_cursor_close(cursor);
if (!KCoder::deserialize(reinterpret_cast<char*>(mdbkey.mv_data),
mdbkey.mv_size, key)) {
LOG(ERROR) << "failed to deserialize key";
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::commit() {
DLOG(INFO) << "LMDB: Commit";
CHECK_NOTNULL(write_txn_);
int retval;
retval = mdb_txn_commit(write_txn_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_txn_commit failed " << mdb_strerror(retval);
return false;
}
mdb_txn_abort(read_txn_);
retval = mdb_txn_begin(env_, NULL, 0, &write_txn_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_txn_begin failed " << mdb_strerror(retval);
return false;
}
retval = mdb_txn_begin(env_, NULL, MDB_RDONLY, &read_txn_);
if (MDB_SUCCESS != retval) {
LOG(ERROR) << "mdb_txn_begin failed " << mdb_strerror(retval);
return false;
}
return true;
}
template <typename K, typename V, typename KCoder, typename VCoder>
void LmdbDataset<K, V, KCoder, VCoder>::close() {
DLOG(INFO) << "LMDB: Close";
if (env_ && dbi_) {
mdb_txn_abort(write_txn_);
mdb_txn_abort(read_txn_);
mdb_close(env_, dbi_);
mdb_env_close(env_);
env_ = NULL;
dbi_ = 0;
write_txn_ = NULL;
read_txn_ = NULL;
}
}
template <typename K, typename V, typename KCoder, typename VCoder>
void LmdbDataset<K, V, KCoder, VCoder>::keys(vector<K>* keys) {
DLOG(INFO) << "LMDB: Keys";
keys->clear();
for (const_iterator iter = begin(); iter != end(); ++iter) {
keys->push_back(iter->key);
}
}
template <typename K, typename V, typename KCoder, typename VCoder>
typename LmdbDataset<K, V, KCoder, VCoder>::const_iterator
LmdbDataset<K, V, KCoder, VCoder>::begin() const {
int retval;
MDB_cursor* cursor;
retval = mdb_cursor_open(read_txn_, dbi_, &cursor);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
MDB_val key;
MDB_val val;
retval = mdb_cursor_get(cursor, &key, &val, MDB_FIRST);
CHECK(MDB_SUCCESS == retval || MDB_NOTFOUND == retval)
<< mdb_strerror(retval);
shared_ptr<DatasetState> state;
if (MDB_SUCCESS == retval) {
state.reset(new LmdbState(cursor, read_txn_, &dbi_));
} else {
mdb_cursor_close(cursor);
}
return const_iterator(this, state);
}
template <typename K, typename V, typename KCoder, typename VCoder>
typename LmdbDataset<K, V, KCoder, VCoder>::const_iterator
LmdbDataset<K, V, KCoder, VCoder>::end() const {
shared_ptr<DatasetState> state;
return const_iterator(this, state);
}
template <typename K, typename V, typename KCoder, typename VCoder>
typename LmdbDataset<K, V, KCoder, VCoder>::const_iterator
LmdbDataset<K, V, KCoder, VCoder>::cbegin() const { return begin(); }
template <typename K, typename V, typename KCoder, typename VCoder>
typename LmdbDataset<K, V, KCoder, VCoder>::const_iterator
LmdbDataset<K, V, KCoder, VCoder>::cend() const { return end(); }
template <typename K, typename V, typename KCoder, typename VCoder>
bool LmdbDataset<K, V, KCoder, VCoder>::equal(shared_ptr<DatasetState> state1,
shared_ptr<DatasetState> state2) const {
shared_ptr<LmdbState> lmdb_state1 =
boost::dynamic_pointer_cast<LmdbState>(state1);
shared_ptr<LmdbState> lmdb_state2 =
boost::dynamic_pointer_cast<LmdbState>(state2);
// The KV store doesn't really have any sort of ordering,
// so while we can do a sequential scan over the collection,
// we can't really use subranges.
return !lmdb_state1 && !lmdb_state2;
}
template <typename K, typename V, typename KCoder, typename VCoder>
void LmdbDataset<K, V, KCoder, VCoder>::increment(
shared_ptr<DatasetState>* state) const {
shared_ptr<LmdbState> lmdb_state =
boost::dynamic_pointer_cast<LmdbState>(*state);
CHECK_NOTNULL(lmdb_state.get());
MDB_cursor*& cursor = lmdb_state->cursor_;
CHECK_NOTNULL(cursor);
MDB_val key;
MDB_val val;
int retval = mdb_cursor_get(cursor, &key, &val, MDB_NEXT);
if (MDB_NOTFOUND == retval) {
mdb_cursor_close(cursor);
state->reset();
} else {
CHECK_EQ(MDB_SUCCESS, retval) << mdb_strerror(retval);
}
}
template <typename K, typename V, typename KCoder, typename VCoder>
typename Dataset<K, V, KCoder, VCoder>::KV&
LmdbDataset<K, V, KCoder, VCoder>::dereference(
shared_ptr<DatasetState> state) const {
shared_ptr<LmdbState> lmdb_state =
boost::dynamic_pointer_cast<LmdbState>(state);
CHECK_NOTNULL(lmdb_state.get());
MDB_cursor*& cursor = lmdb_state->cursor_;
CHECK_NOTNULL(cursor);
MDB_val mdb_key;
MDB_val mdb_val;
int retval = mdb_cursor_get(cursor, &mdb_key, &mdb_val, MDB_GET_CURRENT);
CHECK_EQ(retval, MDB_SUCCESS) << mdb_strerror(retval);
CHECK(KCoder::deserialize(reinterpret_cast<char*>(mdb_key.mv_data),
mdb_key.mv_size, &lmdb_state->kv_pair_.key));
CHECK(VCoder::deserialize(reinterpret_cast<char*>(mdb_val.mv_data),
mdb_val.mv_size, &lmdb_state->kv_pair_.value));
return lmdb_state->kv_pair_;
}
INSTANTIATE_DATASET(LmdbDataset);
} // namespace caffe