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Diffstat (limited to 'cpp/src/qpid/legacystore/jrnl/enq_map.cpp')
| -rw-r--r-- | cpp/src/qpid/legacystore/jrnl/enq_map.cpp | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/cpp/src/qpid/legacystore/jrnl/enq_map.cpp b/cpp/src/qpid/legacystore/jrnl/enq_map.cpp new file mode 100644 index 0000000000..d024b704a7 --- /dev/null +++ b/cpp/src/qpid/legacystore/jrnl/enq_map.cpp @@ -0,0 +1,183 @@ +/* + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + * + */ + +/** + * \file enq_map.cpp + * + * Qpid asynchronous store plugin library + * + * File containing code for class mrg::journal::enq_map (enqueue map). See + * comments in file enq_map.h for details. + * + * \author Kim van der Riet + */ + +#include "qpid/legacystore/jrnl/enq_map.h" + +#include <iomanip> +#include "qpid/legacystore/jrnl/jerrno.h" +#include "qpid/legacystore/jrnl/slock.h" +#include <sstream> + + +namespace mrg +{ +namespace journal +{ + +// static return/error codes +int16_t enq_map::EMAP_DUP_RID = -3; +int16_t enq_map::EMAP_LOCKED = -2; +int16_t enq_map::EMAP_RID_NOT_FOUND = -1; +int16_t enq_map::EMAP_OK = 0; +int16_t enq_map::EMAP_FALSE = 0; +int16_t enq_map::EMAP_TRUE = 1; + +enq_map::enq_map(): + _map(), + _pfid_enq_cnt() +{} + +enq_map::~enq_map() {} + +void +enq_map::set_num_jfiles(const u_int16_t num_jfiles) +{ + _pfid_enq_cnt.resize(num_jfiles, 0); +} + + +int16_t +enq_map::insert_pfid(const u_int64_t rid, const u_int16_t pfid) +{ + return insert_pfid(rid, pfid, false); +} + +int16_t +enq_map::insert_pfid(const u_int64_t rid, const u_int16_t pfid, const bool locked) +{ + std::pair<emap_itr, bool> ret; + emap_data_struct rec(pfid, locked); + { + slock s(_mutex); + ret = _map.insert(emap_param(rid, rec)); + } + if (ret.second == false) + return EMAP_DUP_RID; + _pfid_enq_cnt.at(pfid)++; + return EMAP_OK; +} + +int16_t +enq_map::get_pfid(const u_int64_t rid) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return EMAP_RID_NOT_FOUND; + if (itr->second._lock) + return EMAP_LOCKED; + return itr->second._pfid; +} + +int16_t +enq_map::get_remove_pfid(const u_int64_t rid, const bool txn_flag) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return EMAP_RID_NOT_FOUND; + if (itr->second._lock && !txn_flag) // locked, but not a commit/abort + return EMAP_LOCKED; + u_int16_t pfid = itr->second._pfid; + _map.erase(itr); + _pfid_enq_cnt.at(pfid)--; + return pfid; +} + +bool +enq_map::is_enqueued(const u_int64_t rid, bool ignore_lock) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return false; + if (!ignore_lock && itr->second._lock) // locked + return false; + return true; +} + +int16_t +enq_map::lock(const u_int64_t rid) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return EMAP_RID_NOT_FOUND; + itr->second._lock = true; + return EMAP_OK; +} + +int16_t +enq_map::unlock(const u_int64_t rid) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return EMAP_RID_NOT_FOUND; + itr->second._lock = false; + return EMAP_OK; +} + +int16_t +enq_map::is_locked(const u_int64_t rid) +{ + slock s(_mutex); + emap_itr itr = _map.find(rid); + if (itr == _map.end()) // not found in map + return EMAP_RID_NOT_FOUND; + return itr->second._lock ? EMAP_TRUE : EMAP_FALSE; +} + +void +enq_map::rid_list(std::vector<u_int64_t>& rv) +{ + rv.clear(); + { + slock s(_mutex); + for (emap_itr itr = _map.begin(); itr != _map.end(); itr++) + rv.push_back(itr->first); + } +} + +void +enq_map::pfid_list(std::vector<u_int16_t>& fv) +{ + fv.clear(); + { + slock s(_mutex); + for (emap_itr itr = _map.begin(); itr != _map.end(); itr++) + fv.push_back(itr->second._pfid); + } +} + +} // namespace journal +} // namespace mrg |