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/*
*
* 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.
*
*/
#include "qpid/linearstore/journal/enq_map.h"
#include "qpid/linearstore/journal/slock.h"
namespace qpid {
namespace linearstore {
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(){}
enq_map::~enq_map() {}
short
enq_map::insert_pfid(const uint64_t rid, const uint64_t pfid, const std::streampos file_posn)
{
return insert_pfid(rid, pfid, file_posn, false);
}
short
enq_map::insert_pfid(const uint64_t rid, const uint64_t pfid, const std::streampos file_posn, const bool locked)
{
std::pair<emap_itr, bool> ret;
emap_data_struct_t rec(pfid, file_posn, locked);
{
slock s(_mutex);
ret = _map.insert(emap_param(rid, rec));
}
if (ret.second == false)
return EMAP_DUP_RID;
return EMAP_OK;
}
short
enq_map::get_pfid(const uint64_t rid, uint64_t& pfid)
{
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;
pfid = itr->second._pfid;
return EMAP_OK;
}
short
enq_map::get_remove_pfid(const uint64_t rid, uint64_t& pfid, 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;
pfid = itr->second._pfid;
_map.erase(itr);
return EMAP_OK;
}
short
enq_map::get_file_posn(const uint64_t rid, std::streampos& file_posn) {
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;
file_posn = itr->second._file_posn;
return EMAP_OK;
}
short
enq_map::get_data(const uint64_t rid, emap_data_struct_t& eds) {
slock s(_mutex);
emap_itr itr = _map.find(rid);
if (itr == _map.end()) // not found in map
return EMAP_RID_NOT_FOUND;
eds._pfid = itr->second._pfid;
eds._file_posn = itr->second._file_posn;
eds._lock = itr->second._lock;
return EMAP_OK;
}
bool
enq_map::is_enqueued(const uint64_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;
}
short
enq_map::lock(const uint64_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;
}
short
enq_map::unlock(const uint64_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;
}
short
enq_map::is_locked(const uint64_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<uint64_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<uint64_t>& fv)
{
fv.clear();
{
slock s(_mutex);
for (emap_itr itr = _map.begin(); itr != _map.end(); itr++)
fv.push_back(itr->second._pfid);
}
}
}}}
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