1 files changed, 181 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/linearstore/journal/enq_map.cpp b/qpid/cpp/src/qpid/linearstore/journal/enq_map.cpp
new file mode 100644
index 0000000000..4eaaa64992
--- /dev/null
+++ b/qpid/cpp/src/qpid/linearstore/journal/enq_map.cpp
@@ -0,0 +1,181 @@
+/*
+ *
+ * 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);
+    }
+}
+
+}}}