First release of open-appsec source code

core/singleton/singleton.cc

@@ -0,0 +1,44 @@
+// Copyright (C) 2022 Check Point Software Technologies Ltd. All rights reserved.
+
+// Licensed under the Apache License, Version 2.0 (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 "singleton.h"
+#include "debug.h"
+
+void
+Singleton::registerSingleton(std::type_index type, void *ptr)
+{
+    singles[type].insert(ptr);
+}
+
+void
+Singleton::unregisterSingleton(std::type_index type, void *ptr)
+{
+    singles[type].erase(ptr);
+}
+
+void *
+Singleton::get(const std::type_index &type)
+{
+    dbgAssert(singles[type].size() == 1) << "There is no single element from type '" << type.name() << "', "
+        "number of elements is " << singles[type].size();
+    return *(singles[type].begin());
+}
+
+bool
+Singleton::exists(const std::type_index &type)
+{
+    return singles[type].size() != 0;
+}
+
+std::map<std::type_index, std::set<void *>> Singleton::singles;
+std::map<std::type_index, std::unique_ptr<Singleton::OwnedSingleton>> Singleton::owned_singles;