gras: created element factory

1 files changed, 49 insertions, 0 deletions

diff --git a/lib/factory.cpp b/lib/factory.cpp
new file mode 100644
index 0000000..1c634fd
--- /dev/null
+++ b/lib/factory.cpp
@@ -0,0 +1,49 @@
+// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
+
+#include <gras/factory.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/thread/mutex.hpp>
+#include <stdexcept>
+#include <map>
+
+using namespace gras;
+
+FactoryRegistryEntry::FactoryRegistryEntry(void)
+{
+    //NOP
+}
+
+FactoryRegistryEntry::~FactoryRegistryEntry(void)
+{
+    //NOP
+}
+
+typedef std::map<std::string, boost::shared_ptr<FactoryRegistryEntry> > FactoryRegistryType;
+
+static FactoryRegistryType &get_factory_registry(void)
+{
+    static FactoryRegistryType r;
+    return r;
+}
+
+static boost::mutex mutex;
+
+void Factory::_register_make(const std::string &name, void *entry)
+{
+    boost::mutex::scoped_lock l(mutex);
+    if (get_factory_registry().count(name) != 0)
+    {
+        throw std::invalid_argument("Factory - function already registered for name: " + name);
+    }
+    get_factory_registry()[name].reset(reinterpret_cast<FactoryRegistryEntry *>(entry));
+}
+
+Element *Factory::_make(const std::string &name, const PMCC &args)
+{
+    boost::mutex::scoped_lock l(mutex);
+    if (get_factory_registry().count(name) == 0)
+    {
+        throw std::invalid_argument("Factory - no function registered for name: " + name);
+    }
+    return get_factory_registry()[name]->make(args);
+}