1 files changed, 52 insertions, 0 deletions
diff --git a/project2/basics/preload.cpp b/project2/basics/preload.cpp
new file mode 100644
index 0000000..e8aa6e9
--- /dev/null
+++ b/project2/basics/preload.cpp
@@ -0,0 +1,52 @@
+#include <pch.hpp>
+#include <options.h>
+#include <boost/filesystem/path.hpp>
+#include <map>
+#include <dlfcn.h>
+
+using namespace boost::filesystem;
+
+class Preload {
+	public:
+		INITOPTIONS;
+
+	private:
+		typedef boost::shared_ptr<void> Library;
+		typedef std::map<path, Library> Libraries;
+
+		static void LoadLibrary(const VariableType & librarypath)
+		{
+			const auto beforeOpts = *Plugable::ComponentType<Options>::components();
+
+			void * handle = dlopen(librarypath, RTLD_NOW); 
+			if (handle) {
+				Logger()->messagebf(LOG_DEBUG, "Loaded library '%s'", librarypath.as<std::string>());
+			}
+			else {
+				Logger()->messagebf(LOG_ERR, "Failed to load library '%s' (%s)", librarypath.as<std::string>(), dlerror());
+				throw std::runtime_error("module load failed");
+			}
+			libs[librarypath.as<std::string>()] = boost::shared_ptr<void>(handle, &dlclose);
+
+			const auto afterOpts = Plugable::ComponentType<Options>::components();
+			BOOST_FOREACH(const auto & opt, *afterOpts) {
+				if (std::find(beforeOpts.begin(), beforeOpts.end(), opt) == beforeOpts.end()) {
+					opt->reset();
+				}
+			}
+		}
+
+		static void UnloadLibraries()
+		{
+			libs.clear();
+		}
+
+		static Libraries libs;
+};
+
+Preload::Libraries Preload::libs;
+
+DECLARE_OPTIONS(Preload, "Library preload options")
+("library", Options::functions(Preload::LoadLibrary, Preload::UnloadLibraries), "Libraries to preload")
+END_OPTIONS(Preload)
+