2 files changed, 54 insertions, 0 deletions
diff --git a/project2/basics/Jamfile.jam b/project2/basics/Jamfile.jam
index b276ba1..02de4c3 100644
--- a/project2/basics/Jamfile.jam
+++ b/project2/basics/Jamfile.jam
@@ -3,6 +3,7 @@ alias glibmm : : : :
 	<linkflags>"`pkg-config --libs glibmm-2.4`"
 	;
 lib boost_filesystem : : <name>boost_filesystem ;
+lib dl ;
 
 cpp-pch pch : pch.hpp :
 	<include>../../libmisc
@@ -16,6 +17,7 @@ lib p2basics :
 	<include>.
 	<include>../../libmisc
 	<library>glibmm
+	<library>dl
 	<library>boost_filesystem
 	<library>../common//p2common
 	;
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)
+