From 87a90d56403667f873f9d9c2f278fb6e35cffe51 Mon Sep 17 00:00:00 2001
From: randomdan <randomdan@localhost>
Date: Tue, 15 Mar 2011 01:03:52 +0000
Subject: Add element handler for loading extra libraries at runtime

---
 project2/Jamfile.jam         |  5 +++++
 project2/xmlObjectLoader.cpp | 25 +++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/project2/Jamfile.jam b/project2/Jamfile.jam
index 575d4f9..24fa691 100644
--- a/project2/Jamfile.jam
+++ b/project2/Jamfile.jam
@@ -13,6 +13,7 @@ alias libxslt : : : :
 	<cflags>"`pkg-config --cflags libexslt`"
 	<linkflags>"`pkg-config --libs libexslt`" ;
 
+lib dl : : <name>dl ;
 lib fcgi : : <name>fcgi ;
 lib fcgi++ : : <name>fcgi++ ;
 lib boost_regex : : <name>boost_regex ;
@@ -63,10 +64,14 @@ lib p2common :
 	:
 	<include>../libmisc
 	<library>libxmlpp
+	<library>dl
 	<library>boost_system
 	<library>boost_filesystem
 	<library>boost_date_time
 	<library>boost_program_options
+	: :
+	<include>.
+	<include>../libmisc
 	;
 
 lib p2xml :
diff --git a/project2/xmlObjectLoader.cpp b/project2/xmlObjectLoader.cpp
index e16c9e1..849cfa1 100644
--- a/project2/xmlObjectLoader.cpp
+++ b/project2/xmlObjectLoader.cpp
@@ -4,6 +4,7 @@
 #include "logger.h"
 #include <boost/shared_ptr.hpp>
 #include <boost/foreach.hpp>
+#include <dlfcn.h>
 #include <libxml++/nodes/textnode.h>
 
 unsigned int LoaderBase::depth = 0;
@@ -17,10 +18,34 @@ objLoaders()
 	return _objLoaders;
 }
 
+SimpleMessageException(LoadLibraryFailed);
+
+class Library : public SourceObject {
+	public:
+		Library(const xmlpp::Element * p) :
+			SourceObject(p),
+			handle(dlopen(p->get_attribute_value("path").c_str(), RTLD_NOW))
+		{
+			if (!handle) {
+				throw LoadLibraryFailed(dlerror());
+			}
+		}
+		~Library() {
+			dlclose(handle);
+		}
+		void loadComplete(const CommonObjects*) {
+		}
+	private:
+		void * handle;
+};
+Storage<Library>::Objects libraries;
+DECLARE_LOADER("library", Library);
+
 LoaderBase::LoaderBase(const Glib::ustring & n, bool r) :
 	recursive(r),
 	ns(n)
 {
+	supportedStorers.insert(Storer::into(&libraries));
 }
 
 LoaderBase::~LoaderBase()
-- 
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