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example/shared_library_load_plugin.cpp

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+// Copyright 2011-2012 Renato Tegon Forti
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// For more information, see http://www.boost.org
+
+// -----------------------------------------------------------------------------
+// This example shows how to use shared_library class to load a plugin of a DSO.
+// -----------------------------------------------------------------------------
+
+#define BOOST_ALL_DYN_LINK
+#define BOOST_LIB_DIAGNOSTIC
+
+#include <iostream>
+#include <boost/filesystem.hpp>
+namespace fs = ::boost::filesystem;
+fs::path get_shared_lib(const fs::path& root, const std::wstring& filename_part) {  
+    fs::directory_iterator it(root);
+    fs::directory_iterator endit;
+
+    while (it != endit) {
+        if (fs::is_regular_file(*it) && it->path().filename().wstring().find(filename_part) != std::wstring::npos) {
+            return *it;
+        }
+        ++it;
+    }
+
+    throw std::runtime_error("Failed to find library");
+}
+
+//[callplugcpp
+#include <boost/plugin/shared_library.hpp>
+#include "plugin_api.hpp"
+
+using namespace boost;
+
+typedef my_plugin_api* (pluginapi_create) (void);
+typedef void (pluginapi_delete) (my_plugin_api* myplugin);
+
+int main(int argc, char* argv[])
+{ 
+    // argv[1] must contain plugin path
+    BOOST_ASSERT(argc >= 2);
+    boost::filesystem::path shared_library_path = get_shared_lib(argv[1], L"plugin_library");
+
+    application::shared_library sl(shared_library_path);
+
+    if (!sl.search_symbol("create_my_plugin")) {
+        return 2;
+    }
+
+    my_plugin_api* plugin = (sl.get<pluginapi_create>("create_my_plugin"))();
+
+    if (plugin == NULL) {
+        return 3;
+    }
+
+    std::cout << "Plugin Version: " << plugin->version() << std::endl;
+    std::cout << "Plugin Method:  " << plugin->calculate(1.5, 1.5) << std::endl;
+
+    (sl.get<pluginapi_delete>("delete_my_plugin"))(plugin);
+    return 0;
+}
+//]