Reorganizing the code

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

src/util/plugin_manager.h

@@ -0,0 +1,66 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    plugin_manager.h
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2007-09-18.
+
+Revision History:
+
+--*/
+#ifndef _PLUGIN_MANAGER_H_
+#define _PLUGIN_MANAGER_H_
+
+#include"util.h"
+
+template<typename Plugin>
+class plugin_manager {
+    ptr_vector<Plugin>   m_fid2plugins;
+    ptr_vector<Plugin>   m_plugins;
+public:
+    ~plugin_manager() {
+        std::for_each(m_plugins.begin(), m_plugins.end(), delete_proc<Plugin>());
+    }
+
+    /**
+       \brief Release ownership of the plugins.
+    */
+    void release() {
+        m_fid2plugins.reset();
+        m_plugins.reset();
+    }
+    
+    void register_plugin(Plugin * p) {
+        SASSERT(p);
+        family_id fid = p->get_family_id();
+        SASSERT(m_fid2plugins.get(fid, 0) == 0);
+        m_fid2plugins.setx(fid, p, 0);
+        m_plugins.push_back(p);
+    }
+    
+    Plugin * get_plugin(family_id fid) const {
+        if (fid == null_family_id) {
+            return 0;
+        }
+        return m_fid2plugins.get(fid, 0);
+    }
+
+    typename ptr_vector<Plugin>::const_iterator begin() const { 
+        return m_plugins.begin(); 
+    }
+
+    typename ptr_vector<Plugin>::const_iterator end() const { 
+        return m_plugins.end(); 
+    }
+};
+
+#endif /* _PLUGIN_MANAGER_H_ */
+