Add a new system runtime plugin type - just the top level

class, not any actual plugin implementation yet.
<rdar://problem/15314068> 

llvm-svn: 194044

lldb/source/Core/PluginManager.cpp

@@ -854,6 +854,111 @@ PluginManager::GetLanguageRuntimeCreateCallbackForPluginName (const ConstString
     return NULL;
 }
 
+#pragma mark SystemRuntime
+
+
+struct SystemRuntimeInstance
+{
+    SystemRuntimeInstance() :
+        name(),
+        description(),
+        create_callback(NULL)
+    {
+    }
+
+    ConstString name;
+    std::string description;
+    SystemRuntimeCreateInstance create_callback;
+};
+
+typedef std::vector<SystemRuntimeInstance> SystemRuntimeInstances;
+
+static Mutex &
+GetSystemRuntimeMutex ()
+{
+    static Mutex g_instances_mutex (Mutex::eMutexTypeRecursive);
+    return g_instances_mutex;
+}
+
+static SystemRuntimeInstances &
+GetSystemRuntimeInstances ()
+{
+    static SystemRuntimeInstances g_instances;
+    return g_instances;
+}
+
+bool
+PluginManager::RegisterPlugin
+(
+    const ConstString &name,
+    const char *description,
+    SystemRuntimeCreateInstance create_callback
+)
+{
+    if (create_callback)
+    {
+        SystemRuntimeInstance instance;
+        assert ((bool)name);
+        instance.name = name;
+        if (description && description[0])
+            instance.description = description;
+        instance.create_callback = create_callback;
+        Mutex::Locker locker (GetSystemRuntimeMutex ());
+        GetSystemRuntimeInstances ().push_back (instance);
+    }
+    return false;
+}
+
+bool
+PluginManager::UnregisterPlugin (SystemRuntimeCreateInstance create_callback)
+{
+    if (create_callback)
+    {
+        Mutex::Locker locker (GetSystemRuntimeMutex ());
+        SystemRuntimeInstances &instances = GetSystemRuntimeInstances ();
+        
+        SystemRuntimeInstances::iterator pos, end = instances.end();
+        for (pos = instances.begin(); pos != end; ++ pos)
+        {
+            if (pos->create_callback == create_callback)
+            {
+                instances.erase(pos);
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+SystemRuntimeCreateInstance
+PluginManager::GetSystemRuntimeCreateCallbackAtIndex (uint32_t idx)
+{
+    Mutex::Locker locker (GetSystemRuntimeMutex ());
+    SystemRuntimeInstances &instances = GetSystemRuntimeInstances ();
+    if (idx < instances.size())
+        return instances[idx].create_callback;
+    return NULL;
+}
+
+SystemRuntimeCreateInstance
+PluginManager::GetSystemRuntimeCreateCallbackForPluginName (const ConstString &name)
+{
+    if (name)
+    {
+        Mutex::Locker locker (GetSystemRuntimeMutex ());
+        SystemRuntimeInstances &instances = GetSystemRuntimeInstances ();
+        
+        SystemRuntimeInstances::iterator pos, end = instances.end();
+        for (pos = instances.begin(); pos != end; ++ pos)
+        {
+            if (name == pos->name)
+                return pos->create_callback;
+        }
+    }
+    return NULL;
+}
+
+
 #pragma mark ObjectFile
 
 struct ObjectFileInstance