Method Reload

Source/Engine/Scripting/Scripting.cpp:712–783

#if USE_EDITOR

void Scripting::Reload(bool canTriggerSceneReload)
{
    // By default we allow to call it only from the main thread and when no scene is loaded.
    // Otherwise call scene manager to perform clear scripts reload.
    // It will call this method back on main thread without scenes loaded, see SceneActionType::ReloadScripts.
    if (!IsInMainThread() || Level::IsAnySceneLoaded())
    {
        if (canTriggerSceneReload)
        {
            // Call scene to reload scripts
            Level::ReloadScriptsAsync();
        }
        else
        {
            LOG(Warning, "Cannot reload scene on scripting reload. Flag is not set.");
        }
        return;
    }

    PROFILE_CPU();

    // Ideally we would call Release and Load but this would also reload Editor objects which we want avoid
    // Editor is also referencing assets and other managed objects so we should force reload everything.
    // However Reload is called when no scene is loaded.

    // Faster path - if no game assembly loaded yet
    if (!_hasGameModulesLoaded)
    {
        // Just load missing assemblies
        Load();
        return;
    }

    LOG(Info, "Start user scripts reload");
    ScriptsReloading();

    // Destroy objects from game assemblies (eg. not released objects that might crash if persist in memory after reload)
    ReleaseObjects(true);

    // Unload all game modules
    LOG(Info, "Unloading game binary modules");
    auto modules = BinaryModule::GetModules();
    for (int32 i = modules.Count() - 1; i >= 0; i--)
    {
        BinaryModule* module = modules[i];
        if (module == GetBinaryModuleCorlib() || module == GetBinaryModuleFlaxEngine())
            continue;

        module->Destroy(true);
    }
    modules.Clear();
    _nonNativeModules.ClearDelete();
    _hasGameModulesLoaded = false;
    ManagedDictionary::CachedTypes.Clear();

    // Release and create a new assembly load context for user assemblies
    MCore::UnloadScriptingAssemblyLoadContext();
    MCore::CreateScriptingAssemblyLoadContext();