Corrade::PluginManager::AbstractManager class

Non-templated base for plugin managers.

See Manager and Plugin management for more information.

Derived classes

template<class T>
class Manager
Plugin manager.

Public static variables

static const int Version
Plugin version.

Constructors, destructors, conversion operators

AbstractManager(const AbstractManager&) deleted
Copying is not allowed.
AbstractManager(AbstractManager&&) deleted
Moving is not allowed.
~AbstractManager() protected
Destructor.

Public functions

auto operator=(const AbstractManager&) -> AbstractManager& deleted
Copying is not allowed.
auto operator=(AbstractManager&&) -> AbstractManager& deleted
Moving is not allowed.
auto pluginInterface() const -> std::string
Plugin interface.
auto pluginDirectory() const -> std::string
Plugin directory.
void setPluginDirectory(std::string directory)
Set another plugin directory.
void reloadPluginDirectory()
Reload plugin directory.
void setPreferredPlugins(const std::string& alias, std::initializer_list<std::string> plugins)
Set preferred plugins for given alias.
auto pluginList() const -> std::vector<std::string>
List of all available plugin names.
auto aliasList() const -> std::vector<std::string>
List of all available alias names.
auto metadata(const std::string& plugin) -> PluginMetadata*
Plugin metadata.
auto metadata(const std::string& plugin) const -> const PluginMetadata*
auto loadState(const std::string& plugin) const -> LoadState
Load state of a plugin.
auto load(const std::string& plugin) -> LoadState
Load a plugin.
auto unload(const std::string& plugin) -> LoadState
Unload a plugin.

Function documentation

Corrade::PluginManager::AbstractManager::~AbstractManager() protected

Destructor.

Destroys all plugin instances and unloads all plugins.

std::string Corrade::PluginManager::AbstractManager::pluginInterface() const

Plugin interface.

Only plugins with the same plugin interface string can be used in this plugin manager.

std::string Corrade::PluginManager::AbstractManager::pluginDirectory() const

Plugin directory.

void Corrade::PluginManager::AbstractManager::setPluginDirectory(std::string directory)

Set another plugin directory.

Keeps loaded plugins untouched, removes unloaded plugins which are not existing anymore and adds newly found plugins. The directory is expected to be in UTF-8.

void Corrade::PluginManager::AbstractManager::reloadPluginDirectory()

Reload plugin directory.

Convenience equivalent to setPluginDirectory(pluginDirectory()).

void Corrade::PluginManager::AbstractManager::setPreferredPlugins(const std::string& alias, std::initializer_list<std::string> plugins)

Set preferred plugins for given alias.

By default, if more than one plugin provides given alias, one of them is arbitrarily chosen. With this function it's possible to control the behavior. For given alias the function goes through the list in plugins and uses the first plugin that is available. The alias is expected to exist and be defined by plugins in plugins. If none of plugins is available, nothing is done.

Note that after calling setPluginDirectory() or reloadPluginDirectory() this preference gets reset and you may need to call this function again.

std::vector<std::string> Corrade::PluginManager::AbstractManager::pluginList() const

List of all available plugin names.

Returns a list of names that correspond to concrete unique static or dynamic plugins.

std::vector<std::string> Corrade::PluginManager::AbstractManager::aliasList() const

List of all available alias names.

In addition to everything returned by pluginList() contains also all plugin aliases.

PluginMetadata* Corrade::PluginManager::AbstractManager::metadata(const std::string& plugin)

Plugin metadata.

Returns pointer to plugin metadata or nullptr, if given plugin is not found.

const PluginMetadata* Corrade::PluginManager::AbstractManager::metadata(const std::string& plugin) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

LoadState Corrade::PluginManager::AbstractManager::loadState(const std::string& plugin) const

Load state of a plugin.

Returns LoadState::Loaded if the plugin is loaded or LoadState::NotLoaded if not. For static plugins returns always LoadState::Static. On failure returns LoadState::NotFound or LoadState::WrongMetadataFile.

LoadState Corrade::PluginManager::AbstractManager::load(const std::string& plugin)

Load a plugin.

Returns LoadState::Loaded if the plugin is already loaded or if loading succeeded. For static plugins returns always LoadState::Static. On failure returns LoadState::NotFound, LoadState::WrongPluginVersion, LoadState::WrongInterfaceVersion, LoadState::UnresolvedDependency or LoadState::LoadFailed.

If the plugin has any dependencies, they are recursively processed before loading given plugin.

If plugin is a plugin file path (i.e., ending with a platform-specific extension such as .so or .dll), it's loaded from given location and, if the loading succeeds, its basename (without extension) is exposed as an available plugin name. It's expected that a plugin with the same name is not already loaded. The plugin will reside in the plugin list as long as it's loaded or, after calling unload() on it, until next call to setPluginDirectory() or reloadPluginDirectory().

LoadState Corrade::PluginManager::AbstractManager::unload(const std::string& plugin)

Unload a plugin.

Returns LoadState::NotLoaded if the plugin is not loaded or unloading succeeded. For static plugins always returns LoadState::Static. On failure returns LoadState::NotFound, LoadState::UnloadFailed, LoadState::Required or LoadState::Used.