Struct PluginKeepalive 

pub struct PluginKeepalive { /* private fields */ }

Owns the loaded Library handles so the cdylibs stay mapped for as long as any registered tool/handler (whose fn pointers live inside the cdylib) may be called. Shared via Arc: every PluginToolAdapter (and, in B3, the ExtensionEmitter) holds a clone, so the libraries unload only when the last holder drops — which is never before the harness’s tool vec (and thus the last possible tool call) drops.

libloading::Library is Send + Sync (a handle/HMODULE), so the keepalive is too — required because AgentTool: Send + Sync and the adapter carries it.

Implementations

impl PluginKeepalive

pub fn new( libraries: Vec<Library>, action_bridge: Option<Arc<ActionBridge>>, ) -> Self

Build a keepalive. pub so tests + host code can construct an empty one (no loaded cdylibs) where the plugin lifecycle is exercised without real plugins.

pub fn empty() -> Arc<Self>

An empty keepalive owning no libraries — for host code that builds an adapter outside a real load session (notably in-process tests of the adapter against stub fns that live in the test binary, not a cdylib).