Module callback 

callback — Named callback registry

Provides a thread-safe, global registry of named callbacks. Callbacks can be registered either from Rust (typed closure) or from the C/Go side via ffi_register_callback (C function pointer).

Design

The registry is a Mutex<HashMap<String, CallbackFn>> initialized lazily via once_cell. All exported functions are panic-safe via catch_panic.

Thread safety

The registry is protected by a std::sync::Mutex. If a thread panics while holding the lock, the lock becomes poisoned and all subsequent operations return FfiError::LockPoisoned.

Functions

callback_count

Return the number of currently registered callbacks.

ffi_callback_count

Return the number of registered callbacks.

ffi_invoke_callback^⚠

Invoke a registered callback by name.

ffi_register_callback^⚠

Register a C function pointer as a named callback.

ffi_unregister_callback^⚠

Remove a registered callback by name.

register_callback

Register a named callback from Rust code.

unregister_callback

Remove a callback by name from Rust code.