Struct Callback 

pub struct Callback {
    pub reason: CbReason,
    pub cb_rtn: Option<unsafe extern "C" fn(*mut t_cb_data) -> i32>,
    pub obj: Option<Handle>,
    pub time: Option<Time>,
    pub value: Option<Value>,
    pub user_data: Option<*mut i8>,
}

Raw callback registration descriptor.

This mirrors the fields used by vpi_register_cb and is useful when constructing callback registrations manually.

Fields

reason: CbReason

Event reason that triggers the callback.

cb_rtn: Option<unsafe extern "C" fn(*mut t_cb_data) -> i32>

Native callback function pointer.

obj: Option<Handle>

Optional object associated with the callback.

time: Option<Time>

Optional simulation time for time-based callbacks.

value: Option<Value>

Optional value payload used by value-based callbacks.

user_data: Option<*mut i8>

Optional user data pointer passed back by the simulator.