pub unsafe extern "C" fn pa_context_set_event_callback(
p: *mut pa_context,
cb: pa_context_event_cb_t,
userdata: *mut c_void,
)pub unsafe extern "C" fn pa_context_set_event_callback(
p: *mut pa_context,
cb: pa_context_event_cb_t,
userdata: *mut c_void,
)