void capng_restore_state(void **state);
capng_restore_state is a function that takes the state information previously saved by capng_save_state and restores the libraries internal state. This function is not available in the python bindings.
capng_restore_state free's the previously malloc'd state, thus the state can't be restored multiple times.
The working pid is part of the restored state, if restoring the state to a different thread, capng_setpid can be used to update it.