Function Java_sz_1orm_1java_SzOrmPool_ping 

#[unsafe(no_mangle)]
pub unsafe extern "system" fn Java_sz_1orm_1java_SzOrmPool_ping<'local>(
    unowned_env: EnvUnowned<'local>,
    _class: JClass<'local>,
    handle: jlong,
) -> jint

JNI entry: Health check (real acquire + ping)

Safety

SAFETY: handle must be a valid handle returned by poolNew, and not freed by poolFree.