Function init

src/common/ceph_crypto.cc:99–130

#endif /* not OPENSSL_VERSION_NUMBER < 0x10100000L */

static void init() {
#if OPENSSL_VERSION_NUMBER < 0x10100000L
  if (++crypto_refs == 1) {
    // according to
    // https://wiki.openssl.org/index.php/Library_Initialization#libcrypto_Initialization
    OpenSSL_add_all_algorithms();
    ERR_load_crypto_strings();

    // initialize locking callbacks, needed for thread safety.
    // http://www.openssl.org/support/faq.html#PROG1
    CRYPTO_set_locking_callback(&ssl_locking_callback);
    CRYPTO_set_id_callback(&ssl_get_thread_id);

    OPENSSL_config(nullptr);
  }

  // we need to record IDs of all threads calling the initialization in
  // order to *manually* free per-thread memory OpenSSL *automagically*
  // allocated in ERR_get_state().
  // XXX: this solution/nasty hack is IMPERFECT. A leak will appear when
  // a client init()ializes the crypto subsystem with one thread and then
  // uses it from another one in a way that results in ERR_get_state().
  // XXX: for discussion about another approaches please refer to:
  // https://www.mail-archive.com/openssl-users@openssl.org/msg59070.html
  {
    std::lock_guard l(init_records.lock);
    CRYPTO_THREADID tmp;
    CRYPTO_THREADID_current(&tmp);
    init_records.tids.emplace_back(std::move(tmp));
  }
#endif /* OPENSSL_VERSION_NUMBER < 0x10100000L */
}

static void shutdown() {
#if OPENSSL_VERSION_NUMBER < 0x10100000L