+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+static void
+run_once(volatile int * once, void (*init)(void))
+{
+int wlock = 0;
+
+CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
+if (!*once)
+ {
+ CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+ CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
+ wlock = 1;
+ if (!*once)
+ {
+ *once = 1;
+ init();
+ }
+ }
+if (wlock)
+ CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
+else
+ CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
+}
+#endif
+
+