- int i, c = CRYPTO_num_locks();
-
- http_openssl_tsl = malloc(c * sizeof(MUTEX_T));
-
- for (i = 0; i < c; ++i) {
- http_openssl_tsl[i] = tsrm_mutex_alloc();
+ /* mod_ssl, libpq or ext/curl might already have set thread lock callbacks */
+ if (!CRYPTO_get_id_callback()) {
+ int i, c = CRYPTO_num_locks();
+
+ http_openssl_tsl = malloc(c * sizeof(MUTEX_T));
+
+ for (i = 0; i < c; ++i) {
+ http_openssl_tsl[i] = tsrm_mutex_alloc();
+ }
+
+ CRYPTO_set_id_callback(http_openssl_thread_id);
+ CRYPTO_set_locking_callback(http_openssl_thread_lock);