+#endif
+
+extern void privoxy_mutex_lock(privoxy_mutex_t *mutex);
+extern void privoxy_mutex_unlock(privoxy_mutex_t *mutex);
+
+extern privoxy_mutex_t log_mutex;
+extern privoxy_mutex_t log_init_mutex;
+extern privoxy_mutex_t connection_reuse_mutex;
+
+#ifdef FEATURE_EXTERNAL_FILTERS
+extern privoxy_mutex_t external_filter_mutex;
+#endif
+
+#ifdef FEATURE_CLIENT_TAGS
+extern privoxy_mutex_t client_tags_mutex;
+#endif
+
+#ifdef FEATURE_EXTENDED_STATISTICS
+extern privoxy_mutex_t filter_statistics_mutex;
+extern privoxy_mutex_t block_statistics_mutex;
+#endif
+
+#ifndef HAVE_GMTIME_R
+extern privoxy_mutex_t gmtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#ifndef HAVE_LOCALTIME_R
+extern privoxy_mutex_t localtime_mutex;
+#endif /* ndef HAVE_GMTIME_R */
+
+#if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
+extern privoxy_mutex_t resolver_mutex;
+#endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */