libpq: Report strerror on pthread_mutex_lock() failure

diff --git a/src/interfaces/libpq/fe-secure.c b/src/interfaces/libpq/fe-secure.c
index b16968b049fe7460df08f8cf1bfd8b50fc946750..3bd01131c63eab70de89bc33fefb8d1737147cf4 100644 (file)
--- a/src/interfaces/libpq/fe-secure.c
+++ b/src/interfaces/libpq/fe-secure.c
@@ -256,14 +256,18 @@ pqsecure_open_client(PGconn *conn)
        /* First time through? */
        if (conn->ssl == NULL)
        {
+#ifdef ENABLE_THREAD_SAFETY
+               int rc;
+#endif
+
                /* We cannot use MSG_NOSIGNAL to block SIGPIPE when using SSL */
                conn->sigpipe_flag = false;
 
 #ifdef ENABLE_THREAD_SAFETY
-               if (pthread_mutex_lock(&ssl_config_mutex))
+               if ((rc = pthread_mutex_lock(&ssl_config_mutex)))
                {
                        printfPQExpBuffer(&conn->errorMessage,
-                                  libpq_gettext("unable to acquire mutex\n"));
+                                                         libpq_gettext("could not acquire mutex: %s\n"), strerror(rc));
                        return PGRES_POLLING_FAILED;
                }
 #endif
@@ -1115,10 +1119,12 @@ initialize_SSL(PGconn *conn)
                 * SSL_context struct.
                 */
 #ifdef ENABLE_THREAD_SAFETY
-               if (pthread_mutex_lock(&ssl_config_mutex))
+               int rc;
+
+               if ((rc = pthread_mutex_lock(&ssl_config_mutex)))
                {
                        printfPQExpBuffer(&conn->errorMessage,
-                                  libpq_gettext("unable to acquire mutex\n"));
+                                                         libpq_gettext("could not acquire mutex: %s\n"), strerror(rc));
                        return -1;
                }
 #endif
@@ -1333,10 +1339,12 @@ initialize_SSL(PGconn *conn)
                X509_STORE *cvstore;
 
 #ifdef ENABLE_THREAD_SAFETY
-               if (pthread_mutex_lock(&ssl_config_mutex))
+               int rc;
+
+               if ((rc = pthread_mutex_lock(&ssl_config_mutex)))
                {
                        printfPQExpBuffer(&conn->errorMessage,
-                                  libpq_gettext("unable to acquire mutex\n"));
+                                                         libpq_gettext("could not acquire mutex: %s\n"), strerror(rc));
                        return -1;
                }
 #endif