SCM
scm_current_warning_port (void)
{
- static SCM cwp_var = SCM_BOOL_F;
-
- if (scm_is_false (cwp_var))
- cwp_var = scm_c_private_lookup ("guile", "current-warning-port");
+ static SCM cwp_var = SCM_UNDEFINED;
+ static scm_i_pthread_mutex_t cwp_var_mutex
+ = SCM_I_PTHREAD_MUTEX_INITIALIZER;
+
+ scm_i_scm_pthread_mutex_lock (&cwp_var_mutex);
+ if (SCM_UNBNDP (cwp_var))
+ cwp_var = scm_c_private_variable ("guile", "current-warning-port");
+ scm_i_pthread_mutex_unlock (&cwp_var_mutex);
return scm_call_0 (scm_variable_ref (cwp_var));
}