+/*
+ * Allocate a given CRYPTO_EX_DATA item using the class specific allocation
+ * function
+ */
+int CRYPTO_alloc_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad,
+ int idx)
+{
+ EX_CALLBACK *f;
+ EX_CALLBACKS *ip;
+ void *curval;
+
+ curval = CRYPTO_get_ex_data(ad, idx);
+
+ /* Already there, no need to allocate */
+ if (curval != NULL)
+ return 1;
+
+ ip = get_and_lock(class_index);
+ f = sk_EX_CALLBACK_value(ip->meth, idx);
+ CRYPTO_THREAD_unlock(ex_data_lock);
+
+ /*
+ * This should end up calling CRYPTO_set_ex_data(), which allocates
+ * everything necessary to support placing the new data in the right spot.
+ */
+ f->new_func(obj, curval, ad, idx, f->argl, f->argp);
+
+ return 1;
+}
+