-int CRYPTO_get_ex_new_index(int idx,STACK **sk,long argl,char *argp,
- int (*new_func)(),int (*dup_func)(),void (*free_func)());
-int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad,int idx,char *val);
-char *CRYPTO_get_ex_data(CRYPTO_EX_DATA *ad,int idx);
-int CRYPTO_dup_ex_data(STACK *meth,CRYPTO_EX_DATA *from,CRYPTO_EX_DATA *to);
-void CRYPTO_free_ex_data(STACK *meth,char *obj,CRYPTO_EX_DATA *ad);
-void CRYPTO_new_ex_data(STACK *meth, char *obj, CRYPTO_EX_DATA *ad);
+int OPENSSL_issetugid(void);
+
+/* An opaque type representing an implementation of "ex_data" support */
+typedef struct st_CRYPTO_EX_DATA_IMPL CRYPTO_EX_DATA_IMPL;
+/* Return an opaque pointer to the current "ex_data" implementation */
+const CRYPTO_EX_DATA_IMPL *CRYPTO_get_ex_data_implementation(void);
+/* Sets the "ex_data" implementation to be used (if it's not too late) */
+int CRYPTO_set_ex_data_implementation(const CRYPTO_EX_DATA_IMPL *i);
+/* Get a new "ex_data" class, and return the corresponding "class_index" */
+int CRYPTO_ex_data_new_class(void);
+/* Within a given class, get/register a new index */
+int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
+ CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
+ CRYPTO_EX_free *free_func);
+/* Initialise/duplicate/free CRYPTO_EX_DATA variables corresponding to a given
+ * class (invokes whatever per-class callbacks are applicable) */
+int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
+int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
+ CRYPTO_EX_DATA *from);
+void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
+/* Get/set data in a CRYPTO_EX_DATA variable corresponding to a particular index
+ * (relative to the class type involved) */
+int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val);
+void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad,int idx);
+/* This function cleans up all "ex_data" state. It mustn't be called under
+ * potential race-conditions. */
+void CRYPTO_cleanup_all_ex_data(void);