-/* What an "implementation of ex_data functionality" looks like */
-struct st_CRYPTO_EX_DATA_IMPL {
- /*********************/
- /* GLOBAL OPERATIONS */
- /* Return a new class index */
- int (*cb_new_class) (void);
- /* Cleanup all state used by the implementation */
- void (*cb_cleanup) (void);
- /************************/
- /* PER-CLASS OPERATIONS */
- /* Get a new method index within a class */
- int (*cb_get_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 a new CRYPTO_EX_DATA of a given class */
- int (*cb_new_ex_data) (int class_index, void *obj, CRYPTO_EX_DATA *ad);
- /* Duplicate a CRYPTO_EX_DATA of a given class onto a copy */
- int (*cb_dup_ex_data) (int class_index, CRYPTO_EX_DATA *to,
- CRYPTO_EX_DATA *from);
- /* Cleanup a CRYPTO_EX_DATA of a given class */
- void (*cb_free_ex_data) (int class_index, void *obj, CRYPTO_EX_DATA *ad);
-};
-
-/* The implementation we use at run-time */
-static const CRYPTO_EX_DATA_IMPL *impl = NULL;
-
-/*
- * To call "impl" functions, use this macro rather than referring to 'impl'
- * directly, eg. EX_IMPL(get_new_index)(...);
- */
-#define EX_IMPL(a) impl->cb_##a
-
-/* Predeclare the "default" ex_data implementation */
-static int int_new_class(void);
-static void int_cleanup(void);
-static int int_get_new_index(int class_index, long argl, void *argp,
- CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
- CRYPTO_EX_free *free_func);
-static int int_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
-static int int_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
- CRYPTO_EX_DATA *from);
-static void int_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
-static CRYPTO_EX_DATA_IMPL impl_default = {
- int_new_class,
- int_cleanup,
- int_get_new_index,
- int_new_ex_data,
- int_dup_ex_data,
- int_free_ex_data
-};
-
-/*
- * Internal function that checks whether "impl" is set and if not, sets it to
- * the default.
- */
-static void impl_check(void)
-{
- CRYPTO_w_lock(CRYPTO_LOCK_EX_DATA);
- if (!impl)
- impl = &impl_default;
- CRYPTO_w_unlock(CRYPTO_LOCK_EX_DATA);
-}
-
-/*
- * A macro wrapper for impl_check that first uses a non-locked test before
- * invoking the function (which checks again inside a lock).
- */
-#define IMPL_CHECK if(!impl) impl_check();