+{
+ int i;
+
+ if (a == NULL)
+ return 0;
+
+ if (CRYPTO_atomic_add(&a->references, -1, &i, a->lock) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("BIO", a);
+ if (i > 0)
+ return 1;
+ REF_ASSERT_ISNT(i < 0);
+ if ((a->callback != NULL) &&
+ ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
+ return i;
+
+ CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
+
+ CRYPTO_THREAD_lock_free(a->lock);
+
+ if ((a->method != NULL) && (a->method->destroy != NULL))
+ a->method->destroy(a);
+
+ OPENSSL_free(a);
+
+ return 1;
+}
+
+void BIO_set_data(BIO *a, void *ptr)
+{
+ a->ptr = ptr;
+}
+
+void *BIO_get_data(BIO *a)
+{
+ return a->ptr;
+}
+
+void BIO_set_init(BIO *a, int init)
+{
+ a->init = init;
+}
+
+int BIO_get_init(BIO *a)
+{
+ return a->init;
+}
+
+void BIO_set_shutdown(BIO *a, int shut)
+{
+ a->shutdown = shut;
+}
+
+int BIO_get_shutdown(BIO *a)
+{
+ return a->shutdown;
+}
+
+void BIO_vfree(BIO *a)
+{
+ BIO_free(a);
+}
+
+int BIO_up_ref(BIO *a)
+{
+ int i;
+
+ if (CRYPTO_atomic_add(&a->references, 1, &i, a->lock) <= 0)
+ return 0;
+
+ REF_PRINT_COUNT("BIO", a);
+ REF_ASSERT_ISNT(i < 2);
+ return ((i > 1) ? 1 : 0);
+}
+
+void BIO_clear_flags(BIO *b, int flags)
+{
+ b->flags &= ~flags;
+}
+
+int BIO_test_flags(const BIO *b, int flags)
+{
+ return (b->flags & flags);
+}
+
+void BIO_set_flags(BIO *b, int flags)
+{
+ b->flags |= flags;
+}
+
+long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
+ int, long, long) {
+ return b->callback;
+}
+
+void BIO_set_callback(BIO *b,
+ long (*cb) (struct bio_st *, int, const char *, int,
+ long, long))
+{
+ b->callback = cb;
+}
+
+void BIO_set_callback_arg(BIO *b, char *arg)
+{
+ b->cb_arg = arg;
+}
+
+char *BIO_get_callback_arg(const BIO *b)
+{
+ return b->cb_arg;
+}
+
+const char *BIO_method_name(const BIO *b)
+{
+ return b->method->name;
+}
+
+int BIO_method_type(const BIO *b)
+{
+ return b->method->type;
+}