5 BIO_new, BIO_set, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all - BIO allocation and freeing functions
9 #include <openssl/bio.h>
11 BIO * BIO_new(const BIO_METHOD *type);
12 int BIO_set(BIO *a, const BIO_METHOD *type);
13 int BIO_up_ref(BIO *a);
15 void BIO_vfree(BIO *a);
16 void BIO_free_all(BIO *a);
20 The BIO_new() function returns a new BIO using method B<type>.
22 BIO_set() sets the method of an already existing BIO.
24 BIO_up_ref() increments the reference count associated with the BIO object.
26 BIO_free() frees up a single BIO, BIO_vfree() also frees up a single BIO
27 but it does not return a value.
28 If B<a> is NULL nothing is done.
29 Calling BIO_free() may also have some effect
30 on the underlying I/O structure, for example it may close the file being
31 referred to under certain circumstances. For more details see the individual
32 BIO_METHOD descriptions.
34 BIO_free_all() frees up an entire BIO chain, it does not halt if an error
35 occurs freeing up an individual BIO in the chain.
36 If B<a> is NULL nothing is done.
40 BIO_new() returns a newly created BIO or NULL if the call fails.
42 BIO_set(), BIO_up_ref() and BIO_free() return 1 for success and 0 for failure.
44 BIO_free_all() and BIO_vfree() do not return values.
48 If BIO_free() is called on a BIO chain it will only free one BIO resulting
51 Calling BIO_free_all() on a single BIO has the same effect as calling BIO_free()
52 on it other than the discarded return value.
58 BIO *mem = BIO_new(BIO_s_mem());
62 Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
64 Licensed under the OpenSSL license (the "License"). You may not use
65 this file except in compliance with the License. You can obtain a copy
66 in the file LICENSE in the source distribution or at
67 L<https://www.openssl.org/source/license.html>.