BIO_new(3) OpenSSL BIO_new(3)
NAME
BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all - BIO allocation
and freeing functions
SYNOPSIS
#include <openssl/bio.h>
BIO * BIO_new(const BIO_METHOD *type);
int BIO_up_ref(BIO *a);
int BIO_free(BIO *a);
void BIO_vfree(BIO *a);
void BIO_free_all(BIO *a);
DESCRIPTION
The BIO_new() function returns a new BIO using method type.
BIO_up_ref() increments the reference count associated with the BIO
object.
BIO_free() frees up a single BIO, BIO_vfree() also frees up a single
BIO but it does not return a value. If a is NULL nothing is done.
Calling BIO_free() may also have some effect on the underlying I/O
structure, for example it may close the file being referred to under
certain circumstances. For more details see the individual BIO_METHOD
descriptions.
BIO_free_all() frees up an entire BIO chain, it does not halt if an
error occurs freeing up an individual BIO in the chain. If a is NULL
nothing is done.
RETURN VALUES
BIO_new() returns a newly created BIO or NULL if the call fails.
BIO_up_ref() and BIO_free() return 1 for success and 0 for failure.
BIO_free_all() and BIO_vfree() do not return values.
NOTES
If BIO_free() is called on a BIO chain it will only free one BIO
resulting in a memory leak.
Calling BIO_free_all() on a single BIO has the same effect as calling
BIO_free() on it other than the discarded return value.
HISTORY
BIO_set() was removed in OpenSSL 1.1.0 as BIO type is now opaque.
EXAMPLES
Create a memory BIO:
BIO *mem = BIO_new(BIO_s_mem());
COPYRIGHT
Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
1.1.1d 2019-09-10 BIO_new(3)
openssl 1.1.1d - Generated Wed Sep 18 18:19:48 CDT 2019