1BIO_NEW(3)                          OpenSSL                         BIO_NEW(3)
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NAME

6       BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all - BIO allocation
7       and freeing functions
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SYNOPSIS

10        #include <openssl/bio.h>
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12        BIO *  BIO_new(const BIO_METHOD *type);
13        int    BIO_up_ref(BIO *a);
14        int    BIO_free(BIO *a);
15        void   BIO_vfree(BIO *a);
16        void   BIO_free_all(BIO *a);
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DESCRIPTION

19       The BIO_new() function returns a new BIO using method type.
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21       BIO_up_ref() increments the reference count associated with the BIO
22       object.
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24       BIO_free() frees up a single BIO, BIO_vfree() also frees up a single
25       BIO but it does not return a value.  If a is NULL nothing is done.
26       Calling BIO_free() may also have some effect on the underlying I/O
27       structure, for example it may close the file being referred to under
28       certain circumstances. For more details see the individual BIO_METHOD
29       descriptions.
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31       BIO_free_all() frees up an entire BIO chain, it does not halt if an
32       error occurs freeing up an individual BIO in the chain.  If a is NULL
33       nothing is done.
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RETURN VALUES

36       BIO_new() returns a newly created BIO or NULL if the call fails.
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38       BIO_up_ref() and BIO_free() return 1 for success and 0 for failure.
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40       BIO_free_all() and BIO_vfree() do not return values.
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NOTES

43       If BIO_free() is called on a BIO chain it will only free one BIO
44       resulting in a memory leak.
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46       Calling BIO_free_all() on a single BIO has the same effect as calling
47       BIO_free() on it other than the discarded return value.
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HISTORY

50       BIO_set() was removed in OpenSSL 1.1.0 as BIO type is now opaque.
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EXAMPLES

53       Create a memory BIO:
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55        BIO *mem = BIO_new(BIO_s_mem());
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58       Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.
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60       Licensed under the OpenSSL license (the "License").  You may not use
61       this file except in compliance with the License.  You can obtain a copy
62       in the file LICENSE in the source distribution or at
63       <https://www.openssl.org/source/license.html>.
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671.1.1g                            2020-04-23                        BIO_NEW(3)
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