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BIO_vfree.html
<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>BIO_new</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#HISTORY">HISTORY</a></li> <li><a href="#EXAMPLES">EXAMPLES</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all - BIO allocation and freeing functions</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #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);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>The BIO_new() function returns a new BIO using method <b>type</b>.</p> <p>BIO_up_ref() increments the reference count associated with the BIO object.</p> <p>BIO_free() frees up a single BIO, BIO_vfree() also frees up a single BIO but it does not return a value. If <b>a</b> 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.</p> <p>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 <b>a</b> is NULL nothing is done.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>BIO_new() returns a newly created BIO or NULL if the call fails.</p> <p>BIO_up_ref() and BIO_free() return 1 for success and 0 for failure.</p> <p>BIO_free_all() and BIO_vfree() do not return values.</p> <h1 id="NOTES">NOTES</h1> <p>If BIO_free() is called on a BIO chain it will only free one BIO resulting in a memory leak.</p> <p>Calling BIO_free_all() on a single BIO has the same effect as calling BIO_free() on it other than the discarded return value.</p> <h1 id="HISTORY">HISTORY</h1> <p>BIO_set() was removed in OpenSSL 1.1.0 as BIO type is now opaque.</p> <h1 id="EXAMPLES">EXAMPLES</h1> <p>Create a memory BIO:</p> <pre><code> BIO *mem = BIO_new(BIO_s_mem());</code></pre> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2000-2019 The OpenSSL Project Authors. All Rights Reserved.</p> <p>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 <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>
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