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<?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@hsxx.drive.ne.jp" /> </head> <body style="background-color: white"> <!-- INDEX BEGIN --> <div name="index"> <p><a name="__index__"></a></p> <ul> <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> <hr name="index" /> </div> <!-- INDEX END --> <p> </p> <hr /> <h1><a name="name">NAME</a></h1> <p>BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all - BIO allocation and freeing functions</p> <p> </p> <hr /> <h1><a name="synopsis">SYNOPSIS</a></h1> <pre> #include <openssl/bio.h></pre> <pre> 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);</pre> <p> </p> <hr /> <h1><a name="description">DESCRIPTION</a></h1> <p>The <code>BIO_new()</code> function returns a new BIO using method <strong>type</strong>.</p> <p><code>BIO_up_ref()</code> increments the reference count associated with the BIO object.</p> <p><code>BIO_free()</code> frees up a single BIO, <code>BIO_vfree()</code> also frees up a single BIO but it does not return a value. If <strong>a</strong> is NULL nothing is done. Calling <code>BIO_free()</code> 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><code>BIO_free_all()</code> frees up an entire BIO chain, it does not halt if an error occurs freeing up an individual BIO in the chain. If <strong>a</strong> is NULL nothing is done.</p> <p> </p> <hr /> <h1><a name="return_values">RETURN VALUES</a></h1> <p><code>BIO_new()</code> returns a newly created BIO or NULL if the call fails.</p> <p><code>BIO_up_ref()</code> and <code>BIO_free()</code> return 1 for success and 0 for failure.</p> <p><code>BIO_free_all()</code> and <code>BIO_vfree()</code> do not return values.</p> <p> </p> <hr /> <h1><a name="notes">NOTES</a></h1> <p>If <code>BIO_free()</code> is called on a BIO chain it will only free one BIO resulting in a memory leak.</p> <p>Calling <code>BIO_free_all()</code> on a single BIO has the same effect as calling <code>BIO_free()</code> on it other than the discarded return value.</p> <p> </p> <hr /> <h1><a name="history">HISTORY</a></h1> <p><code>BIO_set()</code> was removed in OpenSSL 1.1.0 as BIO type is now opaque.</p> <p> </p> <hr /> <h1><a name="examples">EXAMPLES</a></h1> <p>Create a memory BIO:</p> <pre> BIO *mem = BIO_new(BIO_s_mem());</pre> <p> </p> <hr /> <h1><a name="copyright">COPYRIGHT</a></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>