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Edit File : BIO_free.3 \| Size : 6.17 KB
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \(-- will .\" give an unbreakable dash, \(PI will give pi, \(L" will give a left .\" double quote, and \(R" will give a right double quote. \(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all \&\- BIO allocation and freeing functions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The \fBBIO_new()\fR function returns a new \s-1BIO\s0 using method \fBtype\fR. .PP \&\fBBIO_up_ref()\fR increments the reference count associated with the \s-1BIO\s0 object. .PP \&\fBBIO_free()\fR frees up a single \s-1BIO,\s0 \fBBIO_vfree()\fR also frees up a single \s-1BIO\s0 but it does not return a value. If \fBa\fR is \s-1NULL\s0 nothing is done. Calling \fBBIO_free()\fR 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 \&\s-1BIO_METHOD\s0 descriptions. .PP \&\fBBIO_free_all()\fR frees up an entire \s-1BIO\s0 chain, it does not halt if an error occurs freeing up an individual \s-1BIO\s0 in the chain. If \fBa\fR is \s-1NULL\s0 nothing is done. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBBIO_new()\fR returns a newly created \s-1BIO\s0 or \s-1NULL\s0 if the call fails. .PP \&\fBBIO_up_ref()\fR and \fBBIO_free()\fR return 1 for success and 0 for failure. .PP \&\fBBIO_free_all()\fR and \fBBIO_vfree()\fR do not return values. .SH "NOTES" .IX Header "NOTES" If \fBBIO_free()\fR is called on a \s-1BIO\s0 chain it will only free one \s-1BIO\s0 resulting in a memory leak. .PP Calling \fBBIO_free_all()\fR on a single \s-1BIO\s0 has the same effect as calling \fBBIO_free()\fR on it other than the discarded return value. .SH "HISTORY" .IX Header "HISTORY" \&\fBBIO_set()\fR was removed in OpenSSL 1.1.0 as \s-1BIO\s0 type is now opaque. .SH "EXAMPLES" .IX Header "EXAMPLES" Create a memory \s-1BIO:\s0 .PP .Vb 1 \& BIO mem = BIO_new(BIO_s_mem()); .Ve .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \(L"License\(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>. Back

Edit File : BIO_free.3 | Size : 6.17 KB

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.\" ========================================================================
.\"
.IX Title "BIO_NEW 3"
.TH BIO_NEW 3 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all \&\- BIO allocation and freeing functions
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBBIO_new()\fR function returns a new \s-1BIO\s0 using method \fBtype\fR.
.PP
\&\fBBIO_up_ref()\fR increments the reference count associated with the \s-1BIO\s0 object.
.PP
\&\fBBIO_free()\fR frees up a single \s-1BIO,\s0 \fBBIO_vfree()\fR also frees up a single \s-1BIO\s0
but it does not return a value.
If \fBa\fR is \s-1NULL\s0 nothing is done.
Calling \fBBIO_free()\fR 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
\&\s-1BIO_METHOD\s0 descriptions.
.PP
\&\fBBIO_free_all()\fR frees up an entire \s-1BIO\s0 chain, it does not halt if an error
occurs freeing up an individual \s-1BIO\s0 in the chain.
If \fBa\fR is \s-1NULL\s0 nothing is done.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBBIO_new()\fR returns a newly created \s-1BIO\s0 or \s-1NULL\s0 if the call fails.
.PP
\&\fBBIO_up_ref()\fR and \fBBIO_free()\fR return 1 for success and 0 for failure.
.PP
\&\fBBIO_free_all()\fR and \fBBIO_vfree()\fR do not return values.
.SH "NOTES"
.IX Header "NOTES"
If \fBBIO_free()\fR is called on a \s-1BIO\s0 chain it will only free one \s-1BIO\s0 resulting
in a memory leak.
.PP
Calling \fBBIO_free_all()\fR on a single \s-1BIO\s0 has the same effect as calling \fBBIO_free()\fR
on it other than the discarded return value.
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBBIO_set()\fR was removed in OpenSSL 1.1.0 as \s-1BIO\s0 type is now opaque.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Create a memory \s-1BIO:\s0
.PP
.Vb 1
\& BIO *mem = BIO_new(BIO_s_mem());
.Ve
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.

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