diff options
Diffstat (limited to 'doc/man3/BIO_new.pod')
-rw-r--r-- | doc/man3/BIO_new.pod | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/doc/man3/BIO_new.pod b/doc/man3/BIO_new.pod new file mode 100644 index 0000000000..006cf5925c --- /dev/null +++ b/doc/man3/BIO_new.pod @@ -0,0 +1,72 @@ +=pod + +=head1 NAME + +BIO_new, BIO_up_ref, BIO_free, BIO_vfree, BIO_free_all, +BIO_set - BIO allocation and freeing functions + +=head1 SYNOPSIS + + #include <openssl/bio.h> + + BIO * BIO_new(const BIO_METHOD *type); + int BIO_set(BIO *a, 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); + +=head1 DESCRIPTION + +The BIO_new() function returns a new BIO using method B<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 B<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 B<a> is NULL nothing is done. + +=head1 RETURN VALUES + +BIO_new() returns a newly created BIO or NULL if the call fails. + +BIO_set(), BIO_up_ref() and BIO_free() return 1 for success and 0 for failure. + +BIO_free_all() and BIO_vfree() do not return values. + +=head1 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. + +=head1 HISTORY + +BIO_set() was removed in OpenSSL 1.1.0 as BIO type is now opaque. + +=head1 EXAMPLE + +Create a memory BIO: + + BIO *mem = BIO_new(BIO_s_mem()); + +=head1 COPYRIGHT + +Copyright 2000-2016 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 +L<https://www.openssl.org/source/license.html>. + +=cut |