.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28)
.\"
.\" 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++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is turned on, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{
.    if \nF \{
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SSL_POLL 3ossl"
.TH SSL_POLL 3ossl "2024-06-04" "3.3.1" "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"
SSL_poll,
SSL_POLL_EVENT_NONE,
SSL_POLL_EVENT_F,
SSL_POLL_EVENT_EC,
SSL_POLL_EVENT_ECD,
SSL_POLL_EVENT_ER,
SSL_POLL_EVENT_EW,
SSL_POLL_EVENT_R,
SSL_POLL_EVENT_W,
SSL_POLL_EVENT_ISB,
SSL_POLL_EVENT_ISU,
SSL_POLL_EVENT_OSB,
SSL_POLL_EVENT_OSU,
SSL_POLL_EVENT_RW,
SSL_POLL_EVENT_RE,
SSL_POLL_EVENT_WE,
SSL_POLL_EVENT_RWE,
SSL_POLL_EVENT_E,
SSL_POLL_EVENT_IS,
SSL_POLL_EVENT_ISE,
SSL_POLL_EVENT_I,
SSL_POLL_EVENT_OS,
SSL_POLL_EVENT_OSE,
SSL_POLL_FLAG_NO_HANDLE_EVENTS
\&\- determine or await readiness conditions for one or more pollable objects
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& #define SSL_POLL_EVENT_NONE        0
\&
\& #define SSL_POLL_EVENT_F           /* F   (Failure) */
\& #define SSL_POLL_EVENT_EC          /* EC  (Exception on Conn) */
\& #define SSL_POLL_EVENT_ECD         /* ECD (Exception on Conn Drained) */
\& #define SSL_POLL_EVENT_ER          /* ER  (Exception on Read) */
\& #define SSL_POLL_EVENT_EW          /* EW  (Exception on Write) */
\& #define SSL_POLL_EVENT_R           /* R   (Readable) */
\& #define SSL_POLL_EVENT_W           /* W   (Writable) */
\& #define SSL_POLL_EVENT_ISB         /* ISB (Incoming Stream: Bidi) */
\& #define SSL_POLL_EVENT_ISU         /* ISU (Incoming Stream: Uni) */
\& #define SSL_POLL_EVENT_OSB         /* OSB (Outgoing Stream: Bidi) */
\& #define SSL_POLL_EVENT_OSU         /* OSU (Outgoing Stream: Uni) */
\&
\& #define SSL_POLL_EVENT_RW          /* R   | W         */
\& #define SSL_POLL_EVENT_RE          /* R   | ER        */
\& #define SSL_POLL_EVENT_WE          /* W   | EW        */
\& #define SSL_POLL_EVENT_RWE         /* RE  | WE        */
\& #define SSL_POLL_EVENT_E           /* EC  | ER  | EW  */
\& #define SSL_POLL_EVENT_IS          /* ISB | ISU       */
\& #define SSL_POLL_EVENT_ISE         /* IS  | EC        */
\& #define SSL_POLL_EVENT_I           /* IS              */
\& #define SSL_POLL_EVENT_OS          /* OSB | OSU       */
\& #define SSL_POLL_EVENT_OSE         /* OS  | EC        */
\&
\& typedef struct ssl_poll_item_st {
\&     BIO_POLL_DESCRIPTOR desc;
\&     uint64_t            events, revents;
\& } SSL_POLL_ITEM;
\&
\& #define SSL_POLL_FLAG_NO_HANDLE_EVENTS
\&
\& int SSL_poll(SSL_POLL_ITEM         *items,
\&              size_t                num_items,
\&              size_t                stride,
\&              const struct timeval  *timeout,
\&              uint64_t              flags,
\&              size_t                *result_count);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_poll()\fR allows the readiness conditions of the resources represented by one
or more \s-1BIO_POLL_DESCRIPTOR\s0 structures to be determined. In particular, it can
be used to query for readiness conditions on \s-1QUIC\s0 connection \s-1SSL\s0 objects and
\&\s-1QUIC\s0 stream \s-1SSL\s0 objects in a single call.
.PP
A call to \fISSL_poll()\fR specifies an array of \fB\s-1SSL_POLL_ITEM\s0\fR structures, each of
which designates a resource which is being polled for readiness, and a set of
event flags which indicate the specific readiness events which the caller is
interested in in relation to the specified resource.
.PP
The fields of \fB\s-1SSL_POLL_ITEM\s0\fR are as follows:
.IP "\fIdesc\fR" 4
.IX Item "desc"
The resource being polled for readiness, as represented by a
\&\fB\s-1BIO_POLL_DESCRIPTOR\s0\fR. Currently, this must be a poll descriptor of type
\&\fB\s-1BIO_POLL_DESCRIPTOR_TYPE_SSL\s0\fR, representing a \s-1SSL\s0 object pointer, and the \s-1SSL\s0
object must be a \s-1QUIC\s0 connection \s-1SSL\s0 object or \s-1QUIC\s0 stream \s-1SSL\s0 object.
.Sp
If a \fB\s-1SSL_POLL_ITEM\s0\fR has a poll descriptor type of
\&\fB\s-1BIO_POLL_DESCRIPTOR_TYPE_NONE\s0\fR, or the \s-1SSL\s0 object pointer is \s-1NULL,\s0 the
\&\fB\s-1SSL_POLL_ITEM\s0\fR array entry is ignored and \fIrevents\fR will be set to 0 on
return.
.IP "\fIevents\fR" 4
.IX Item "events"
This is the set of zero or more events which the caller is interested in
learning about in relation to the resource described by \fIdesc\fR. It is a
collection of zero or more \fB\s-1SSL_POLL_EVENT\s0\fR flags. See \*(L"\s-1EVENT TYPES\*(R"\s0 for a
description of each of the event types.
.IP "\fIrevents\fR" 4
.IX Item "revents"
After \fISSL_poll()\fR returns, this is the set of zero or more events which are
actually applicable to the resource described by \fIdesc\fR. As for \fIevents\fR,
it is a collection of zero or more \fB\s-1SSL_POLL_EVENT\s0\fR flags.
.Sp
\&\fIrevents\fR need not be a subset of the events specified in \fIevents\fR, as some
event types are defined as always being enabled (non-maskable). See \*(L"\s-1EVENT
TYPES\*(R"\s0 for more information.
.PP
To use \fISSL_poll()\fR, call it with an array of \fB\s-1SSL_POLL_ITEM\s0\fR structures. The
array need remain allocated only for the duration of the call. \fInum_items\fR must
be set to the number of entries in the array, and \fIstride\fR must be set to
\&\f(CW\*(C`sizeof(SSL_POLL_ITEM)\*(C'\fR.
.PP
The present implementation of \fISSL_poll()\fR is a subset of the functionality which
will eventually be available. Only a nonblocking mode of operation is available
at this time, where \fISSL_poll()\fR always returns immediately. As such, \fItimeout\fR
must point to a valid \fBstruct timeval\fR and that structure must be set to zero.
In future, other inputs to the \fItimeout\fR argument will result in a blocking
mode of operation, which is not currently supported. For more information, see
\&\*(L"\s-1LIMITATIONS\*(R"\s0.
.PP
The following flags are currently defined for the \fIflags\fR argument:
.IP "\fB\s-1SSL_POLL_FLAG_NO_HANDLE_EVENTS\s0\fR" 4
.IX Item "SSL_POLL_FLAG_NO_HANDLE_EVENTS"
This flag indicates that internal state machine processing should not be
performed in an attempt to generate new readiness events. Only existing
readiness events will be reported.
.PP
The \fIresult_count\fR argument is optional. If it is non-NULL, it is used to
output the number of entries in the array which have nonzero \fIrevents\fR fields
when the call to \fISSL_poll()\fR returns; see \*(L"\s-1RETURN VALUES\*(R"\s0 for details.
.SH "EVENT TYPES"
.IX Header "EVENT TYPES"
The \fISSL_poll()\fR interface reports zero or more event types on a given resource,
represented by a bit mask.
.PP
All of the event types are level triggered and represent a readiness or
permanent exception condition; as such, after an event has been reported by
\&\fISSL_poll()\fR for a resource, it will continue to be reported in future \fISSL_poll()\fR
calls until the condition ceases to be in effect. A caller must mask the given
event type bit in future \fISSL_poll()\fR calls if it does not wish to receive
repeated notifications and has not caused the underlying readiness condition
(for example, consuming all available data using \fISSL_read_ex\fR\|(3) after
\&\fB\s-1SSL_POLL_EVENT_R\s0\fR is reported) to be deasserted.
.PP
Some event types do not make sense on a given kind of resource. In this case,
specifying that event type in \fIevents\fR is a no-op and will be ignored, and the
given event will never be reported in \fIrevents\fR.
.PP
Failure of the polling mechanism itself is considered distinct from an exception
condition on a resource which was successfully polled. See \fB\s-1SSL_POLL_EVENT_F\s0\fR
and \*(L"\s-1RETURN VALUES\*(R"\s0 for details.
.PP
In general, an application should always listen for the event types
corresponding to exception conditions if it is listening to the corresponding
non-exception event types (e.g. \fB\s-1SSL_POLL_EVENT_EC\s0\fR and \fB\s-1SSL_POLL_EVENT_ER\s0\fR
for \fB\s-1SSL_POLL_EVENT_R\s0\fR), as not doing so is unlikely to be a sound design.
.PP
Some event types are non-maskable and may be reported in \fIrevents\fR regardless
of whether they were requested in \fIevents\fR.
.PP
The following event types are supported:
.IP "\fB\s-1SSL_POLL_EVENT_F\s0\fR" 4
.IX Item "SSL_POLL_EVENT_F"
Polling failure. This event is raised when a resource could not be polled. It is
distinct from an exception condition reported on a resource which was
successfully polled and represents a failure of the polling process itself in
relation to a resource. This may mean that \fISSL_poll()\fR does not support the kind
of resource specified.
.Sp
Where this event is raised on at least one item in \fIitems\fR, \fISSL_poll()\fR will
return 0 and the \s-1ERR\s0 stack will contain information pertaining to the first item
in \fIitems\fR with \fB\s-1SSL_POLL_EVENT_F\s0\fR set. See \*(L"\s-1RETURN VALUES\*(R"\s0 for more
information.
.Sp
This event type may be raised even if it was not requested in \fIevents\fR;
specifying this event type in \fIevents\fR does nothing.
.IP "\fB\s-1SSL_POLL_EVENT_EC\s0\fR" 4
.IX Item "SSL_POLL_EVENT_EC"
Error at connection level. This event is raised when a connection has failed.
In particular, it is raised when a connection begins terminating.
.Sp
This event is never raised on objects which are not connections.
.IP "\fB\s-1SSL_POLL_EVENT_DCD\s0\fR" 4
.IX Item "SSL_POLL_EVENT_DCD"
Error at connection level (drained). This event is raised when a connection has
finished terminating, and has reached the terminated state. This event will
generally occur after an interval of time passes after the \fB\s-1SSL_POLL_EVENT_EC\s0\fR
event is raised on a connection.
.Sp
This event is never raised on objects which are not connections.
.IP "\fB\s-1SSL_POLL_EVENT_ER\s0\fR" 4
.IX Item "SSL_POLL_EVENT_ER"
Error in read direction. For \s-1QUIC,\s0 this is raised only in the event that a
stream has a read part and that read part has been reset by the peer (for
example, using a \fB\s-1RESET_STREAM\s0\fR frame).
.IP "\fB\s-1SSL_POLL_EVENT_EW\s0\fR" 4
.IX Item "SSL_POLL_EVENT_EW"
Error in write direction. For \s-1QUIC,\s0 this is raised only in the event that a
stream has a write part and that write part has been reset by the peer using a
\&\fB\s-1STOP_SENDING\s0\fR frame.
.IP "\fB\s-1SSL_POLL_EVENT_R\s0\fR" 4
.IX Item "SSL_POLL_EVENT_R"
Readable. This event is raised when a \s-1QUIC\s0 stream \s-1SSL\s0 object (or a \s-1QUIC\s0
connection \s-1SSL\s0 object with a default stream attached) has application data
waiting to be read using \fISSL_read_ex\fR\|(3), or a \s-1FIN\s0 event as represented by
\&\fB\s-1SSL_ERROR_ZERO_RETURN\s0\fR waiting to be read.
.Sp
It is not raised in the event of the receiving part of the \s-1QUIC\s0 stream being
reset by the peer; see \fB\s-1SSL_POLL_EVENT_ER\s0\fR.
.IP "\fB\s-1SSL_POLL_EVENT_W\s0\fR" 4
.IX Item "SSL_POLL_EVENT_W"
Writable. This event is raised when a \s-1QUIC\s0 stream \s-1SSL\s0 object (or a \s-1QUIC\s0
connection \s-1SSL\s0 object with a default stream attached) could accept more
application data using \fISSL_write_ex\fR\|(3).
.Sp
This event is never raised by a receive-only stream.
.Sp
This event is never raised by a stream which has had its send part concluded
normally (as with \fISSL_stream_conclude\fR\|(3)) or locally reset (as with
\&\fISSL_stream_reset\fR\|(3)).
.Sp
This event does not guarantee that a subsequent call to \fISSL_write_ex\fR\|(3) will
succeed.
.IP "\fB\s-1SSL_POLL_EVENT_ISB\s0\fR" 4
.IX Item "SSL_POLL_EVENT_ISB"
This event, which is only raised by a \s-1QUIC\s0 connection \s-1SSL\s0 object, is raised when
one or more incoming bidirectional streams are available to be accepted using
\&\fISSL_accept_stream\fR\|(3).
.IP "\fB\s-1SSL_POLL_EVENT_ISU\s0\fR" 4
.IX Item "SSL_POLL_EVENT_ISU"
This event, which is only raised by a \s-1QUIC\s0 connection \s-1SSL\s0 object, is raised when
one or more incoming unidirectional streams are available to be accepted using
\&\fISSL_accept_stream\fR\|(3).
.IP "\fB\s-1SSL_POLL_EVENT_OSB\s0\fR" 4
.IX Item "SSL_POLL_EVENT_OSB"
This event, which is only raised by a \s-1QUIC\s0 connection \s-1SSL\s0 object, is raised when
\&\s-1QUIC\s0 stream creation flow control currently permits at least one additional
bidirectional stream to be locally created.
.IP "\fB\s-1SSL_POLL_EVENT_OSU\s0\fR" 4
.IX Item "SSL_POLL_EVENT_OSU"
This event, which is only raised by a \s-1QUIC\s0 connection \s-1SSL\s0 object, is raised when
\&\s-1QUIC\s0 stream creation flow control currently permits at least one additional
unidirectional stream to be locally created.
.SH "LIMITATIONS"
.IX Header "LIMITATIONS"
\&\fISSL_poll()\fR as presently implemented has the following limitations:
.IP "\(bu" 4
The implementation of \fISSL_poll()\fR only supports nonblocking operation and
therefore requires the \fItimeout\fR argument be used to specify a zero timeout.
Calls to \fISSL_poll()\fR which specify another value, or which pass \fItimeout\fR as
\&\s-1NULL,\s0 will fail. This does not allow waiting, but does allow multiple \s-1QUIC SSL\s0
objects to be queried for their readiness state in a single call.
.Sp
Future releases will remove this limitation and support blocking \fISSL_poll()\fR.
.IP "\(bu" 4
Only \fB\s-1BIO_POLL_DESCRIPTOR\s0\fR structures with type
\&\fB\s-1BIO_POLL_DESCRIPTOR_TYPE_SSL\s0\fR, referencing \s-1QUIC\s0 connection \s-1SSL\s0 objects or \s-1QUIC\s0
stream \s-1SSL\s0 objects, are supported.
.PP
These limitations will be revised in a future release of OpenSSL.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fISSL_poll()\fR returns 1 on success and 0 on failure.
.PP
Unless the \fIitems\fR pointer itself is invalid, \fISSL_poll()\fR will always initialise
the \fIrevents\fR fields of all items in the input array upon returning, even if it
returns failure.
.PP
If \fIresult_count\fR is non-NULL, it is always written with the number of items in
the array with nonzero \fIrevents\fR fields, even if the \fISSL_poll()\fR call returns
failure.
.PP
It is possible for \fIresult_count\fR to be written as 0 even if the \fISSL_poll()\fR
call returns success, namely if no events were output but the polling process
was successful (e.g. in nonblocking usage) or timed out.
.PP
It is possible for \fIresult_count\fR to be written as a nonzero value if the
\&\fISSL_poll()\fR call returns failure, for example due to \fB\s-1SSL_POLL_EVENT_F\s0\fR events,
or because some events were detected and output before encountering a failure
condition while processing a subsequent entry in the \fIitems\fR array.
.PP
If at least one \fB\s-1SSL_POLL_EVENT_F\s0\fR event is output, \fISSL_poll()\fR is guaranteed
to return 0 and guaranteed to place at least one \s-1ERR\s0 on the error stack
describing the first \fB\s-1SSL_POLL_EVENT_F\s0\fR output. Detailed information on any
additional \fB\s-1SSL_POLL_EVENT_F\s0\fR events is not available. \fISSL_poll()\fR may or may
not return more than one \fB\s-1SSL_POLL_EVENT_F\s0\fR event at once.
.PP
\&\*(L"Normal\*(R" events representing exceptional I/O conditions which do not
constitute a failure of the \fISSL_poll()\fR mechanism itself are not considered
errors by \fISSL_poll()\fR and are instead represented using their own event type; see
\&\*(L"\s-1EVENT TYPES\*(R"\s0 for details.
.PP
The caller can establish the meaning of the \fISSL_poll()\fR return and output values
as follows:
.IP "\(bu" 4
If \fISSL_poll()\fR returns 1 and \fIresult_count\fR is zero, the operation timed out
before any resource was ready.
.IP "\(bu" 4
If \fISSL_poll()\fR returns 1 and \fIresult_count\fR is nonzero, that many events were
output.
.IP "\(bu" 4
If \fISSL_poll()\fR returns 0 and \fIresult_count\fR is zero, the caller has made a basic
usage error; check the \s-1ERR\s0 stack for details.
.IP "\(bu" 4
If \fISSL_poll()\fR returns 0 and \fIresult_count\fR is nonzero, inspect the \fIitems\fR
array for \fB\s-1SSL_POLL_ITEM\s0\fR structures with the \fB\s-1SSL_POLL_EVENT_F\s0\fR event type
raised in \fIrevents\fR. The entries added to the \s-1ERR\s0 stack (of which there is
guaranteed to be at least one) reflect the cause of the failure of the first
item in \fIitems\fR with \fB\s-1SSL_POLL_EVENT_F\s0\fR raised. Note that there may be events
other than \fI\s-1SSL_POLL_EVENT_F\s0\fR output for items which come before the first
item with \fB\s-1SSL_POLL_EVENT_F\s0\fR raised, and additional \fB\s-1SSL_POLL_EVENT_F\s0\fR
events may or may not have been output, both of which which will be reflected in
\&\fIresult_count\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIBIO_get_rpoll_descriptor\fR\|(3), \fIBIO_get_wpoll_descriptor\fR\|(3),
\&\fISSL_get_rpoll_descriptor\fR\|(3), \fISSL_get_wpoll_descriptor\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fISSL_poll()\fR was added in OpenSSL 3.3.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2024 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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>.