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.\" ========================================================================
.\"
.IX Title "xpaopen 3"
.TH xpaopen 3 "July 23, 2013" "version 2.1.15" "SAORD Documentation"
.\" 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"
\&\fBXPAOpen: allocate a persistent client handle\fR
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  #include <xpa.h>
\&
\&  XPA XPAOpen(char *mode);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIXPAOpen()\fR allocates a persistent \s-1XPA\s0 struct that can be used with
calls to \fIXPAGet()\fR, \fIXPASet()\fR, \fIXPAInfo()\fR, \fIXPAGetFd()\fR, and
\&\fIXPASetFd()\fR. Persistence means that a connection to an \s-1XPA\s0 server is
not closed when one of the above calls is completed but will be
re-used on successive calls. Using \fIXPAOpen()\fR therefore saves the time
it takes to connect to a server, which could be significant with slow
connections or if there will be a large number of exchanges with a
given access point.  The mode argument currently is ignored (\*(L"reserved
for future use\*(R").
.PP
An \s-1XPA\s0 struct is returned if \fIXPAOpen()\fR was successful; otherwise \s-1NULL\s0
is returned. This returned struct can be passed as the first argument
to \fIXPAGet()\fR, etc.  Those calls will update the list of active \s-1XPA\s0
connections.  Already connected servers (from a previous call) are
left connected and new servers also will be connected.  Old servers
(from a previous call) that are no longer needed are disconnected.
The connected servers will remain connected when the next call to
\&\fIXPAGet()\fR is made and connections are once again updated.
.PP
\&\fBExample:\fR
.PP
.Vb 1
\& #include <xpa.h>
\&
\&  XPA xpa;
\&  xpa = XPAOpen(NULL);
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
See xpa(n) for a list of \s-1XPA\s0 help pages