xpaname(7) SAORD Documentation xpaname(7)NAME
XPAName - What does XPA stand for?
SYNOPSIS
What does XPA stand for? Who knows anymore!
DESCRIPTION
What does XPA stand for? Dunno! The XPA messaging system originally was built on top of the X Window System and XPA was the mnemonic for X
Public Access, to emphasize that we were providing public access to previously private data and algorithms in Xt programs. Now that XPA no
longer is tied to X, it can be argued that we ought to change the name (how about SPAM: simple public access mechanism ), but XPA is in
wide-spread use in the astronomical community of its birth, and the name has taken on a life of its own. If anyone can think of what XPA
now means, please let us know.
If you think this is bad, consider the MMT Telescope on Mount Hopkins, Arizona. When first installed twenty years ago, it featured an array
of six 72-inch diameter mirrors. from which came its name: the Multiple Mirror Telescope. In spring of 1999, these mirrors were replaced
by a single 21 and 1/2 -foot diameter primary mirror, the largest single-piece glass reflector on the North American continent. And now
MMT stands for ... MMT!
SEE ALSO
See xpa(7) for a list of XPA help pages
version 2.1.14 June 7, 2012 xpaname(7)
Check Out this Related Man Page
xpaopen(3) SAORD Documentation xpaopen(3)NAME
XPAOpen - allocate a persistent client handle
SYNOPSIS
#include <xpa.h>
XPA XPAOpen(char *mode);
DESCRIPTION
XPAOpen() allocates a persistent XPA struct that can be used with calls to XPAGet(), XPASet(), XPAInfo(), XPAGetFd(), and XPASetFd(). Per-
sistence means that a connection to an XPA server is not closed when one of the above calls is completed but will be re-used on successive
calls. Using XPAOpen() 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 ("reserved for future use").
An XPA struct is returned if XPAOpen() was successful; otherwise NULL is returned. This returned struct can be passed as the first argument
to XPAGet(), etc. Those calls will update the list of active XPA 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 con-
nected servers will remain connected when the next call to XPAGet() is made and connections are once again updated.
Example -
#include <xpa.h>
XPA xpa;
xpa = XPAOpen(NULL);
SEE ALSO
See xpa(7) for a list of XPA help pages
version 2.1.14 June 7, 2012 xpaopen(3)
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