Unless you are maintaining a device driver for R, you can ignore this
note.
If you are, two issues have come up: the need to make sure there is a
slot available for a device before allocating it and, on unix at
least, the need to turn off interrupts during device initialization.
Currently typical device driver code starts the device something like this:
if (!(dd = (DevDesc *) malloc(sizeof(DevDesc))))
return 0;
...
addDevice(dd);
initDisplayList(dd);
To address these two problems in a device driver for R 1.2 this should
be changed to
R_CheckDeviceAvailable();
BEGIN_SUSPEND_INTERRUPTS {
if (!(dd = (DevDesc *) malloc(sizeof(DevDesc))))
return 0;
...
addDevice(dd);
initDisplayList(dd);
} END_SUSPEND_INTERRUPTS;
[Better yet, in case this changes before release, have a look at the
corresponding section of do_PS in the released sources.]
luke
--
Luke Tierney
University of Minnesota Phone: 612-625-7843
School of Statistics Fax: 612-624-8868
313 Ford Hall, 224 Church St. S.E. email: luke@stat.umn.edu
Minneapolis, MN 55455 USA WWW: http://www.stat.umn.edu
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