Another minor point on a related subject: the documentation for pollcb_create() states that the size parameter controls "The maximum number of descriptors that a single _poll can return." This isn't true for the poll(2) pollcb method, however: _add() returns APR_ENOMEM if the number of active descriptors exceeds the initial size.
Neil On Tue, Jan 5, 2010 at 12:16 AM, Neil Conway <n...@cs.berkeley.edu> wrote: > (1) The documentation for apr_pollset_create() states that the "size" > parameter controls "The maximum number of descriptors that this > pollset can hold." However, ancient history like > http://www.mail-archive.com/dev@apr.apache.org/msg12876.html suggests > that "size" now just controls the # of events that can be signalled by > a single call to apr_pollset_poll(). > > From glancing at the code, it seems that the select provider has a > fixed limit on the pollset size, but kqueue, epoll and event port do > not, for example. Is that accurate? Perhaps the apr_pollset > documentation can be updated accordingly. > > (2) Is there a reason why apr_pollset_wakeup() was added, but there's > no analogous apr_pollcb_wakeup()? > > Speaking of which, it might be good to document the high-level > differences between apr_pollset and apr_pollcb -- without doing some > digging, it is not at all clear how they differ, or why one might > prefer one over the other. > > Thanks in advance for any advice, > > Neil >
