I and Vasan Sundar recently ported Poller_poll.cc to c,
and I'm using it in a fun little load test app at work.
While debugging that app, I happened to run valgrind on it,
and valgrind found an uninitialized memory bug in Poller_poll.c.
Here's the fix; the corresponding fix to the C++ version is identical.

(I'm starting to really like Valgrind... it's in debian testing,
so all I had to do to get it was 'apt-get install valgrind',
but it's a real easy compile and install from source, too.
It's at http://developer.kde.org/~sewardj/ )

--- ../se4/Poller_poll.c Fri Sep 27 15:36:17 2002
+++ Poller_poll.c Thu Oct 3 11:54:17 2002
@@ -29,6 +29,7 @@

int Poller_poll_init(Poller_poll *pp)
{
+ int i;
DPRINT(("init()\n"));

// Allocate things indexed by file descriptor.
@@ -37,6 +38,9 @@
pp->m_fd2pfdnum = (int *)malloc(sizeof(int) *
pp->m_fd2client_alloc);
if (!pp->m_fd2pfdnum)
return ENOMEM;
+ // Clear new elements
+ for (i=0; i<pp->m_fd2client_alloc; i++)
+ pp->m_fd2pfdnum[i] = -1;

// Allocate things indexed by client number.
pp->m_pfds_used = 0;