Patch for unix/poll.c (!HAVE_POLL)

[Charles Reitzel]

On Win2K, I was having a consistent problem with ab in the last N 
iterations with concurrency N.  For example, running "ab -n 20 -c 10 
http://example.com/foo"; would consistently cause a poll error out after 13 
or 15 requests.  The message (errno == 9) was that poll was passed 
something that is not a socket.

Anyway, I tracked down the problem to the post-select handling.  It doesn't 
quite match the pre-select handling.  The attached patch makes it so.  This 
patch is not platform-specific, but obviously only affects platforms w/out 
poll().

take it easy,
Charlie

*** poll.c Thu Sep 26 11:11:46 2002
--- /tmp/poll.c Tue Aug  6 17:06:12 2002
***************
*** 284,305 ****
      for (i = 0; i < num; i++) {
          apr_os_sock_t fd;
  
-         aprset[i].rtnevents = 0;
- 
          if (aprset[i].desc_type == APR_POLL_SOCKET) {
              fd = aprset[i].desc.s->socketdes;
          }
!         else  if (aprset[i].desc_type == APR_POLL_FILE) {
! #if APR_FILES_AS_SOCKETS
!             fd = aprset[i].desc.f->filedes;
! #else
              return APR_EBADF;
  #endif
          }
!         else if (aprset[i].desc_type == APR_NO_DESC) {
!             continue;
!         }
! 
          if (FD_ISSET(fd, &readset)) {
              aprset[i].rtnevents |= APR_POLLIN;
          }
--- 284,300 ----
      for (i = 0; i < num; i++) {
          apr_os_sock_t fd;
  
          if (aprset[i].desc_type == APR_POLL_SOCKET) {
              fd = aprset[i].desc.s->socketdes;
          }
!         else {
! #if !APR_FILES_AS_SOCKETS
              return APR_EBADF;
+ #else
+             fd = aprset[i].desc.f->filedes;
  #endif
          }
!         aprset[i].rtnevents = 0;
          if (FD_ISSET(fd, &readset)) {
              aprset[i].rtnevents |= APR_POLLIN;
          }