X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/adns/blobdiff_plain/28de64428cfdb63ad07acfcfc254907b608d5137..df1d3fe60d1295f9935b08528f2bcff01fa90e31:/src/poll.c

diff --git a/src/poll.c b/src/poll.c
index 7b1054a..63de431 100644
--- a/src/poll.c
+++ b/src/poll.c
@@ -3,7 +3,12 @@
  * - wrappers for poll(2)
  */
 /*
- *  This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
+ *  This file is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ *  It is part of adns, which is
+ *    Copyright (C) 1997-2000 Ian Jackson <ian@davenant.greenend.org.uk>
+ *    Copyright (C) 1999-2000 Tony Finch <dot@dotat.at>
  *  
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -21,6 +26,7 @@
  */
 
 #include <limits.h>
+#include <string.h>
 
 #include "internal.h"
 
@@ -89,4 +95,37 @@ void adns_afterpoll(adns_state ads, const struct pollfd *fds, int nfds,
   adns__consistency(ads,0,cc_entex);
 }
 
+int adns_wait_poll(adns_state ads,
+		   adns_query *query_io,
+		   adns_answer **answer_r,
+		   void **context_r) {
+  int r, nfds, to;
+  struct pollfd fds[MAX_POLLFDS];
+  
+  adns__consistency(ads,0,cc_entex);
+
+  for (;;) {
+    r= adns__internal_check(ads,query_io,answer_r,context_r);
+    if (r != EAGAIN) goto xit;
+    nfds= MAX_POLLFDS; to= -1;
+    adns_beforepoll(ads,fds,&nfds,&to,0);
+    r= poll(fds,nfds,to);
+    if (r == -1) {
+      if (errno == EINTR) {
+	if (ads->iflags & adns_if_eintr) { r= EINTR; goto xit; }
+      } else {
+	adns__diag(ads,-1,0,"poll failed in wait: %s",strerror(errno));
+	adns_globalsystemfailure(ads);
+      }
+    } else {
+      assert(r >= 0);
+      adns_afterpoll(ads,fds,nfds,0);
+    }
+  }
+
+ xit:
+  adns__consistency(ads,0,cc_entex);
+  return r;
+}
+
 #endif