1 files changed, 131 insertions, 0 deletions
diff --git a/adns-0.6/src/poll.c b/adns-0.6/src/poll.c
new file mode 100644
index 0000000..45dc437
--- /dev/null
+++ b/adns-0.6/src/poll.c
@@ -0,0 +1,131 @@
+/*
+ * poll.c
+ * - wrappers for poll(2)
+ */
+/*
+ *  This file is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ *  It is part of adns, which is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *    Copyright (C) 1999 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
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *  
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software Foundation,
+ *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
+ */
+
+#include <limits.h>
+#include <string.h>
+
+#include "internal.h"
+
+#ifdef HAVE_POLL
+
+int adns_beforepoll(adns_state ads, struct pollfd *fds, int *nfds_io, int *timeout_io,
+		    const struct timeval *now) {
+  struct timeval tv_nowbuf, tv_tobuf, *tv_to;
+  int space, found, timeout_ms, r;
+  struct pollfd fds_tmp[MAX_POLLFDS];
+
+  adns__consistency(ads,0,cc_entex);
+
+  if (timeout_io) {
+    adns__must_gettimeofday(ads,&now,&tv_nowbuf);
+    if (!now) { *nfds_io= 0; r= 0; goto xit; }
+
+    timeout_ms= *timeout_io;
+    if (timeout_ms == -1) {
+      tv_to= 0;
+    } else {
+      tv_tobuf.tv_sec= timeout_ms / 1000;
+      tv_tobuf.tv_usec= (timeout_ms % 1000)*1000;
+      tv_to= &tv_tobuf;
+    }
+
+    adns__timeouts(ads, 0, &tv_to,&tv_tobuf, *now);
+
+    if (tv_to) {
+      assert(tv_to == &tv_tobuf);
+      timeout_ms= (tv_tobuf.tv_usec+999)/1000;
+      assert(tv_tobuf.tv_sec < (INT_MAX-timeout_ms)/1000);
+      timeout_ms += tv_tobuf.tv_sec*1000;
+    } else {
+      timeout_ms= -1;
+    }
+    *timeout_io= timeout_ms;
+  }
+  
+  space= *nfds_io;
+  if (space >= MAX_POLLFDS) {
+    found= adns__pollfds(ads,fds);
+    *nfds_io= found;
+  } else {
+    found= adns__pollfds(ads,fds_tmp);
+    *nfds_io= found;
+    if (space < found) { r= ERANGE; goto xit; }
+    memcpy(fds,fds_tmp,sizeof(struct pollfd)*found);
+  }
+  r= 0;
+xit:
+  adns__consistency(ads,0,cc_entex);
+  return r;
+}
+
+void adns_afterpoll(adns_state ads, const struct pollfd *fds, int nfds,
+		    const struct timeval *now) {
+  struct timeval tv_buf;
+
+  adns__consistency(ads,0,cc_entex);
+  adns__must_gettimeofday(ads,&now,&tv_buf);
+  if (now) {
+    adns__timeouts(ads, 1, 0,0, *now);
+    adns__fdevents(ads, fds,nfds, 0,0,0,0, *now,0);
+  }
+  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