Add exceptions support to C++ interface.

[software/libev.git] / ev_poll.c

diff --git a/ev_poll.c b/ev_poll.c
index 52fe42d129620fd099f772d3fd9160dbdfdc8bdd..388aec0e832888167f2042be9e4497e8fc9063d7 100644 (file)
--- a/ev_poll.c
+++ b/ev_poll.c
@@ -4,34 +4,42 @@
  * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
+ * Redistribution and use in source and binary forms, with or without modifica-
+ * tion, are permitted provided that the following conditions are met:
+ * 
+ *   1.  Redistributions of source code must retain the above copyright notice,
+ *       this list of conditions and the following disclaimer.
+ * 
+ *   2.  Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
+ * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
+ * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
+ * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *
- *     * Redistributions in binary form must reproduce the above
- *       copyright notice, this list of conditions and the following
- *       disclaimer in the documentation and/or other materials provided
- *       with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU General Public License ("GPL") version 2 or any later version,
+ * in which case the provisions of the GPL are applicable instead of
+ * the above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the BSD license, indicate your decision
+ * by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file under
+ * either the BSD or the GPL.
  */
 
 #include <poll.h>
 
-static void
+void inline_size
 pollidx_init (int *base, int count)
 {
   while (count--)
@@ -67,7 +75,7 @@ poll_modify (EV_P_ int fd, int oev, int nev)
     {
       pollidxs [fd] = -1;
 
-      if (idx < --pollcnt)
+      if (expect_true (idx < --pollcnt))
         {
           polls [idx] = polls [pollcnt];
           pollidxs [polls [idx].fd] = idx;
@@ -81,7 +89,7 @@ poll_poll (EV_P_ ev_tstamp timeout)
   int i;
   int res = poll (polls, pollcnt, (int)ceil (timeout * 1000.));
 
-  if (res < 0)
+  if (expect_false (res < 0))
     {
       if (errno == EBADF)
         fd_ebadf (EV_A);
@@ -94,7 +102,7 @@ poll_poll (EV_P_ ev_tstamp timeout)
     }
 
   for (i = 0; i < pollcnt; ++i)
-    if (polls [i].revents & POLLNVAL)
+    if (expect_false (polls [i].revents & POLLNVAL))
       fd_kill (EV_A_ polls [i].fd);
     else
       fd_event (
@@ -108,7 +116,7 @@ poll_poll (EV_P_ ev_tstamp timeout)
 int inline_size
 poll_init (EV_P_ int flags)
 {
-  backend_fudge  = 1e-3; /* needed to compensate for select returning early, very conservative */
+  backend_fudge  = 0.; /* posix says this is zero */
   backend_modify = poll_modify;
   backend_poll   = poll_poll;