X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/fd6d7a01bca4544f5674438b189ba5ec1bce98af..b5304cc456ee27383d787591037f5d15ca3b274f:/ev_epoll.c

diff --git a/ev_epoll.c b/ev_epoll.c
index b3b546f..a7918af 100644
--- a/ev_epoll.c
+++ b/ev_epoll.c
@@ -1,3 +1,34 @@
+/*
+ * libev epoll fd activity backend
+ *
+ * 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:
+ *
+ *     * 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.
+ */
+
 #include <sys/epoll.h>
 
 static int epoll_fd = -1;
@@ -8,32 +39,33 @@ epoll_modify (int fd, int oev, int nev)
   int mode = nev ? oev ? EPOLL_CTL_MOD : EPOLL_CTL_ADD : EPOLL_CTL_DEL;
 
   struct epoll_event ev;
-  ev.data.fd = fd;
+  ev.data.u64 = fd; /* use u64 to fully initialise the struct, for nicer strace etc. */
   ev.events =
       (nev & EV_READ ? EPOLLIN : 0)
       | (nev & EV_WRITE ? EPOLLOUT : 0);
 
-  fprintf (stderr, "reify %d,%d,%d m%d (r=%d)\n", fd, oev, nev, mode,//D
-  epoll_ctl (epoll_fd, mode, fd, &ev)
-  );//D
+  epoll_ctl (epoll_fd, mode, fd, &ev);
 }
 
-void epoll_postfork_child (void)
+static void
+epoll_postfork_child (void)
 {
   int fd;
 
   epoll_fd = epoll_create (256);
+  fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
 
   /* re-register interest in fds */
   for (fd = 0; fd < anfdmax; ++fd)
-    if (anfds [fd].wev)
-      epoll_modify (fd, EV_NONE, anfds [fd].wev);
+    if (anfds [fd].events)//D
+      epoll_modify (fd, EV_NONE, anfds [fd].events);
 }
 
 static struct epoll_event *events;
 static int eventmax;
 
-static void epoll_poll (ev_tstamp timeout)
+static void
+epoll_poll (ev_tstamp timeout)
 {
   int eventcnt = epoll_wait (epoll_fd, events, eventmax, ceil (timeout * 1000.));
   int i;
@@ -43,34 +75,36 @@ static void epoll_poll (ev_tstamp timeout)
 
   for (i = 0; i < eventcnt; ++i)
     fd_event (
-      events [i].data.fd,
+      events [i].data.u64,
       (events [i].events & (EPOLLOUT | EPOLLERR | EPOLLHUP) ? EV_WRITE : 0)
       | (events [i].events & (EPOLLIN | EPOLLERR | EPOLLHUP) ? EV_READ : 0)
     );
 
   /* if the receive array was full, increase its size */
-  if (eventcnt == eventmax)
+  if (expect_false (eventcnt == eventmax))
     {
       free (events);
-      eventmax += eventmax >> 1;
+      eventmax = array_roundsize (events, eventmax << 1);
       events = malloc (sizeof (struct epoll_event) * eventmax);
     }
 }
 
-int epoll_init (int flags)
+static void
+epoll_init (int flags)
 {
   epoll_fd = epoll_create (256);
 
   if (epoll_fd < 0)
-    return 0;
+    return;
+
+  fcntl (epoll_fd, F_SETFD, FD_CLOEXEC);
 
-  ev_method = EVMETHOD_EPOLL;
+  ev_method     = EVMETHOD_EPOLL;
   method_fudge  = 1e-3; /* needed to compensate for epoll returning early */
   method_modify = epoll_modify;
   method_poll   = epoll_poll;
 
   eventmax = 64; /* intiial number of events receivable per poll */
   events = malloc (sizeof (struct epoll_event) * eventmax);
-
-  return 1;
 }
+