From 0ca732a60d2a2fa1d0fd7526aa267cf0267ed7fc Mon Sep 17 00:00:00 2001
From: root <root>
Date: Mon, 29 Jun 2009 18:46:52 +0000
Subject: *** empty log message ***

---
 Changes |  2 ++
 ev.c    | 24 ++++++++++++++++--------
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/Changes b/Changes
index a9dd69c..8f3d18c 100644
--- a/Changes
+++ b/Changes
@@ -3,7 +3,9 @@ Revision history for libev, a high-performance and full-featured event loop.
 TODO: ev_walk
 TODO: child wactehr execution order w.r.t. childsigcb reg. priorities
 TODO: remain
+TODO: io_collect documentation
 	- Denis F. Latypoff corrected many typos in example code snippets.
+	- the ev_set_io_collect_interval interpretation has changed.
         - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
           check that the syscall number is available before trying to
           use it (reported by ry@tinyclouds).
diff --git a/ev.c b/ev.c
index 5d86f37..c5c3989 100644
--- a/ev.c
+++ b/ev.c
@@ -629,7 +629,7 @@ ev_sleep (ev_tstamp delay)
       tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
 
       /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
-      /* somehting nto guaranteed by newer posix versions, but guaranteed */
+      /* somehting not guaranteed by newer posix versions, but guaranteed */
       /* by older ones */
       select (0, 0, 0, 0, &tv);
 #endif
@@ -2077,6 +2077,9 @@ ev_loop (EV_P_ int flags)
 
         if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
           {
+            /* remember old timestamp for io_blocktime calculation */
+            ev_tstamp prev_mn_now = mn_now;
+
             /* update time to cancel out callback processing overhead */
             time_update (EV_A_ 1e100);
 
@@ -2096,18 +2099,23 @@ ev_loop (EV_P_ int flags)
               }
 #endif
 
+            /* don't let timeouts decrease the waittime below timeout_blocktime */
             if (expect_false (waittime < timeout_blocktime))
               waittime = timeout_blocktime;
 
-            sleeptime = waittime - backend_fudge;
+            /* extra check because io_blocktime is commonly 0 */
+            if (expect_false (io_blocktime))
+              {
+                sleeptime = io_blocktime - (mn_now - prev_mn_now);
 
-            if (expect_true (sleeptime > io_blocktime))
-              sleeptime = io_blocktime;
+                if (sleeptime > waittime - backend_fudge)
+                  sleeptime = waittime - backend_fudge;
 
-            if (sleeptime)
-              {
-                ev_sleep (sleeptime);
-                waittime -= sleeptime;
+                if (expect_true (sleeptime > 0.))
+                  {
+                    ev_sleep (sleeptime);
+                    waittime -= sleeptime;
+                  }
               }
           }
 
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