*** empty log message ***

Changes

@@ -17,6 +17,8 @@ TODO: maybe allow events = 0 for io watchers
           work with older libev versions as well but was not officially
           allowed before.
         - do not wake up every minute when timerfd is used to detect timejumps.
+        - do not wake up every minute when periodics are disabled and we have
+          a monotonic clock.
         - support a lot more "uncommon" compile time configurations,
           such as ev_embed enabled but ev_timer disabled.
         - use a start/stop wrapper class to reduce code duplication in

ev++.h

@@ -1,7 +1,7 @@
 /*
  * libev simple C++ wrapper classes
  *
- * Copyright (c) 2007,2008,2010,2018 Marc Alexander Lehmann <libev@schmorp.de>
+ * Copyright (c) 2007,2008,2010,2018,2020 Marc Alexander Lehmann <libev@schmorp.de>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without modifica-

ev.c

@@ -3045,7 +3045,9 @@ timerfdcb (EV_P_ ev_io *iow, int revents)
   now_floor = EV_TS_CONST (0.);
   time_update (EV_A_ EV_TSTAMP_HUGE);
   */
+#if EV_PERIODIC_ENABLE
   periodics_reschedule (EV_A);
+#endif
 }
 
 ecb_noinline ecb_cold
@@ -4097,6 +4099,12 @@ ev_run (EV_P_ int flags)
             if (ecb_expect_true (timerfd >= 0))
               waittime = EV_TS_CONST (MAX_BLOCKTIME2);
 #endif
+#if !EV_PERIODIC_ENABLE
+            /* without periodics but with monotonic clock there is no need */
+            /* for any time jump detection, so sleep longer */
+            if (ecb_expect_true (have_monotonic))
+              waittime = EV_TS_CONST (MAX_BLOCKTIME2);
+#endif
 
             if (timercnt)
               {

ev.pod

@@ -1655,8 +1655,9 @@ Most members are additionally marked with either I<[read-only]>, meaning
 that, while the watcher is active, you can look at the member and expect
 some sensible content, but you must not modify it (you can modify it while
 the watcher is stopped to your hearts content), or I<[read-write]>, which
-means you can expect it to have some sensible content while the watcher
-is active, but you can also modify it. Modifying it may not do something
+means you can expect it to have some sensible content while the watcher is
+active, but you can also modify it (within the same thread as the event
+loop, i.e. without creating data races). Modifying it may not do something
 sensible or take immediate effect (or do anything at all), but libev will
 not crash or malfunction in any way.