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resume/suspend

master
Marc Alexander Lehmann 11 years ago
parent
commit
7913464bd4
4 changed files with 41 additions and 5 deletions
  1. +3
    -2
      Changes
  2. +2
    -1
      ev.c
  3. +10
    -2
      ev.h
  4. +26
    -0
      ev.pod

+ 3
- 2
Changes View File

@ -1,8 +1,8 @@
Revision history for libev, a high-performance and full-featured event loop.
TODO: ev_time_freeze, ev_time_thaw
TODO: ev_walk
TODO: ev_stop_all
TODO: ev_stop_all docs
TODO: priority/idle docs
TODO: fix signal handling(?) under win32
3.54
- multiple timers becoming ready within an event loop iteration
@ -14,6 +14,7 @@ TODO: fix signal handling(?) under win32
- correctly zero the idx values for arrays, so destroying and
reinitialising the default loop actually works (patch by
Malek Hadj-Ali).
- implement ev_suspend and ev_resume.
- new EV_CUSTOM revents flag for use by applications.
3.53 Sun Feb 15 02:38:20 CET 2009


+ 2
- 1
ev.c View File

@ -2135,9 +2135,10 @@ ev_resume (EV_P)
ev_tstamp mn_prev = mn_now;
ev_now_update (EV_A);
printf ("update %f\n", mn_now - mn_prev);//D
timers_reschedule (EV_A_ mn_now - mn_prev);
#if EV_PERIODIC_ENABLE
periodics_reschedule (EV_A);
#endif
}
/*****************************************************************************/


+ 10
- 2
ev.h View File

@ -526,8 +526,16 @@ void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at lea
void ev_ref (EV_P);
void ev_unref (EV_P);
/* convenience function, wait for a single event, without registering an event watcher */
/* if timeout is < 0, do wait indefinitely */
/*
* stop/start the timer handling.
*/
void ev_suspend (EV_P);
void ev_resume (EV_P);
/*
* convenience function, wait for a single event, without registering an event watcher
* if timeout is < 0, do wait indefinitely
*/
void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
#endif


+ 26
- 0
ev.pod View File

@ -636,6 +636,32 @@ the current time is a good idea.
See also "The special problem of time updates" in the C<ev_timer> section.
=item ev_suspend (loop)
=item ev_resume (loop)
These two functions suspend and resume a loop, for use when the loop is
not used for a while and timeouts should not be processed.
A typical use case would be an interactive program such as a game: When
the user presses C<^Z> to suspend the game and resumes it an hour later it
would be best to handle timeouts as if no time had actually passed while
the program was suspended. This can be achieved by calling C<ev_suspend>
in your C<SIGTSTP> handler, sending yourself a C<SIGSTOP> and calling
C<ev_resume> directly afterwards to resume timer processing.
Effectively, all C<ev_timer> watchers will be delayed by the time spend
between C<ev_suspend> and C<ev_resume>, and all C<ev_periodic> watchers
will be rescheduled (that is, they will lose any events that would have
occured while suspended).
After calling C<ev_suspend> you B<must not> call I<any> function on the
given loop other than C<ev_resume>, and you B<must not> call C<ev_resume>
without a previous call to C<ev_suspend>.
Calling C<ev_suspend>/C<ev_resume> has the side effect of updating the
event loop time (see C<ev_now_update>).
=item ev_loop (loop, int flags)
Finally, this is it, the event handler. This function usually is called


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