… | |
… | |
58 | ev_timer_start (loop, &timeout_watcher); |
58 | ev_timer_start (loop, &timeout_watcher); |
59 | |
59 | |
60 | // now wait for events to arrive |
60 | // now wait for events to arrive |
61 | ev_run (loop, 0); |
61 | ev_run (loop, 0); |
62 | |
62 | |
63 | // unloop was called, so exit |
63 | // break was called, so exit |
64 | return 0; |
64 | return 0; |
65 | } |
65 | } |
66 | |
66 | |
67 | =head1 ABOUT THIS DOCUMENT |
67 | =head1 ABOUT THIS DOCUMENT |
68 | |
68 | |
… | |
… | |
868 | anymore. |
868 | anymore. |
869 | |
869 | |
870 | ... queue jobs here, make sure they register event watchers as long |
870 | ... queue jobs here, make sure they register event watchers as long |
871 | ... as they still have work to do (even an idle watcher will do..) |
871 | ... as they still have work to do (even an idle watcher will do..) |
872 | ev_run (my_loop, 0); |
872 | ev_run (my_loop, 0); |
873 | ... jobs done or somebody called unloop. yeah! |
873 | ... jobs done or somebody called break. yeah! |
874 | |
874 | |
875 | =item ev_break (loop, how) |
875 | =item ev_break (loop, how) |
876 | |
876 | |
877 | Can be used to make a call to C<ev_run> return early (but only after it |
877 | Can be used to make a call to C<ev_run> return early (but only after it |
878 | has processed all outstanding events). The C<how> argument must be either |
878 | has processed all outstanding events). The C<how> argument must be either |
… | |
… | |
3188 | atexit (program_exits); |
3188 | atexit (program_exits); |
3189 | |
3189 | |
3190 | |
3190 | |
3191 | =head2 C<ev_async> - how to wake up an event loop |
3191 | =head2 C<ev_async> - how to wake up an event loop |
3192 | |
3192 | |
3193 | In general, you cannot use an C<ev_run> from multiple threads or other |
3193 | In general, you cannot use an C<ev_loop> from multiple threads or other |
3194 | asynchronous sources such as signal handlers (as opposed to multiple event |
3194 | asynchronous sources such as signal handlers (as opposed to multiple event |
3195 | loops - those are of course safe to use in different threads). |
3195 | loops - those are of course safe to use in different threads). |
3196 | |
3196 | |
3197 | Sometimes, however, you need to wake up an event loop you do not control, |
3197 | Sometimes, however, you need to wake up an event loop you do not control, |
3198 | for example because it belongs to another thread. This is what C<ev_async> |
3198 | for example because it belongs to another thread. This is what C<ev_async> |
… | |
… | |
3308 | trust me. |
3308 | trust me. |
3309 | |
3309 | |
3310 | =item ev_async_send (loop, ev_async *) |
3310 | =item ev_async_send (loop, ev_async *) |
3311 | |
3311 | |
3312 | Sends/signals/activates the given C<ev_async> watcher, that is, feeds |
3312 | Sends/signals/activates the given C<ev_async> watcher, that is, feeds |
3313 | an C<EV_ASYNC> event on the watcher into the event loop. Unlike |
3313 | an C<EV_ASYNC> event on the watcher into the event loop, and instantly |
|
|
3314 | returns. |
|
|
3315 | |
3314 | C<ev_feed_event>, this call is safe to do from other threads, signal or |
3316 | Unlike C<ev_feed_event>, this call is safe to do from other threads, |
3315 | similar contexts (see the discussion of C<EV_ATOMIC_T> in the embedding |
3317 | signal or similar contexts (see the discussion of C<EV_ATOMIC_T> in the |
3316 | section below on what exactly this means). |
3318 | embedding section below on what exactly this means). |
3317 | |
3319 | |
3318 | Note that, as with other watchers in libev, multiple events might get |
3320 | Note that, as with other watchers in libev, multiple events might get |
3319 | compressed into a single callback invocation (another way to look at this |
3321 | compressed into a single callback invocation (another way to look at this |
3320 | is that C<ev_async> watchers are level-triggered, set on C<ev_async_send>, |
3322 | is that C<ev_async> watchers are level-triggered, set on C<ev_async_send>, |
3321 | reset when the event loop detects that). |
3323 | reset when the event loop detects that). |
… | |
… | |
3547 | // now associate this with the loop |
3549 | // now associate this with the loop |
3548 | ev_set_userdata (EV_A_ u); |
3550 | ev_set_userdata (EV_A_ u); |
3549 | ev_set_invoke_pending_cb (EV_A_ l_invoke); |
3551 | ev_set_invoke_pending_cb (EV_A_ l_invoke); |
3550 | ev_set_loop_release_cb (EV_A_ l_release, l_acquire); |
3552 | ev_set_loop_release_cb (EV_A_ l_release, l_acquire); |
3551 | |
3553 | |
3552 | // then create the thread running ev_loop |
3554 | // then create the thread running ev_run |
3553 | pthread_create (&u->tid, 0, l_run, EV_A); |
3555 | pthread_create (&u->tid, 0, l_run, EV_A); |
3554 | } |
3556 | } |
3555 | |
3557 | |
3556 | The callback for the C<ev_async> watcher does nothing: the watcher is used |
3558 | The callback for the C<ev_async> watcher does nothing: the watcher is used |
3557 | solely to wake up the event loop so it takes notice of any new watchers |
3559 | solely to wake up the event loop so it takes notice of any new watchers |