ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.pod
(Generate patch)

Comparing libev/ev.pod (file contents):
Revision 1.322 by root, Sun Oct 24 17:58:41 2010 UTC vs.
Revision 1.327 by root, Sun Oct 24 20:05:43 2010 UTC

342Example: Restrict libev to the select and poll backends, and do not allow 342Example: Restrict libev to the select and poll backends, and do not allow
343environment settings to be taken into account: 343environment settings to be taken into account:
344 344
345 ev_default_loop (EVBACKEND_POLL | EVBACKEND_SELECT | EVFLAG_NOENV); 345 ev_default_loop (EVBACKEND_POLL | EVBACKEND_SELECT | EVFLAG_NOENV);
346 346
347Example: Use whatever libev has to offer, but make sure that kqueue is
348used if available (warning, breaks stuff, best use only with your own
349private event loop and only if you know the OS supports your types of
350fds):
351
352 ev_default_loop (ev_recommended_backends () | EVBACKEND_KQUEUE);
353
354=item struct ev_loop *ev_loop_new (unsigned int flags) 347=item struct ev_loop *ev_loop_new (unsigned int flags)
355 348
356This will create and initialise a new event loop object. If the loop 349This will create and initialise a new event loop object. If the loop
357could not be initialised, returns false. 350could not be initialised, returns false.
358 351
589Example: Try to create a event loop that uses epoll and nothing else. 582Example: Try to create a event loop that uses epoll and nothing else.
590 583
591 struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); 584 struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV);
592 if (!epoller) 585 if (!epoller)
593 fatal ("no epoll found here, maybe it hides under your chair"); 586 fatal ("no epoll found here, maybe it hides under your chair");
587
588Example: Use whatever libev has to offer, but make sure that kqueue is
589used if available.
590
591 struct ev_loop *loop = ev_loop_new (ev_recommended_backends () | EVBACKEND_KQUEUE);
594 592
595=item ev_loop_destroy (loop) 593=item ev_loop_destroy (loop)
596 594
597Destroys an event loop object (frees all memory and kernel state 595Destroys an event loop object (frees all memory and kernel state
598etc.). None of the active event watchers will be stopped in the normal 596etc.). None of the active event watchers will be stopped in the normal
1114=item C<EV_FORK> 1112=item C<EV_FORK>
1115 1113
1116The event loop has been resumed in the child process after fork (see 1114The event loop has been resumed in the child process after fork (see
1117C<ev_fork>). 1115C<ev_fork>).
1118 1116
1117=item C<EV_CLEANUP>
1118
1119The event loop is abotu to be destroyed (see C<ev_cleanup>).
1120
1119=item C<EV_ASYNC> 1121=item C<EV_ASYNC>
1120 1122
1121The given async watcher has been asynchronously notified (see C<ev_async>). 1123The given async watcher has been asynchronously notified (see C<ev_async>).
1122 1124
1123=item C<EV_CUSTOM> 1125=item C<EV_CUSTOM>
3092 3094
3093=head3 Watcher-Specific Functions and Data Members 3095=head3 Watcher-Specific Functions and Data Members
3094 3096
3095=over 4 3097=over 4
3096 3098
3097=item ev_fork_init (ev_signal *, callback) 3099=item ev_fork_init (ev_fork *, callback)
3098 3100
3099Initialises and configures the fork watcher - it has no parameters of any 3101Initialises and configures the fork watcher - it has no parameters of any
3100kind. There is a C<ev_fork_set> macro, but using it is utterly pointless, 3102kind. There is a C<ev_fork_set> macro, but using it is utterly pointless,
3101believe me. 3103believe me.
3102 3104
3103=back 3105=back
3106
3107
3108=head2 C<ev_cleanup> - even the best things end
3109
3110Cleanup watchers are called just before the event loop they are registered
3111with is being destroyed.
3112
3113While there is no guarantee that the event loop gets destroyed, cleanup
3114watchers provide a convenient method to install cleanup hooks for your
3115program, worker threads and so on - you just to make sure to destroy the
3116loop when you want them to be invoked.
3117
3118Cleanup watchers are invoked in the same way as any other watcher. Unlike
3119all other watchers, they do not keep a reference to the event loop (which
3120makes a lot of sense if you think about it). Like all other watchers, you
3121can call libev functions in the callback, except C<ev_cleanup_start>.
3122
3123=head3 Watcher-Specific Functions and Data Members
3124
3125=over 4
3126
3127=item ev_cleanup_init (ev_cleanup *, callback)
3128
3129Initialises and configures the cleanup watcher - it has no parameters of
3130any kind. There is a C<ev_cleanup_set> macro, but using it is utterly
3131pointless, believe me.
3132
3133=back
3134
3135Example: Register an atexit handler to destroy the default loop, so any
3136cleanup functions are called.
3137
3138 static void
3139 program_exits (void)
3140 {
3141 ev_loop_destroy (EV_DEFAULT_UC);
3142 }
3143
3144 ...
3145 atexit (program_exits);
3104 3146
3105 3147
3106=head2 C<ev_async> - how to wake up an event loop 3148=head2 C<ev_async> - how to wake up an event loop
3107 3149
3108In general, you cannot use an C<ev_run> from multiple threads or other 3150In general, you cannot use an C<ev_run> from multiple threads or other
4842 4884
4843=item C<ev_default_destroy> and C<ev_default_fork> have been removed 4885=item C<ev_default_destroy> and C<ev_default_fork> have been removed
4844 4886
4845These calls can be replaced easily by their C<ev_loop_xxx> counterparts: 4887These calls can be replaced easily by their C<ev_loop_xxx> counterparts:
4846 4888
4847 ev_loop_destroy (EV_DEFAULT); 4889 ev_loop_destroy (EV_DEFAULT_UC);
4848 ev_loop_fork (EV_DEFAULT); 4890 ev_loop_fork (EV_DEFAULT);
4849 4891
4850=item function/symbol renames 4892=item function/symbol renames
4851 4893
4852A number of functions and symbols have been renamed: 4894A number of functions and symbols have been renamed:

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines