diff options
Diffstat (limited to 'ev.3')
| -rw-r--r-- | ev.3 | 33 |
1 files changed, 28 insertions, 5 deletions
@@ -129,7 +129,7 @@ .\" ======================================================================== .\" .IX Title ""<STANDARD INPUT>" 1" -.TH "<STANDARD INPUT>" 1 "2007-12-07" "perl v5.8.8" "User Contributed Perl Documentation" +.TH "<STANDARD INPUT>" 1 "2007-12-08" "perl v5.8.8" "User Contributed Perl Documentation" .SH "NAME" libev \- a high performance full\-featured event loop written in C .SH "SYNOPSIS" @@ -891,8 +891,9 @@ it. Returns a true value iff the watcher is pending, (i.e. it has outstanding events but its callback has not yet been invoked). As long as a watcher is pending (but not active) you must not call an init function on it (but -\&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe) and you must make sure the watcher is available to -libev (e.g. you cnanot \f(CW\*(C`free ()\*(C'\fR it). +\&\f(CW\*(C`ev_TYPE_set\*(C'\fR is safe), you must not change its priority, and you must +make sure the watcher is available to libev (e.g. you cannot \f(CW\*(C`free ()\*(C'\fR +it). .IP "callback ev_cb (ev_TYPE *watcher)" 4 .IX Item "callback ev_cb (ev_TYPE *watcher)" Returns the callback currently set on the watcher. @@ -920,12 +921,25 @@ watchers on the same event and make sure one is called first. If you need to suppress invocation when higher priority events are pending you need to look at \f(CW\*(C`ev_idle\*(C'\fR watchers, which provide this functionality. .Sp +You \fImust not\fR change the priority of a watcher as long as it is active or +pending. +.Sp The default priority used by watchers when no priority has been set is always \f(CW0\fR, which is supposed to not be too high and not be too low :). .Sp Setting a priority outside the range of \f(CW\*(C`EV_MINPRI\*(C'\fR to \f(CW\*(C`EV_MAXPRI\*(C'\fR is fine, as long as you do not mind that the priority value you query might or might not have been adjusted to be within valid range. +.IP "ev_invoke (loop, ev_TYPE *watcher, int revents)" 4 +.IX Item "ev_invoke (loop, ev_TYPE *watcher, int revents)" +Invoke the \f(CW\*(C`watcher\*(C'\fR with the given \f(CW\*(C`loop\*(C'\fR and \f(CW\*(C`revents\*(C'\fR. Neither +\&\f(CW\*(C`loop\*(C'\fR nor \f(CW\*(C`revents\*(C'\fR need to be valid as long as the watcher callback +can deal with that fact. +.IP "int ev_clear_pending (loop, ev_TYPE *watcher)" 4 +.IX Item "int ev_clear_pending (loop, ev_TYPE *watcher)" +If the watcher is pending, this function returns clears its pending status +and returns its \f(CW\*(C`revents\*(C'\fR bitset (as if its callback was invoked). If the +watcher isn't pending it does nothing and returns \f(CW0\fR. .Sh "\s-1ASSOCIATING\s0 \s-1CUSTOM\s0 \s-1DATA\s0 \s-1WITH\s0 A \s-1WATCHER\s0" .IX Subsection "ASSOCIATING CUSTOM DATA WITH A WATCHER" Each watcher has, by default, a member \f(CW\*(C`void *data\*(C'\fR that you can change @@ -1980,13 +1994,22 @@ Example: simple class declaration and watcher initialisation \& ev::io iow; \& iow.set <myclass, &myclass::io_cb> (&obj); .Ve -.IP "w\->set (void (*function)(watcher &w, int), void *data = 0)" 4 -.IX Item "w->set (void (*function)(watcher &w, int), void *data = 0)" +.IP "w\->set<function> (void *data = 0)" 4 +.IX Item "w->set<function> (void *data = 0)" Also sets a callback, but uses a static method or plain function as callback. The optional \f(CW\*(C`data\*(C'\fR argument will be stored in the watcher's \&\f(CW\*(C`data\*(C'\fR member and is free for you to use. .Sp +The prototype of the \f(CW\*(C`function\*(C'\fR must be \f(CW\*(C`void (*)(ev::TYPE &w, int)\*(C'\fR. +.Sp See the method\-\f(CW\*(C`set\*(C'\fR above for more details. +.Sp +Example: +.Sp +.Vb 2 +\& static void io_cb (ev::io &w, int revents) { } +\& iow.set <io_cb> (); +.Ve .IP "w\->set (struct ev_loop *)" 4 .IX Item "w->set (struct ev_loop *)" Associates a different \f(CW\*(C`struct ev_loop\*(C'\fR with this watcher. You can only |