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Comparing libev/ev.pod (file contents):
Revision 1.423 by root, Fri Nov 23 12:52:35 2012 UTC vs.
Revision 1.427 by root, Sun Apr 28 14:57:12 2013 UTC

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396 396
397If this flag bit is or'ed into the flag value (or the program runs setuid 397If this flag bit is or'ed into the flag value (or the program runs setuid
398or setgid) then libev will I<not> look at the environment variable 398or setgid) then libev will I<not> look at the environment variable
399C<LIBEV_FLAGS>. Otherwise (the default), this environment variable will 399C<LIBEV_FLAGS>. Otherwise (the default), this environment variable will
400override the flags completely if it is found in the environment. This is 400override the flags completely if it is found in the environment. This is
401useful to try out specific backends to test their performance, or to work 401useful to try out specific backends to test their performance, to work
402around bugs. 402around bugs, or to make libev threadsafe (accessing environment variables
403cannot be done in a threadsafe way, but usually it works if no other
404thread modifies them).
403 405
404=item C<EVFLAG_FORKCHECK> 406=item C<EVFLAG_FORKCHECK>
405 407
406Instead of calling C<ev_loop_fork> manually after a fork, you can also 408Instead of calling C<ev_loop_fork> manually after a fork, you can also
407make libev check for a fork in each iteration by enabling this flag. 409make libev check for a fork in each iteration by enabling this flag.
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2606 2608
2607=head2 C<ev_stat> - did the file attributes just change? 2609=head2 C<ev_stat> - did the file attributes just change?
2608 2610
2609This watches a file system path for attribute changes. That is, it calls 2611This watches a file system path for attribute changes. That is, it calls
2610C<stat> on that path in regular intervals (or when the OS says it changed) 2612C<stat> on that path in regular intervals (or when the OS says it changed)
2611and sees if it changed compared to the last time, invoking the callback if 2613and sees if it changed compared to the last time, invoking the callback
2612it did. 2614if it did. Starting the watcher C<stat>'s the file, so only changes that
2615happen after the watcher has been started will be reported.
2613 2616
2614The path does not need to exist: changing from "path exists" to "path does 2617The path does not need to exist: changing from "path exists" to "path does
2615not exist" is a status change like any other. The condition "path does not 2618not exist" is a status change like any other. The condition "path does not
2616exist" (or more correctly "path cannot be stat'ed") is signified by the 2619exist" (or more correctly "path cannot be stat'ed") is signified by the
2617C<st_nlink> field being zero (which is otherwise always forced to be at 2620C<st_nlink> field being zero (which is otherwise always forced to be at
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3177 3180
3178=over 4 3181=over 4
3179 3182
3180=item ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop) 3183=item ev_embed_init (ev_embed *, callback, struct ev_loop *embedded_loop)
3181 3184
3182=item ev_embed_set (ev_embed *, callback, struct ev_loop *embedded_loop) 3185=item ev_embed_set (ev_embed *, struct ev_loop *embedded_loop)
3183 3186
3184Configures the watcher to embed the given loop, which must be 3187Configures the watcher to embed the given loop, which must be
3185embeddable. If the callback is C<0>, then C<ev_embed_sweep> will be 3188embeddable. If the callback is C<0>, then C<ev_embed_sweep> will be
3186invoked automatically, otherwise it is the responsibility of the callback 3189invoked automatically, otherwise it is the responsibility of the callback
3187to invoke it (it will continue to be called until the sweep has been done, 3190to invoke it (it will continue to be called until the sweep has been done,
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4617different cpus (or different cpu cores). This reduces dependencies 4620different cpus (or different cpu cores). This reduces dependencies
4618and makes libev faster. 4621and makes libev faster.
4619 4622
4620=item EV_NO_THREADS 4623=item EV_NO_THREADS
4621 4624
4622If defined to be C<1>, libev will assume that it will never be called 4625If defined to be C<1>, libev will assume that it will never be called from
4623from different threads, which is a stronger assumption than C<EV_NO_SMP>, 4626different threads (that includes signal handlers), which is a stronger
4624above. This reduces dependencies and makes libev faster. 4627assumption than C<EV_NO_SMP>, above. This reduces dependencies and makes
4628libev faster.
4625 4629
4626=item EV_ATOMIC_T 4630=item EV_ATOMIC_T
4627 4631
4628Libev requires an integer type (suitable for storing C<0> or C<1>) whose 4632Libev requires an integer type (suitable for storing C<0> or C<1>) whose
4629access is atomic with respect to other threads or signal contexts. No 4633access is atomic with respect to other threads or signal contexts. No

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