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Revision 1.426 by root, Sat Feb 23 23:06:40 2013 UTC vs.
Revision 1.430 by root, Tue Oct 29 12:13:37 2013 UTC

1=encoding utf-8
2
1=head1 NAME 3=head1 NAME
2 4
3libev - a high performance full-featured event loop written in C 5libev - a high performance full-featured event loop written in C
4 6
5=head1 SYNOPSIS 7=head1 SYNOPSIS
396 398
397If this flag bit is or'ed into the flag value (or the program runs setuid 399If 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 400or setgid) then libev will I<not> look at the environment variable
399C<LIBEV_FLAGS>. Otherwise (the default), this environment variable will 401C<LIBEV_FLAGS>. Otherwise (the default), this environment variable will
400override the flags completely if it is found in the environment. This is 402override 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 403useful to try out specific backends to test their performance, to work
402around bugs. 404around bugs, or to make libev threadsafe (accessing environment variables
405cannot be done in a threadsafe way, but usually it works if no other
406thread modifies them).
403 407
404=item C<EVFLAG_FORKCHECK> 408=item C<EVFLAG_FORKCHECK>
405 409
406Instead of calling C<ev_loop_fork> manually after a fork, you can also 410Instead 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. 411make libev check for a fork in each iteration by enabling this flag.
684reinitialise the kernel state for backends that have one. Despite the 688reinitialise the kernel state for backends that have one. Despite the
685name, you can call it anytime, but it makes most sense after forking, in 689name, you can call it anytime, but it makes most sense after forking, in
686the child process. You I<must> call it (or use C<EVFLAG_FORKCHECK>) in the 690the child process. You I<must> call it (or use C<EVFLAG_FORKCHECK>) in the
687child before resuming or calling C<ev_run>. 691child before resuming or calling C<ev_run>.
688 692
689Again, you I<have> to call it on I<any> loop that you want to re-use after 693Again, you I<have> to call it on I<any> loop that you want to re-use after
690a fork, I<even if you do not plan to use the loop in the parent>. This is 694a fork, I<even if you do not plan to use the loop in the parent>. This is
691because some kernel interfaces *cough* I<kqueue> *cough* do funny things 695because some kernel interfaces *cough* I<kqueue> *cough* do funny things
692during fork. 696during fork.
693 697
694On the other hand, you only need to call this function in the child 698On the other hand, you only need to call this function in the child
3980Libev comes with some simplistic wrapper classes for C++ that mainly allow 3984Libev comes with some simplistic wrapper classes for C++ that mainly allow
3981you to use some convenience methods to start/stop watchers and also change 3985you to use some convenience methods to start/stop watchers and also change
3982the callback model to a model using method callbacks on objects. 3986the callback model to a model using method callbacks on objects.
3983 3987
3984To use it, 3988To use it,
3985 3989
3986 #include <ev++.h> 3990 #include <ev++.h>
3987 3991
3988This automatically includes F<ev.h> and puts all of its definitions (many 3992This automatically includes F<ev.h> and puts all of its definitions (many
3989of them macros) into the global namespace. All C++ specific things are 3993of them macros) into the global namespace. All C++ specific things are
3990put into the C<ev> namespace. It should support all the same embedding 3994put into the C<ev> namespace. It should support all the same embedding
5427=over 4 5431=over 4
5428 5432
5429=item C<EV_COMPAT3> backwards compatibility mechanism 5433=item C<EV_COMPAT3> backwards compatibility mechanism
5430 5434
5431The backward compatibility mechanism can be controlled by 5435The backward compatibility mechanism can be controlled by
5432C<EV_COMPAT3>. See L</PREPROCESSOR SYMBOLS/MACROS> in the L</EMBEDDING> 5436C<EV_COMPAT3>. See L</"PREPROCESSOR SYMBOLS/MACROS"> in the L</EMBEDDING>
5433section. 5437section.
5434 5438
5435=item C<ev_default_destroy> and C<ev_default_fork> have been removed 5439=item C<ev_default_destroy> and C<ev_default_fork> have been removed
5436 5440
5437These calls can be replaced easily by their C<ev_loop_xxx> counterparts: 5441These calls can be replaced easily by their C<ev_loop_xxx> counterparts:

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