--- libev/ev.pod 2008/03/08 10:38:40 1.135 +++ libev/ev.pod 2008/04/02 05:51:40 1.139 @@ -277,6 +277,10 @@ If you don't know what event loop to use, use the one returned from this function. +Note that this function is I thread-safe, so if you want to use it +from multiple threads, you have to lock (note also that this is unlikely, +as loops cannot bes hared easily between threads anyway). + The default loop is the only loop that can handle C and C watchers, and to do this, it always registers a handler for C. If this is a problem for your app you can either @@ -468,6 +472,10 @@ handle signal and child watchers, and attempts to do so will be greeted by undefined behaviour (or a failed assertion if assertions are enabled). +Note that this function I thread-safe, and the recommended way to use +libev with threads is indeed to create one loop per thread, and using the +default loop in the "main" or "initial" thread. + Example: Try to create a event loop that uses epoll and nothing else. struct ev_loop *epoller = ev_loop_new (EVBACKEND_EPOLL | EVFLAG_NOENV); @@ -1087,6 +1095,18 @@ enable C, or resort to C or C. +=head3 The special problem of SIGPIPE + +While not really specific to libev, it is easy to forget about SIGPIPE: +when reading from a pipe whose other end has been closed, your program +gets send a SIGPIPE, which, by default, aborts your program. For most +programs this is sensible behaviour, for daemons, this is usually +undesirable. + +So when you encounter spurious, unexplained daemon exits, make sure you +ignore SIGPIPE (and maybe make sure you log the exit status of your daemon +somewhere, as that would have given you a big clue). + =head3 Watcher-Specific Functions @@ -1602,6 +1622,17 @@ usually detected immediately, and if the file exists there will be no polling. +=head3 ABI Issues (Largefile Support) + +Libev by default (unless the user overrides this) uses the default +compilation environment, which means that on systems with optionally +disabled large file support, you get the 32 bit version of the stat +structure. When using the library from programs that change the ABI to +use 64 bit file offsets the programs will fail. In that case you have to +compile libev with the same flags to get binary compatibility. This is +obviously the case with any flags that change the ABI, but the problem is +most noticably with ev_stat and largefile support. + =head3 Inotify When C support has been compiled into libev (generally only @@ -2511,6 +2542,41 @@ }; +=head1 OTHER LANGUAGE BINDINGS + +Libev does not offer other language bindings itself, but bindings for a +numbe rof languages exist in the form of third-party packages. If you know +any interesting language binding in addition to the ones listed here, drop +me a note. + +=over 4 + +=item Perl + +The EV module implements the full libev API and is actually used to test +libev. EV is developed together with libev. Apart from the EV core module, +there are additional modules that implement libev-compatible interfaces +to C (C), C (C) and the +C event core (C and C). + +It can be found and installed via CPAN, its homepage is found at +L. + +=item Ruby + +Tony Arcieri has written a ruby extension that offers access to a subset +of the libev API and adds filehandle abstractions, asynchronous DNS and +more on top of it. It can be found via gem servers. Its homepage is at +L. + +=item D + +Leandro Lucarella has written a D language binding (F) for libev, to +be found at L. + +=back + + =head1 MACRO MAGIC Libev can be compiled with a variety of options, the most fundamantal