X-Git-Url: https://git.llucax.com/software/libev.git/blobdiff_plain/6fb30a67f78730c733f64429f327e360ea2acaf3..91c2e643914a5e26e943053c60055bb839204d38:/ev.pod diff --git a/ev.pod b/ev.pod index d3d9910..26b1288 100644 --- a/ev.pod +++ b/ev.pod @@ -55,7 +55,7 @@ web page you might find easier to navigate when reading it for the first time: L. Libev is an event loop: you register interest in certain events (such as a -file descriptor being readable or a timeout occuring), and it will manage +file descriptor being readable or a timeout occurring), and it will manage these event sources and provide your program with events. To do this, it must take more or less complete control over your process @@ -333,8 +333,8 @@ need to use non-blocking I/O or other means to avoid blocking when no data Kqueue deserves special mention, as at the time of this writing, it was broken on all BSDs except NetBSD (usually it doesn't work with -anything but sockets and pipes, except on Darwin, where of course its -completely useless). For this reason its not being "autodetected" +anything but sockets and pipes, except on Darwin, where of course it's +completely useless). For this reason it's not being "autodetected" unless you explicitly specify it explicitly in the flags (i.e. using C). @@ -406,9 +406,18 @@ etc.). None of the active event watchers will be stopped in the normal sense, so e.g. C might still return true. It is your responsibility to either stop all watchers cleanly yoursef I calling this function, or cope with the fact afterwards (which is usually -the easiest thing, youc na just ignore the watchers and/or C them +the easiest thing, you can just ignore the watchers and/or C them for example). +Note that certain global state, such as signal state, will not be freed by +this function, and related watchers (such as signal and child watchers) +would need to be stopped manually. + +In general it is not advisable to call this function except in the +rare occasion where you really need to free e.g. the signal handling +pipe fds. If you need dynamically allocated loops it is better to use +C and C). + =item ev_loop_destroy (loop) Like C, but destroys an event loop created by an @@ -462,7 +471,7 @@ Returns the current "event loop time", which is the time the event loop received events and started processing them. This timestamp does not change as long as callbacks are being processed, and this is also the base time used for relative timers. You can treat it as the timestamp of the -event occuring (or more correctly, libev finding out about it). +event occurring (or more correctly, libev finding out about it). =item ev_loop (loop, int flags) @@ -1784,7 +1793,7 @@ Make a single, non-blocking sweep over the embedded loop. This works similarly to C, but in the most apropriate way for embedded loops. -=item struct ev_loop *loop [read-only] +=item struct ev_loop *other [read-only] The embedded event loop. @@ -2133,7 +2142,7 @@ applications. Examples of applications that embed it include the Deliantra Game Server, the EV perl module, the GNU Virtual Private Ethernet (gvpe) and rxvt-unicode. -The goal is to enable you to just copy the neecssary files into your +The goal is to enable you to just copy the necessary files into your source directory without having to change even a single line in them, so you can easily upgrade by simply copying (or having a checked-out copy of libev somewhere in your source tree). @@ -2233,7 +2242,7 @@ If defined to be C<1>, libev will try to detect the availability of the monotonic clock option at both compiletime and runtime. Otherwise no use of the monotonic clock option will be attempted. If you enable this, you usually have to link against librt or something similar. Enabling it when -the functionality isn't available is safe, though, althoguh you have +the functionality isn't available is safe, though, although you have to make sure you link against any libraries where the C function is hiding in (often F<-lrt>). @@ -2243,8 +2252,8 @@ If defined to be C<1>, libev will try to detect the availability of the realtime clock option at compiletime (and assume its availability at runtime if successful). Otherwise no use of the realtime clock option will be attempted. This effectively replaces C by C and will not normally affect correctness. See tzhe note about libraries -in the description of C, though. +(CLOCK_REALTIME, ...)> and will not normally affect correctness. See the +note about libraries in the description of C, though. =item EV_USE_SELECT @@ -2433,11 +2442,36 @@ For example, the perl EV module uses something like this: Can be used to change the callback member declaration in each watcher, and the way callbacks are invoked and set. Must expand to a struct member -definition and a statement, respectively. See the F header file for +definition and a statement, respectively. See the F header file for their default definitions. One possible use for overriding these is to avoid the C as first argument in all cases, or to use method calls instead of plain function calls in C++. +=head2 EXPORTED API SYMBOLS + +If you need to re-export the API (e.g. via a dll) and you need a list of +exported symbols, you can use the provided F files which list +all public symbols, one per line: + + Symbols.ev for libev proper + Symbols.event for the libevent emulation + +This can also be used to rename all public symbols to avoid clashes with +multiple versions of libev linked together (which is obviously bad in +itself, but sometimes it is inconvinient to avoid this). + +A sed command like this will create wrapper C<#define>'s that you need to +include before including F: + + wrap.h + +This would create a file F which essentially looks like this: + + #define ev_backend myprefix_ev_backend + #define ev_check_start myprefix_ev_check_start + #define ev_check_stop myprefix_ev_check_stop + ... + =head2 EXAMPLES For a real-world example of a program the includes libev