*
* @section Introduction
*
- * The <a href="http://monkey.org/~provos/libevent/">libevent</a> API provides
- * a mechanism to execute a callback function when a specific event occurs on
- * a file descriptor or after a timeout has been reached. Furthermore, libevent
- * also support callbacks due to signals or regular timeouts.
- *
- * libevent is meant to replace the event loop found in event driven network
- * servers. An application just needs to call dispatcher::dispatch() and then
- * add or remove events dynamically without having to change the event loop.
- *
- * Currently, libevent supports /dev/poll, kqueue(2), select(2), poll(2) and
- * epoll(4). It also has experimental support for real-time signals. The
- * internal event mechanism is completely independent of the exposed event API,
- * and a simple update of libevent can provide new functionality without having
- * to redesign the applications. As a result, Libevent allows for portable
- * application development and provides the most scalable event notification
- * mechanism available on an operating system. Libevent should compile on Linux,
- * *BSD, Mac OS X, Solaris and Windows.
- *
- * This is a simple, direct, one-header inline C++ wrapper for libevent. Yes,
- * it's just one header file, so if you want to use it you can just copy the
- * file to your project and you are set.
- *
- * It's designed to be as close to use to libevent (without compromising modern
- * C++ programming techniques) and efficiency (since all implementation is
- * trivial and inline, theoretically, it imposes no overhead at all).
- *
- * Please, visit the <a href="http://www.llucax.com.ar/~luca/eventxx/">eventxx
- * website</a> for the latest documentation.
- *
- * You can always <a href="http://www.lluca.com.ar/~lucax/repos/eventxx/">get
- * the most up to date sources</a> from the
- * <a href="http://www.darcs.net/">darcs</a>.
+ * @libevent is a popular API that provides a mechanism to execute a callback
+ * function when a specific event occurs on a file descriptor or after a
+ * timeout has been reached. Furthermore, @libevent also support callbacks due
+ * to signals or regular timeouts.
+ *
+ * @eventxx is a simple, direct, one-header inline C++ wrapper for @libevent.
+ * Yes, it's just one header file, so if you want to use it you can just copy
+ * the file to your project and you are set (well, you'll need to link to
+ * @libevent too ;). I know @eventxx will work with @libevent 1.1 and 1.2 if you
+ * use the @c event_base_free() fix (see \ref Status section for more details).
+ *
+ * It's designed to be as close to use to @libevent (without compromising
+ * modern C++ programming techniques) and efficient (since all implementation
+ * is trivial and inline, theoretically, it imposes no overhead at all) as
+ * possible.
+ *
+ * Please, visit the @eventxx website for the latest version of this
+ * documentation.
+ *
+ * You can always get the <a
+ * href="http://www.llucax.com.ar/~luca/eventxx/releases/eventxx.tar.gz">current
+ * release</a> from the
+ * <a href="http://www.llucax.com.ar/~luca/eventxx/releases/">release
+ * directory</a> or grab the
+ * <a href="http://www.llucax.com.ar/~luca/repos/eventxx/">most up to date
+ * sources</a> from the <a href="http://www.darcs.net/">darcs</a> repository.
*
* You can also take a look the the <a
* href="http://auriga.wearlab.de/~alb/darcsweb/">darcsweb</a> interface to see
* the <a href="http://www.llucax.com.ar/~luca/repos/darcsweb/?r=eventxx">latest
- * changes online</a>.
+ * changes online</a> or subscribe to its
+ * <a href="http://www.llucax.com.ar/~luca/repos/darcsweb/?r=eventxx;a=rss">RSS
+ * feed</a> to follow the development.
*
*
* @section Usage
*
- * This wrapper was designed to be used just like libevent, but with C++ style
- * syntax sugar (or poisson, depends on your point of view ;) and goodies. The
- * main difference to libevent is you allways have to instance a
+ * You probably should read @libevent documentation to get started or at least
+ * just for reference, although @eventxx is pretty simple so you can jump right
+ * into the \ref Example section (or the example list) and write a working
+ * program without much trouble.
+ *
+ * This wrapper was designed to be used just like @libevent, but with C++ style
+ * syntax sugar (or poison, depends on your point of view ;) and goodies. The
+ * main difference to libevent is you always have to instance a
* eventxx::dispatcher to get an event loop. There is no implicit global event
* loop. This adds just an extra line of code for single threaded applications
- * and makes things much more simple. See eventxx::dispatcher documentation for
- * more details.
+ * and makes things much more simple, so I hope nobody complains about it ;).
+ * See eventxx::dispatcher documentation for more details.
*
- * You can use use the same plain functions callbacks or the other kind of
- * function objects (see @link events @endlink section for details on event
+ * You can use use the same plain functions callbacks @libevent use or the other
+ * kind of function objects (see @ref events section for details on event
* types).
*
- * eventxx uses @link exceptions @endlink to report errors. All functions has
- * exception specifications, so it's easy to find out what to expect. See
- * exceptions section for more detail.
+ * @eventxx uses @ref exceptions to report errors. All functions has exception
+ * specifications, so it's easy to find out what to expect. See @ref exceptions
+ * section for more detail.
*
- * A timespec abstraction is provided in eventxx::time for convenient argument
- * passing. Even more, it's a timespec itself, with some convenient methods for
- * accessing the timespec attributes in a more C++ way. And even more, eventxx
- * is such a direct mapping that all eventxx::event's are libevent event structs
- * too, so theoretically you can pass a eventxx::event to libevent C functions
- * without much trouble. eventxx::dispatcher is the only class that is not
- * derived from libevent struct (event_base) because this struct it's not
- * defined on the libevent header (just declared).
+ * A @c timespec abstraction is provided as eventxx::time for convenient
+ * argument passing. Even more, it's a @c timespec itself, with some convenient
+ * methods for accessing the attributes with pritier names. And even more,
+ * @eventxx is such a direct mapping that all eventxx::event's are @libevent
+ * event structs too, so theoretically you can pass a eventxx::event to
+ * @libevent C functions without much trouble. eventxx::dispatcher is the only
+ * class that is not derived from @libevent struct (@c event_base) because this
+ * struct it's not defined on the libevent header (just declared).
*
* Maybe you shouldn't know this implementation details to keep the abstraction,
* but this is a basic design goal of this wrapper so there is not much chance
* that this changes in the future (but use this knowledge with care, you are
* warned ;).
*
+ *
* @section Example
*
* @code
* @section Status
*
* This library was not widely used yet, it lack some testing. Because templates
- * are not even compiled when they are used, you can be surprissed if you catch
- * a piece of code that didn't got even compiled yet because the lack of
- * testing. The library has no support for buffered events yet either. It
- * doesn't support the http stuff, and probably never will because that has
- * nothing to do with event handling.
- *
- * If you notice this lib leaks memory, don't blame me, blame libevent :)
- * libevent has a known bug on event_base_free() that makes it assert always, so
- * event_base_free() it's unusable, unless you patch your libevent (for example,
- * using this <a
+ * are not even compiled when they are not used, don't be surprised if you catch
+ * a piece of code that don't even compiled yet because the lack of testing. The
+ * library has no support for buffered events yet either. It doesn't support the
+ * http stuff, and probably never will because that has nothing to do with event
+ * handling.
+ *
+ * If you notice that when using @eventxx your program leaks some memory, don't
+ * blame me, blame @libevent :) @libevent has a known bug on @c event_base_free()
+ * that makes it assert always, so @c event_base_free() it's unusable, unless you
+ *
patch your libevent (for example, using this <a
* href="http://monkeymail.org/archives/libevent-users/2006-April/000141.html">patch</a>
- * written by Mark D. Anderson and who knows why it's not still applied. If you
- * do so, you can compile your programs with -DEVENT_BASE_FREE_FIX so
- * event_base_free() gets called.
- *
- * That said, I think it's pretty usable anyways. If something is broken it
- * would be really easy to fix it because is just a simple wrapper arround
- * libevent. So, please try it out, and if you have any problems,
+ * written by Mark D. Anderson, and who knows why it's not still applied. If you
+ * do so, you can compile your programs with @c -DEVENT_BASE_FREE_FIX so
+ * @c event_base_free() gets called in the eventxx::dispatcher @link
+ * eventxx::dispatcher::~dispatcher() destructor @endlink.
+ *
+ * That said, I think it's still pretty usable anyways. If something is broken
+ * it would be really easy to fix it because is just a simple wrapper around
+ * @libevent. So, please try it out, and if you have any problems,
* <a href="mailto:llucax+eventxx@gmail.com">drop me an
* e-mail</a> and and I'll fix it ASAP (or provide a patch and you will be my
* best friend ;).
*
* @par License
* This program is under the BOLA license (see
- * http://auriga.wearlab.de/~alb/bola/ for more info or the
+ * http://auriga.wearlab.de/~alb/bola/ for more details or read the
* <a href="http://www.llucax.com.ar/~luca/repos/eventxx/LICENSE">LICENSE</a>
- * file itself).
+ * file itself, it's very short and it basically says it's Public Domain).
*
*/
/** @example c-way.cpp
*
- * This is a simple example ilustrating the usage with C-like callback
+ * This is a simple example illustrating the usage with C-like callback
* functions.
*/
/** @example functor-way.cpp
*
- * This is a simple example ilustrating the usage with function object
+ * This is a simple example illustrating the usage with function object
* callbacks.
*/
/** @example mixed-way.cpp
*
- * This is a simple example ilustrating the usage with a mix of C-like callbacks
+ * This is a simple example illustrating the usage with a mix of C-like callbacks
* and function object callbacks.
*/
/** @example prio-test.cpp
*
- * This is a priotity usage example.
+ * This is a priority usage example.
*/
/** @example test-time.cpp
*
- * This is a timer usage example.
+ * This is a timer usage example ported from libevent.
*/
-/** @example test-weof.cpp
+/** @example test-eof.cpp
*
* This is some kind of test of EOF ported from libevent.
*/
+/** @example test-weof.cpp
+ *
+ * Another test of EOF ported from libevent.
+ */
+
/** @example trivial.cpp
*
* This is the most trivial example.
* Invalid priority exception.
*
* This exception is thrown when passing an invalid priority to a function. This
- * usually means you don't have enought priority queues in your dispatcher, so
+ * usually means you don't have enough priority queues in your dispatcher, so
* you should have allocated more in the constructor.
*
* If you hit this exception, you probably got a programming error.
//@}
-/// Miscelaneous constants
+/// Miscellaneous constants
enum
{
DEFAULT_PRIORITY = -1, ///< Default priority (the middle value).
/**
* Generic event object.
*
- * This object stores all the information about an event, incluiding a callback
+ * This object stores all the information about an event, including a callback
* functor, which is called when the event is fired. The template parameter
* must be a functor (callable object or function) that can take 2 parameters:
* an integer (the file descriptor of the fired event) and an event::type (the
* type of event being fired).
* There is a specialized version of this class which takes as the template
- * parameter a C function with the ccallback_type signature, just like C
- * libevent API does.
+ * parameter a C function with the eventxx::ccallback_type signature, just like
+ * C @libevent API does.
*
* @see eventxx::event< ccallback_type >
*/
{
/**
- * Creates a new singal event.
+ * Creates a new signal event.
*
* @param signum Signal number to monitor.
* @param handler Callback functor.
/**
* Event dispatcher.
*
- * This class is the responsable for looping and dispatching events. Everytime
+ * This class is the responsible for looping and dispatching events. Every time
* you need an event loop you should create an instance of this class.
*
* You can @link dispatcher::add add @endlink events to the dispatcher, and you
*/
dispatcher() throw()
{
- _event_base = static_cast< internal::event_base* >(internal::event_init());
+ _event_base = static_cast< internal::event_base* >(
+ internal::event_init());
}
/**
*/
dispatcher(int npriorities) throw(std::bad_alloc)
{
- _event_base = static_cast< internal::event_base* >(internal::event_init());
+ _event_base = static_cast< internal::event_base* >(
+ internal::event_init());
if (!_event_base) throw std::bad_alloc();
// Can't fail because there is no way that it has active events
internal::event_base_priority_init(_event_base, npriorities);
}
#ifdef EVENT_BASE_FREE_FIX
+ /// Free dispatcher resources, see @ref Status section for details.
~dispatcher() throw() { event_base_free(_event_base); }
#else
-#warning "The dispatcher class *will* leak memory because of a libevent bug, see http://www.mail-archive.com/libevent-users@monkey.org/msg00110.html for more info an a patch. If you already have this patch, please -DEVENT_BASE_FREE_FIX to your compiler to make this message disappear and really free the dispatcher memory using event_base_free()."
+#warning "The dispatcher class *will* leak memory because of a libevent bug, " \
+ "see http://www.mail-archive.com/libevent-users@monkey.org/msg00110.html " \
+ "for more info an a patch. If you already have this patch, please " \
+ "-DEVENT_BASE_FREE_FIX to your compiler to make this message disappear " \
+ "and really free the dispatcher memory using event_base_free()."
#endif
/**
if (priority != DEFAULT_PRIORITY
&& internal::event_priority_set(&e, priority))
throw invalid_priority();
- internal::event_add(&e, const_cast< time* >(&to)); // XXX HACK libevent don't use const
+ // XXX HACK libevent don't use const
+ internal::event_add(&e, const_cast< time* >(&to));
}
/**
{
internal::event_once(fd, ev, &dispatcher::wrapper< F >,
reinterpret_cast< void* >(&handler),
- const_cast< time* >(&to)); // XXX HACK libevent don't use const
+ // XXX HACK libevent don't use const
+ const_cast< time* >(&to));
}
/**
* @param arg Arbitrary pointer to pass to the handler as argument.
* @param to Timeout.
*/
- void add_once(int fd, type ev, ccallback_type handler, void* arg, const time& to)
+ void add_once(int fd, type ev, ccallback_type handler, void* arg,
+ const time& to)
{
- internal::event_once(fd, ev, handler, arg, const_cast< time* >(&to)); // XXX HACK libevent don't use const
+ internal::event_once(fd, ev, handler, arg,
+ // XXX HACK libevent don't use const
+ const_cast< time* >(&to));
}
/**
{
internal::event_once(-1, EV_TIMEOUT, &dispatcher::wrapper< F >,
reinterpret_cast< void* >(&handler),
- const_cast< time* >(&to)); // XXX HACK libevent don't use const
+ // XXX HACK libevent don't use const
+ const_cast< time* >(&to));
}
/**
*/
void add_once_timer(ccallback_type handler, void* arg, const time& to)
{
- internal::event_once(-1, EV_TIMEOUT, handler, arg, const_cast< time* >(&to)); // XXX HACK libevent don't use const
+ // XXX HACK libevent don't use const
+ internal::event_once(-1, EV_TIMEOUT, handler, arg,
+ const_cast< time* >(&to));
}
/**
projects / software / eventxx.git / blobdiff