#include <stdexcept> // std::exception, std::invalid_argument,
// std::runtime_error, std::bad_alloc
-/** @mainpage
- *
- * @section Introduction
- *
- * @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 ;).
- *
- * 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> 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
- *
- * 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 simpler, so I hope nobody complains about it ;).
- * See eventxx::dispatcher documentation for more details.
- *
- * 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 @ref exceptions to report errors. All functions have exception
- * specifications, so it's easy to find out what to expect. See @ref exceptions
- * section for more detail.
- *
- * 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 have
- * been warned ;).
- *
- *
- * @section Example
- *
- * @code
- * #include <eventxx>
- * #include <iostream>
- * #include <csignal>
- *
- * struct handler
- * {
- * eventxx::dispatcher& d;
- * int i;
- * handler(eventxx::dispatcher& d): d(d), i(0) {}
- * void operator() (int signum, eventxx::type event)
- * {
- * if (i < 5) std::cout << "keep going...\n";
- * else
- * {
- * std::cout << "done!\n";
- * d.exit();
- * }
- * }
- * };
- *
- * void sighandler(int signum, short event, void* data)
- * {
- * int& i = *static_cast< int* >(data);
- * std::cout << ++i << " interrupts, ";
- * }
- *
- * int main()
- * {
- * eventxx::dispatcher d;
- * handler h(d);
- * eventxx::csignal sigev(SIGINT, sighandler, &h.i);
- * eventxx::signal< handler > e(SIGINT, h);
- * d.add(sigev);
- * d.add(e);
- * d.dispatch();
- * return 0;
- * }
- * @endcode
- *
- * You can see more examples on the test directory of the distribution or on the
- * examples related page.
- *
- *
- * @section Status
- *
- * This library has not been widely used yet, but it's used in some serious
- * projects, so I think it's moderately stable now. The library has no support
- * for buffered events yet, but patches are welcome. It doesn't support the
- * HTTP stuff, and probably never will because that has nothing to do with
- * event handling.
- *
- * @libevent had a memory leak before version 1.3b (before 1.2 it didn't even
- * had a way free that memory, from version 1.2 to 1.3a, if you tried to free
- * the memory the program @c abort() because a failed assertion). Because of
- * that, there is a way to disable the @link eventxx::dispatcher::~dispatcher()
- * dispatcher destructor @endlink (which calls the inexistent/broken
- * @c event_base_free() function). So if you use a @libevent version previous
- * to 1.3b, you have to compile your programs defining the
- * @c EVENTXX_NO_EVENT_BASE_FREE macro.
- *
- * If something is broken it would be really easy to fix because @eventxx 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 ;).
- *
- * If you use this library, please drop me an e-mail with your thoughts, or
- * simply saying "I use it", so I can keep track of how many people really use
- * it.
- *
- * @author Leandro Lucarella <llucax+eventxx@gmail.com>
- *
- * @version 0.6
- *
- * @par License
- * This program is under the BOLA license (see
- * 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, it's very short and it basically says it's Public Domain).
- *
- */
-
-/** @example c-way.cpp
- *
- * This is a simple example illustrating the usage with C-like callback
- * functions.
- */
-
-/** @example functor-way.cpp
- *
- * This is a simple example illustrating the usage with function object
- * callbacks.
- */
-
-/** @example wrapped-functor-way.cpp
- *
- * This is a simple example illustrating the usage with an arbitrary member
- * function as an event handler callbacks.
- */
-
-/** @example mixed-way.cpp
- *
- * This is a simple example illustrating the usage with a mix of C-like callbacks
- * and function object callbacks.
- */
-
-/** @example bench.cpp
- *
- * This is a benchmark example, extracted from libevent and ported to eventxx.
- */
-
-/** @example prio-test.cpp
- *
- * This is a priority usage example.
- */
-
-/** @example test-time.cpp
- *
- * This is a timer usage example ported from libevent.
- */
-
-/** @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.
- */
-
/**
* Namespace for all symbols libevent C++ wrapper defines.
*/
type operator| (const type& t1, const type& t2)
{
int r = static_cast< int >(t1) | static_cast< int >(t2);
- return *reinterpret_cast< type* >(&r);
+ return static_cast< type >(r);
}
F& handler = *reinterpret_cast< F* >(h);
// Hackish, but this way the handler can get a clean
// event type
- handler(fd, *reinterpret_cast< type* >(&ev));
+ short* pev = &ev; // Avoid some weird warning about
+ // dereferencing type-punned pointer
+ // will break strict-aliasing rules
+ handler(fd, *reinterpret_cast< type* >(pev));
}
}; // struct event< F >
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