\hypertarget{events_8cpp-example}{}\section{events.\+cpp}
A simple demonstration of using the event system


\begin{DoxyCodeInclude}{0}
\DoxyCodeLine{\textcolor{preprocessor}{\#include <\mbox{\hyperlink{event__handler_8hpp}{libfilezilla/event\_handler.hpp}}>}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{preprocessor}{\#include <iostream>}}
\DoxyCodeLine{\textcolor{preprocessor}{\#include <string>}}
\DoxyCodeLine{\textcolor{preprocessor}{\#include <vector>}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{comment}{// A condition that we'll use in this example to signal the main}}
\DoxyCodeLine{\textcolor{comment}{// thread that the worker has processed the event.}}
\DoxyCodeLine{\mbox{\hyperlink{classfz_1_1condition}{fz::condition}} c;}
\DoxyCodeLine{\mbox{\hyperlink{classfz_1_1mutex}{fz::mutex}} m;}
\DoxyCodeLine{}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{comment}{// Define a new event.}}
\DoxyCodeLine{\textcolor{comment}{// The event is uniquely identified via the incomplete my\_event\_type struct and}}
\DoxyCodeLine{\textcolor{comment}{// has two arguments: A string and a vector of ints.}}
\DoxyCodeLine{\textcolor{keyword}{struct }my\_event\_type;}
\DoxyCodeLine{\textcolor{keyword}{typedef} \mbox{\hyperlink{classfz_1_1simple__event}{fz::simple\_event<my\_event\_type, std::string, std::vector<int>}}> my\_event;}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{comment}{// A simple event handler}}
\DoxyCodeLine{\textcolor{keyword}{class }handler final : \textcolor{keyword}{public} \mbox{\hyperlink{classfz_1_1event__handler}{fz::event\_handler}}}
\DoxyCodeLine{\{}
\DoxyCodeLine{\textcolor{keyword}{public}:}
\DoxyCodeLine{    handler(\mbox{\hyperlink{classfz_1_1event__loop}{fz::event\_loop}}\& l)}
\DoxyCodeLine{        : \mbox{\hyperlink{namespacefz}{fz}}::event\_handler(l)}
\DoxyCodeLine{    \{\}}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{keyword}{virtual} ~handler()}
\DoxyCodeLine{    \{}
\DoxyCodeLine{        \textcolor{comment}{// This \_MUST\_ be called to avoid a race so that operator()(fz::event\_base const\&) is not called on a partially destructed object.}}
\DoxyCodeLine{        \mbox{\hyperlink{classfz_1_1event__handler_a50653cb04de110c658a44cf9eccfa391}{remove\_handler}}();}
\DoxyCodeLine{    \}}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keyword}{private}:}
\DoxyCodeLine{    \textcolor{comment}{// The event loop calls this function for every event sent to this handler.}}
\DoxyCodeLine{    \textcolor{keyword}{virtual} \textcolor{keywordtype}{void} \mbox{\hyperlink{classfz_1_1event__handler_a98f41a1071a9ef5318929178dec7c45c}{operator()}}(\mbox{\hyperlink{classfz_1_1event__base}{fz::event\_base}} \textcolor{keyword}{const}\& ev)}
\DoxyCodeLine{    \{}
\DoxyCodeLine{        \textcolor{comment}{// Dispatch the event to the correct function.}}
\DoxyCodeLine{        fz::dispatch<my\_event>(ev, \textcolor{keyword}{this}, \&handler::on\_my\_event);}
\DoxyCodeLine{    \}}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{keywordtype}{void} on\_my\_event(std::string \textcolor{keyword}{const}\& s, std::vector<int> \textcolor{keyword}{const}\& v)}
\DoxyCodeLine{    \{}
\DoxyCodeLine{        std::cout << \textcolor{stringliteral}{"Received event with text \(\backslash\)""} << s << \textcolor{stringliteral}{"\(\backslash\)" and a vector with "} << v.size() << \textcolor{stringliteral}{" elements"} << std::endl;}
\DoxyCodeLine{}
\DoxyCodeLine{        \textcolor{comment}{// Signal the condition}}
\DoxyCodeLine{        \mbox{\hyperlink{classfz_1_1scoped__lock}{fz::scoped\_lock}} lock(m);}
\DoxyCodeLine{        c.\mbox{\hyperlink{classfz_1_1condition_a93f86ef1fc563f47689777cb987b3b2b}{signal}}(lock);}
\DoxyCodeLine{    \}}
\DoxyCodeLine{\};}
\DoxyCodeLine{}
\DoxyCodeLine{\textcolor{keywordtype}{int} main()}
\DoxyCodeLine{\{}
\DoxyCodeLine{    \textcolor{comment}{// Start an event loop}}
\DoxyCodeLine{    \mbox{\hyperlink{classfz_1_1event__loop}{fz::event\_loop}} l;}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{comment}{// Create a handler}}
\DoxyCodeLine{    handler h(l);}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{comment}{// Send an event to the handler}}
\DoxyCodeLine{    h.send\_event<my\_event>(\textcolor{stringliteral}{"Hello World!"}, std::vector<int>\{23, 42, 666\});}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{comment}{// Wait until a signal from the worker thread}}
\DoxyCodeLine{    \mbox{\hyperlink{classfz_1_1scoped__lock}{fz::scoped\_lock}} lock(m);}
\DoxyCodeLine{    c.\mbox{\hyperlink{classfz_1_1condition_a1d557df085bb788b92afe06ad00423c7}{wait}}(lock);}
\DoxyCodeLine{}
\DoxyCodeLine{    \textcolor{comment}{// All done.}}
\DoxyCodeLine{    \textcolor{keywordflow}{return} 0;}
\DoxyCodeLine{\}}
\end{DoxyCodeInclude}