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<div class="section" id="using-ringlibuv">
<span id="index-0"></span><h1>Using RingLibuv<a class="headerlink" href="#using-ringlibuv" title="Permalink to this headline">¶</a></h1>
<p>In this chapter we will learn about using RingLibuv</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>To use RingLibuv, Check ring/extensions/ringlibuv folder.</p>
</div>
<p>Information from the library website: <a class="reference external" href="http://libuv.org/">http://libuv.org/</a></p>
<p>Libuv is a multi-platform support library with a focus on asynchronous I/O.</p>
<p>Feature highlights</p>
<ul class="simple">
<li><p>Full-featured event loop backed by epoll, kqueue, IOCP, event ports.</p></li>
<li><p>Asynchronous TCP and UDP sockets</p></li>
<li><p>Asynchronous DNS resolution</p></li>
<li><p>Asynchronous file and file system operations</p></li>
<li><p>File system events</p></li>
<li><p>ANSI escape code controlled TTY</p></li>
<li><p>IPC with socket sharing, using Unix domain sockets or named pipes (Windows)</p></li>
<li><p>Child processes</p></li>
<li><p>Thread pool</p></li>
<li><p>Signal handling</p></li>
<li><p>High resolution clock</p></li>
<li><p>Threading and synchronization primitives</p></li>
</ul>
<div class="section" id="first-application-using-ringlibuv">
<span id="index-1"></span><h2>First Application using RingLibuv<a class="headerlink" href="#first-application-using-ringlibuv" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="k">func</span> <span class="n">main</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="n">new_uv_loop_t</span><span class="p">()</span>
<span class="n">uv_loop_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">)</span>
<span class="o">?</span> <span class="s">"Now quitting"</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">)</span>
<span class="n">uv_loop_close</span><span class="p">(</span><span class="n">myloop</span><span class="p">)</span>
<span class="n">destroy_uv_loop_t</span><span class="p">(</span><span class="n">myloop</span><span class="p">)</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Now quitting
</pre></div>
</div>
</div>
<div class="section" id="the-events-loop">
<span id="index-2"></span><h2>The Events Loop<a class="headerlink" href="#the-events-loop" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="n">counter</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">idler</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="k">func</span> <span class="n">main</span>
<span class="n">idler</span> <span class="o">=</span> <span class="n">new_uv_idle_t</span><span class="p">()</span>
<span class="n">uv_idle_init</span><span class="p">(</span><span class="n">uv_default_loop</span><span class="p">(),</span> <span class="n">idler</span><span class="p">)</span>
<span class="n">uv_idle_start</span><span class="p">(</span><span class="n">idler</span><span class="p">,</span> <span class="s">"wait()"</span><span class="p">)</span>
<span class="o">?</span> <span class="s">"Idling..."</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">uv_default_loop</span><span class="p">(),</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">);</span>
<span class="n">uv_loop_close</span><span class="p">(</span><span class="n">uv_default_loop</span><span class="p">());</span>
<span class="n">destroy_uv_idle_t</span><span class="p">(</span><span class="n">idler</span><span class="p">)</span>
<span class="k">func</span> <span class="n">wait</span>
<span class="n">counter</span><span class="o">++</span>
<span class="k">if</span> <span class="n">counter</span> <span class="o">>=</span> <span class="mi">100000</span>
<span class="n">uv_idle_stop</span><span class="p">(</span><span class="n">idler</span><span class="p">)</span>
<span class="k">ok</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Idling...
</pre></div>
</div>
</div>
<div class="section" id="server-example">
<span id="index-3"></span><h2>Server Example<a class="headerlink" href="#server-example" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Server Side"</span>
<span class="n">DEFAULT_PORT</span> <span class="o">=</span> <span class="mi">13370</span>
<span class="n">DEFAULT_BACKLOG</span> <span class="o">=</span> <span class="mi">1024</span>
<span class="n">addr</span> <span class="o">=</span> <span class="n">new_sockaddr_in</span><span class="p">()</span>
<span class="n">server</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">client</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="k">func</span> <span class="n">main</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="n">uv_default_loop</span><span class="p">()</span>
<span class="n">server</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">server</span><span class="p">)</span>
<span class="n">uv_ip4_addr</span><span class="p">(</span><span class="s">"127.0.0.1"</span><span class="p">,</span> <span class="n">DEFAULT_PORT</span><span class="p">,</span> <span class="n">addr</span><span class="p">)</span>
<span class="n">uv_tcp_bind</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="n">uv_listen</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">DEFAULT_BACKLOG</span><span class="p">,</span> <span class="s">"newconnection()"</span><span class="p">)</span>
<span class="k">if</span> <span class="n">r</span>
<span class="o">?</span> <span class="s">"Listen error "</span> <span class="o">+</span> <span class="n">uv_strerror</span><span class="p">(</span><span class="n">r</span><span class="p">)</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="k">ok</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">)</span>
<span class="n">destroy_uv_tcp_t</span><span class="p">(</span><span class="n">server</span><span class="p">)</span>
<span class="n">destroy_uv_sockaddr_in</span><span class="p">(</span><span class="n">addr</span><span class="p">)</span>
<span class="k">func</span> <span class="n">newconnection</span>
<span class="o">?</span> <span class="s">"New Connection"</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">server</span><span class="p">,:</span><span class="n">connect</span><span class="p">)</span>
<span class="n">nStatus</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nStatus</span> <span class="o"><</span> <span class="mi">0</span>
<span class="o">?</span> <span class="s">"New connection error : "</span> <span class="o">+</span> <span class="n">nStatus</span>
<span class="k">return</span>
<span class="k">ok</span>
<span class="n">client</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">client</span><span class="p">)</span>
<span class="k">if</span> <span class="n">uv_accept</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">client</span><span class="p">)</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">uv_read_start</span><span class="p">(</span><span class="n">client</span><span class="p">,</span> <span class="n">uv_myalloccallback</span><span class="p">(),</span> <span class="s">"echo_read()"</span><span class="p">)</span>
<span class="k">ok</span>
<span class="k">func</span> <span class="n">echo_read</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">client</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">nRead</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">3</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nRead</span> <span class="o">></span> <span class="mi">0</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">new_uv_write_t</span><span class="p">()</span>
<span class="n">wrbuf</span> <span class="o">=</span> <span class="n">uv_buf_init</span><span class="p">(</span><span class="n">get_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">),</span> <span class="n">nread</span><span class="p">)</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">client</span><span class="p">,</span> <span class="n">wrbuf</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="s">"echo_write()"</span><span class="p">)</span>
<span class="o">?</span> <span class="n">uv_buf2str</span><span class="p">(</span><span class="n">wrbuf</span><span class="p">)</span>
<span class="n">message</span> <span class="o">=</span> <span class="s">"message from the server to the client"</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">new_uv_buf_t</span><span class="p">()</span>
<span class="n">set_uv_buf_t_len</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">len</span><span class="p">(</span><span class="n">message</span><span class="p">))</span>
<span class="n">set_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">varptr</span><span class="p">(</span><span class="s">"message"</span><span class="p">,:</span><span class="n">char</span><span class="p">))</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">client</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="s">"echo_write()"</span><span class="p">)</span>
<span class="k">ok</span>
<span class="k">func</span> <span class="n">echo_write</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">client</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">1</span><span class="o">]</span>
</pre></div>
</div>
<p>Output:</p>
<p>When we run the client, We will see the message “New Connection”</p>
<p>Then the message “hello from the client”</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Server Side
New Connection
hello from the client
</pre></div>
</div>
</div>
<div class="section" id="client-example">
<span id="index-4"></span><h2>Client Example<a class="headerlink" href="#client-example" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Client Side"</span>
<span class="n">DEFAULT_PORT</span> <span class="o">=</span> <span class="mi">13370</span>
<span class="n">DEFAULT_BACKLOG</span> <span class="o">=</span> <span class="mi">1024</span>
<span class="n">addr</span> <span class="o">=</span> <span class="n">new_sockaddr_in</span><span class="p">()</span>
<span class="n">connect</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">buffer</span> <span class="o">=</span> <span class="kp">null</span>
<span class="n">socket</span> <span class="o">=</span> <span class="kp">null</span>
<span class="k">func</span> <span class="n">main</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="n">uv_default_loop</span><span class="p">()</span>
<span class="n">Socket</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">connect</span> <span class="o">=</span> <span class="n">new_uv_connect_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">Socket</span><span class="p">)</span>
<span class="n">uv_ip4_addr</span><span class="p">(</span><span class="s">"127.0.0.1"</span><span class="p">,</span> <span class="n">DEFAULT_PORT</span><span class="p">,</span> <span class="n">addr</span><span class="p">)</span>
<span class="n">uv_tcp_connect</span><span class="p">(</span><span class="n">connect</span><span class="p">,</span><span class="n">Socket</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="s">"connect()"</span><span class="p">)</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">)</span>
<span class="n">destroy_uv_tcp_t</span><span class="p">(</span><span class="n">socket</span><span class="p">)</span>
<span class="n">destroy_uv_connect_t</span><span class="p">(</span><span class="n">connect</span><span class="p">)</span>
<span class="k">func</span> <span class="n">connect</span>
<span class="o">?</span> <span class="s">"Client: Start Connection"</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">connect</span><span class="p">,:</span><span class="n">connect</span><span class="p">)</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">1</span><span class="o">]</span>
<span class="n">nStatus</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nStatus</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="o">?</span> <span class="s">"Error : on_write_end "</span>
<span class="k">return</span>
<span class="k">ok</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">new_uv_buf_t</span><span class="p">()</span>
<span class="n">message</span> <span class="o">=</span> <span class="s">"hello from the client"</span>
<span class="n">set_uv_buf_t_len</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">len</span><span class="p">(</span><span class="n">message</span><span class="p">))</span>
<span class="n">set_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">varptr</span><span class="p">(</span><span class="s">"message"</span><span class="p">,:</span><span class="n">char</span><span class="p">))</span>
<span class="n">tcp</span> <span class="o">=</span> <span class="n">get_uv_connect_t_handle</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>
<span class="n">write_req</span> <span class="o">=</span> <span class="n">new_uv_write_t</span><span class="p">()</span>
<span class="n">buf_count</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">write_req</span><span class="p">,</span> <span class="n">tcp</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">buf_count</span><span class="p">,</span> <span class="s">"on_write_end()"</span><span class="p">)</span>
<span class="k">func</span> <span class="n">on_write_end</span>
<span class="n">uv_read_start</span><span class="p">(</span><span class="n">socket</span><span class="p">,</span> <span class="n">uv_myalloccallback</span><span class="p">(),</span> <span class="s">"echo_read()"</span><span class="p">)</span>
<span class="k">func</span> <span class="n">echo_read</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">socket</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">nRead</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">3</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nRead</span> <span class="o">></span> <span class="mi">0</span>
<span class="n">wrbuf</span> <span class="o">=</span> <span class="n">uv_buf_init</span><span class="p">(</span><span class="n">get_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">),</span> <span class="n">nread</span><span class="p">);</span>
<span class="o">?</span> <span class="n">uv_buf2str</span><span class="p">(</span><span class="n">wrbuf</span><span class="p">)</span>
<span class="k">ok</span>
</pre></div>
</div>
<p>Output:</p>
<p>We will run the client after the server</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Client Side
Client: Start Connection
hello from the client
message from the server to the client
</pre></div>
</div>
</div>
<div class="section" id="server-example-using-classes">
<span id="index-5"></span><h2>Server Example Using Classes<a class="headerlink" href="#server-example-using-classes" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="k">load</span> <span class="s">"objectslib.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Server Side - Using Classes"</span>
<span class="n">open_object</span><span class="p">(:</span><span class="n">MyServer</span><span class="p">)</span>
<span class="k">class</span> <span class="n">MyServer</span> <span class="k">from</span> <span class="n">ObjectControllerParent</span>
<span class="n">DEFAULT_PORT</span> <span class="o">=</span> <span class="mi">13370</span>
<span class="n">DEFAULT_BACKLOG</span> <span class="o">=</span> <span class="mi">1024</span>
<span class="n">addr</span> <span class="o">=</span> <span class="n">new_sockaddr_in</span><span class="p">()</span>
<span class="n">server</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">client</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="k">func</span> <span class="n">start</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="n">uv_default_loop</span><span class="p">()</span>
<span class="n">server</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">server</span><span class="p">)</span>
<span class="n">uv_ip4_addr</span><span class="p">(</span><span class="s">"127.0.0.1"</span><span class="p">,</span> <span class="n">DEFAULT_PORT</span><span class="p">,</span> <span class="n">addr</span><span class="p">)</span>
<span class="n">uv_tcp_bind</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span>
<span class="n">r</span> <span class="o">=</span> <span class="n">uv_listen</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">DEFAULT_BACKLOG</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">newconnection</span><span class="p">)</span> <span class="p">)</span>
<span class="k">if</span> <span class="n">r</span>
<span class="o">?</span> <span class="s">"Listen error "</span> <span class="o">+</span> <span class="n">uv_strerror</span><span class="p">(</span><span class="n">r</span><span class="p">)</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="k">ok</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">)</span>
<span class="n">destroy_uv_tcp_t</span><span class="p">(</span><span class="n">server</span><span class="p">)</span>
<span class="n">destroy_uv_sockaddr_in</span><span class="p">(</span><span class="n">addr</span><span class="p">)</span>
<span class="k">func</span> <span class="n">newconnection</span>
<span class="o">?</span> <span class="s">"New Connection"</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">server</span><span class="p">,:</span><span class="n">connect</span><span class="p">)</span>
<span class="n">nStatus</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nStatus</span> <span class="o"><</span> <span class="mi">0</span>
<span class="o">?</span> <span class="s">"New connection error : "</span> <span class="o">+</span> <span class="n">nStatus</span>
<span class="k">return</span>
<span class="k">ok</span>
<span class="n">client</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">client</span><span class="p">)</span>
<span class="k">if</span> <span class="n">uv_accept</span><span class="p">(</span><span class="n">server</span><span class="p">,</span> <span class="n">client</span><span class="p">)</span> <span class="o">=</span> <span class="mi">0</span>
<span class="n">uv_read_start</span><span class="p">(</span><span class="n">client</span><span class="p">,</span> <span class="n">uv_myalloccallback</span><span class="p">(),</span>
<span class="n">Method</span><span class="p">(:</span><span class="n">echo_read</span><span class="p">))</span>
<span class="k">ok</span>
<span class="k">func</span> <span class="n">echo_read</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">client</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">nRead</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">3</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nRead</span> <span class="o">></span> <span class="mi">0</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">new_uv_write_t</span><span class="p">()</span>
<span class="n">wrbuf</span> <span class="o">=</span> <span class="n">uv_buf_init</span><span class="p">(</span><span class="n">get_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">),</span> <span class="n">nread</span><span class="p">)</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">client</span><span class="p">,</span> <span class="n">wrbuf</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">echo_write</span><span class="p">))</span>
<span class="o">?</span> <span class="n">uv_buf2str</span><span class="p">(</span><span class="n">wrbuf</span><span class="p">)</span>
<span class="n">message</span> <span class="o">=</span> <span class="s">"message from the server to the client"</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">new_uv_buf_t</span><span class="p">()</span>
<span class="n">set_uv_buf_t_len</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">len</span><span class="p">(</span><span class="n">message</span><span class="p">))</span>
<span class="n">set_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">varptr</span><span class="p">(</span><span class="s">"message"</span><span class="p">,:</span><span class="n">char</span><span class="p">))</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">req</span><span class="p">,</span> <span class="n">client</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">echo_write</span><span class="p">))</span>
<span class="k">ok</span>
<span class="k">func</span> <span class="n">echo_write</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">client</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">1</span><span class="o">]</span>
</pre></div>
</div>
<p>Output:</p>
<p>When we run the client, We will see the message “New Connection”</p>
<p>Then the message “hello from the client”</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Server Side - Using Classes
New Connection
hello from the client
</pre></div>
</div>
</div>
<div class="section" id="client-example-using-classes">
<span id="index-6"></span><h2>Client Example Using Classes<a class="headerlink" href="#client-example-using-classes" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="k">load</span> <span class="s">"objectslib.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Client Side - Using Classes"</span>
<span class="n">open_object</span><span class="p">(:</span><span class="n">MyClient</span><span class="p">)</span>
<span class="k">Class</span> <span class="n">MyClient</span> <span class="k">from</span> <span class="n">ObjectControllerParent</span>
<span class="n">DEFAULT_PORT</span> <span class="o">=</span> <span class="mi">13370</span>
<span class="n">DEFAULT_BACKLOG</span> <span class="o">=</span> <span class="mi">1024</span>
<span class="n">addr</span> <span class="o">=</span> <span class="n">new_sockaddr_in</span><span class="p">()</span>
<span class="n">connect</span> <span class="o">=</span> <span class="kp">NULL</span>
<span class="n">buffer</span> <span class="o">=</span> <span class="kp">null</span>
<span class="n">socket</span> <span class="o">=</span> <span class="kp">null</span>
<span class="k">func</span> <span class="n">start</span>
<span class="n">myloop</span> <span class="o">=</span> <span class="n">uv_default_loop</span><span class="p">()</span>
<span class="n">Socket</span> <span class="o">=</span> <span class="n">new_uv_tcp_t</span><span class="p">()</span>
<span class="n">connect</span> <span class="o">=</span> <span class="n">new_uv_connect_t</span><span class="p">()</span>
<span class="n">uv_tcp_init</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">Socket</span><span class="p">)</span>
<span class="n">uv_ip4_addr</span><span class="p">(</span><span class="s">"127.0.0.1"</span><span class="p">,</span> <span class="n">DEFAULT_PORT</span><span class="p">,</span> <span class="n">addr</span><span class="p">)</span>
<span class="n">uv_tcp_connect</span><span class="p">(</span><span class="n">connect</span><span class="p">,</span><span class="n">Socket</span><span class="p">,</span> <span class="n">addr</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">connect</span><span class="p">))</span>
<span class="n">uv_run</span><span class="p">(</span><span class="n">myloop</span><span class="p">,</span> <span class="n">UV_RUN_DEFAULT</span><span class="p">)</span>
<span class="n">destroy_uv_tcp_t</span><span class="p">(</span><span class="n">socket</span><span class="p">)</span>
<span class="n">destroy_uv_connect_t</span><span class="p">(</span><span class="n">connect</span><span class="p">)</span>
<span class="k">func</span> <span class="n">connect</span>
<span class="o">?</span> <span class="s">"Client: Start Connection"</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">connect</span><span class="p">,:</span><span class="n">connect</span><span class="p">)</span>
<span class="n">req</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">1</span><span class="o">]</span>
<span class="n">nStatus</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nStatus</span> <span class="o">=</span> <span class="o">-</span><span class="mi">1</span>
<span class="o">?</span> <span class="s">"Error : on_write_end "</span>
<span class="k">return</span>
<span class="k">ok</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">new_uv_buf_t</span><span class="p">()</span>
<span class="n">message</span> <span class="o">=</span> <span class="s">"hello from the client"</span>
<span class="n">set_uv_buf_t_len</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">len</span><span class="p">(</span><span class="n">message</span><span class="p">))</span>
<span class="n">set_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">,</span><span class="n">varptr</span><span class="p">(</span><span class="s">"message"</span><span class="p">,:</span><span class="n">char</span><span class="p">))</span>
<span class="n">tcp</span> <span class="o">=</span> <span class="n">get_uv_connect_t_handle</span><span class="p">(</span><span class="n">req</span><span class="p">)</span>
<span class="n">write_req</span> <span class="o">=</span> <span class="n">new_uv_write_t</span><span class="p">()</span>
<span class="n">buf_count</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">uv_write</span><span class="p">(</span><span class="n">write_req</span><span class="p">,</span> <span class="n">tcp</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">buf_count</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">on_write_end</span><span class="p">))</span>
<span class="k">func</span> <span class="n">on_write_end</span>
<span class="n">uv_read_start</span><span class="p">(</span><span class="n">socket</span><span class="p">,</span> <span class="n">uv_myalloccallback</span><span class="p">(),</span> <span class="n">Method</span><span class="p">(:</span><span class="n">echo_read</span><span class="p">))</span>
<span class="k">func</span> <span class="n">echo_read</span>
<span class="n">aPara</span> <span class="o">=</span> <span class="n">uv_Eventpara</span><span class="p">(</span><span class="n">socket</span><span class="p">,:</span><span class="n">read</span><span class="p">)</span>
<span class="n">nRead</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">2</span><span class="o">]</span>
<span class="n">buf</span> <span class="o">=</span> <span class="n">aPara</span><span class="o">[</span><span class="mi">3</span><span class="o">]</span>
<span class="k">if</span> <span class="n">nRead</span> <span class="o">></span> <span class="mi">0</span>
<span class="n">wrbuf</span> <span class="o">=</span> <span class="n">uv_buf_init</span><span class="p">(</span><span class="n">get_uv_buf_t_base</span><span class="p">(</span><span class="n">buf</span><span class="p">),</span> <span class="n">nread</span><span class="p">);</span>
<span class="o">?</span> <span class="n">uv_buf2str</span><span class="p">(</span><span class="n">wrbuf</span><span class="p">)</span>
<span class="k">ok</span>
</pre></div>
</div>
<p>Output:</p>
<p>We will run the client after the server</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Client Side - Using Classes
Client: Start Connection
hello from the client
message from the server to the client
</pre></div>
</div>
</div>
<div class="section" id="threads-example">
<span id="index-7"></span><h2>Threads Example<a class="headerlink" href="#threads-example" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Threads"</span>
<span class="k">func</span> <span class="n">main</span>
<span class="n">one_id</span> <span class="o">=</span> <span class="n">new_uv_thread_t</span><span class="p">()</span>
<span class="n">two_id</span> <span class="o">=</span> <span class="n">new_uv_thread_t</span><span class="p">()</span>
<span class="n">uv_thread_create</span><span class="p">(</span><span class="n">one_id</span><span class="p">,</span> <span class="s">"one()"</span><span class="p">)</span>
<span class="n">uv_thread_create</span><span class="p">(</span><span class="n">two_id</span><span class="p">,</span> <span class="s">"two()"</span><span class="p">)</span>
<span class="n">uv_thread_join</span><span class="p">(</span><span class="n">one_id</span><span class="p">)</span>
<span class="n">uv_thread_join</span><span class="p">(</span><span class="n">two_id</span><span class="p">)</span>
<span class="n">destroy_uv_thread_t</span><span class="p">(</span><span class="n">one_id</span><span class="p">)</span>
<span class="n">destroy_uv_thread_t</span><span class="p">(</span><span class="n">two_id</span><span class="p">)</span>
<span class="k">func</span> <span class="n">one</span>
<span class="o">?</span> <span class="s">"Message from the First Thread!"</span>
<span class="k">func</span> <span class="n">two</span>
<span class="o">?</span> <span class="s">"Message from the Second Thread!"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Threads
Message from the First Thread!
Message from the Second Thread!
</pre></div>
</div>
</div>
<div class="section" id="threads-example-using-classes">
<span id="index-8"></span><h2>Threads Example - Using Classes<a class="headerlink" href="#threads-example-using-classes" title="Permalink to this headline">¶</a></h2>
<p>Example:</p>
<div class="highlight-ring notranslate"><div class="highlight"><pre><span></span><span class="k">load</span> <span class="s">"libuv.ring"</span>
<span class="k">load</span> <span class="s">"objectslib.ring"</span>
<span class="o">?</span> <span class="s">"Testing RingLibuv - Threads - Using Classes"</span>
<span class="n">open_object</span><span class="p">(:</span><span class="n">MyThreads</span><span class="p">)</span>
<span class="k">class</span> <span class="n">MyThreads</span> <span class="k">from</span> <span class="n">ObjectControllerParent</span>
<span class="k">func</span> <span class="n">Start</span>
<span class="n">one_id</span> <span class="o">=</span> <span class="n">new_uv_thread_t</span><span class="p">()</span>
<span class="n">two_id</span> <span class="o">=</span> <span class="n">new_uv_thread_t</span><span class="p">()</span>
<span class="n">uv_thread_create</span><span class="p">(</span><span class="n">one_id</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">One</span><span class="p">))</span>
<span class="n">uv_thread_create</span><span class="p">(</span><span class="n">two_id</span><span class="p">,</span> <span class="n">Method</span><span class="p">(:</span><span class="n">Two</span><span class="p">))</span>
<span class="n">uv_thread_join</span><span class="p">(</span><span class="n">one_id</span><span class="p">)</span>
<span class="n">uv_thread_join</span><span class="p">(</span><span class="n">two_id</span><span class="p">)</span>
<span class="n">destroy_uv_thread_t</span><span class="p">(</span><span class="n">one_id</span><span class="p">)</span>
<span class="n">destroy_uv_thread_t</span><span class="p">(</span><span class="n">two_id</span><span class="p">)</span>
<span class="k">func</span> <span class="n">one</span>
<span class="o">?</span> <span class="s">"Message from the First Thread!"</span>
<span class="k">func</span> <span class="n">Two</span>
<span class="o">?</span> <span class="s">"Message from the Second Thread!"</span>
</pre></div>
</div>
<p>Output:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Testing RingLibuv - Threads - Using Classes
Message from the First Thread!
Message from the Second Thread!
</pre></div>
</div>
</div>
</div>
</div>
</div>
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