Rearrange sources (#4997)

src/xrpld/app/main/BasicApp.cpp

@@ -0,0 +1,44 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <ripple/app/main/BasicApp.h>
+#include <ripple/beast/core/CurrentThreadName.h>
+
+BasicApp::BasicApp(std::size_t numberOfThreads)
+{
+    work_.emplace(io_service_);
+    threads_.reserve(numberOfThreads);
+
+    while (numberOfThreads--)
+    {
+        threads_.emplace_back([this, numberOfThreads]() {
+            beast::setCurrentThreadName(
+                "io svc #" + std::to_string(numberOfThreads));
+            this->io_service_.run();
+        });
+    }
+}
+
+BasicApp::~BasicApp()
+{
+    work_.reset();
+
+    for (auto& t : threads_)
+        t.join();
+}