General refactoring, using C++11

* Remove broken RecycledObjectPool

* Fix beast::ServiceQueue using List instead of LockFreeStack

* Add class semaphore, fixes broken Semaphore

* Move crytpo module files to new beast directory

* Use c++11 replacements for boost and beast types:
  - std::atomic instead of beast::Atomic
  - std::function instead of boost::function, beast::function
  - std::unique_ptr instead of beast::ScopedPointer
  - std::shared_ptr instead of boost::shared_ptr

* Remove modules:
  - beast_db
  - beast_crypto
  - beast_extras

* Remove unnecessary classes:
  - AbstractFifo
  - AddConst
  - AtomicCounter
  - AtomicFlag
  - AtomicPointer
  - AtomicState
  - CopyConst
  - Expression
  - ForwardList
  - IfCond
  - Interval
  - IntrusiveArray
  - KeyvaDB
  - PointerToOther
  - PointerTraits
  - RemoveConst
  - RemoveConstVolatile
  - RemoveReference
  - RemoveVolatile
  - SharedObjectArray
  - SingleThreadedSharedObject
  - SophiaDB factory
  - SortedSet
  - WeakReference
  - beast::unique_ptr

src/ripple/beast/ripple_beast.cpp

@@ -34,8 +34,6 @@
 #endif
 
 #include "../beast/modules/beast_asio/beast_asio.cpp"
-#include "../beast/modules/beast_crypto/beast_crypto.cpp"
-#include "../beast/modules/beast_db/beast_db.cpp"
 #include "../beast/modules/beast_sqdb/beast_sqdb.cpp"
 
 #include "../beast/beast/asio/Asio.cpp"

src/ripple/http/api/Server.h

@@ -20,6 +20,7 @@
 #ifndef RIPPLE_HTTP_SERVER_H_INCLUDED
 #define RIPPLE_HTTP_SERVER_H_INCLUDED
 
+#include <memory>
 #include <ostream>
 
 namespace ripple {
@@ -74,7 +75,7 @@ public:
     void stop ();
 
 private:
-    ScopedPointer <ServerImpl> m_impl;
+    std::unique_ptr <ServerImpl> m_impl;
 };
 
 }

src/ripple/http/impl/Peer.h

@@ -20,6 +20,8 @@
 #ifndef RIPPLE_HTTP_PEER_H_INCLUDED
 #define RIPPLE_HTTP_PEER_H_INCLUDED
 
+#include <memory>
+
 namespace ripple {
 namespace HTTP {
 
@@ -57,16 +59,16 @@ public:
     boost::asio::io_service::strand m_strand;
     boost::asio::deadline_timer m_data_timer;
     boost::asio::deadline_timer m_request_timer;
-    ScopedPointer <MultiSocket> m_socket;
+    std::unique_ptr <MultiSocket> m_socket;
     MemoryBlock m_buffer;
     HTTPRequestParser m_parser;
     int m_writesPending;
     bool m_closed;
     bool m_callClose;
-    Atomic <int> m_detached;
     SharedPtr <Peer> m_detach_ref;
     boost::optional <boost::asio::io_service::work> m_work;
     int m_errorCode;
+    std::atomic <int> m_detached;
 
     //--------------------------------------------------------------------------
 
@@ -80,6 +82,7 @@ public:
         , m_closed (false)
         , m_callClose (false)
         , m_errorCode (0)
+        , m_detached (0)
     {
         tag = nullptr;
 
@@ -93,7 +96,8 @@ public:
         case Port::require_ssl: flags = MultiSocket::server_ssl_required; break;
         }
 
-        m_socket = MultiSocket::New (m_impl.get_io_service(), port.context->get(), flags);
+        m_socket.reset (MultiSocket::New (
+            m_impl.get_io_service(), port.context->get(), flags));
 
         m_impl.add (*this);
     }
@@ -163,7 +167,7 @@ public:
     // Make the Session asynchronous
     void detach ()
     {
-        if (m_detached.compareAndSetBool (1, 0))
+        if (m_detached.exchange (1) == 0)
         {
             bassert (! m_work);
             bassert (m_detach_ref.empty());

src/ripple/peerfinder/impl/CheckerAdapter.h

@@ -20,6 +20,8 @@
 #ifndef RIPPLE_PEERFINDER_CHECKERADAPTER_H_INCLUDED
 #define RIPPLE_PEERFINDER_CHECKERADAPTER_H_INCLUDED
 
+#include <memory>
+
 namespace ripple {
 namespace PeerFinder {
 
@@ -39,7 +41,7 @@ class CheckerAdapter : public Checker
 private:
     SerializedContext& m_context;
     ServiceQueue& m_queue;
-    ScopedPointer <Checker> m_checker;
+    std::unique_ptr <Checker> m_checker;
 
     struct Handler
     {

src/ripple/sitefiles/impl/Logic.h

@@ -20,6 +20,8 @@
 #ifndef RIPPLE_SITEFILES_LOGIC_H_INCLUDED
 #define RIPPLE_SITEFILES_LOGIC_H_INCLUDED
 
+#include <memory>
+
 namespace ripple {
 namespace SiteFiles {
 
@@ -74,7 +76,7 @@ public:
 
     SharedState m_state;
     Journal m_journal;
-    ScopedPointer <HTTPClientBase> m_client;
+    std::unique_ptr <HTTPClientBase> m_client;
 
     explicit Logic (Journal journal)
         : m_journal (journal)

src/ripple/testoverlay/api/NetworkType.h

@@ -20,8 +20,7 @@
 #ifndef RIPPLE_TESTOVERLAY_NETWORKTYPE_H_INCLUDED
 #define RIPPLE_TESTOVERLAY_NETWORKTYPE_H_INCLUDED
 
-namespace TestOverlay
-{
+namespace TestOverlay {
 
 template <class ConfigParam>
 class NetworkType : public ConfigParam
@@ -33,7 +32,7 @@ public:
     typedef typename Config::State      State;
     typedef typename Config::SizeType   SizeType;
 
-    typedef std::vector <ScopedPointer <Peer> > Peers;
+    typedef std::vector <std::unique_ptr <Peer> > Peers;
 
     NetworkType ()
         : m_steps (0)
@@ -63,7 +62,7 @@ public:
     Peer& createPeer ()
     {
         Peer* peer (new Peer (*this));
-        m_peers.push_back (peer);
+        m_peers.push_back (std::unique_ptr <Peer> (peer));
         return *peer;
     }
     

src/ripple/testoverlay/ripple_testoverlay.h

@@ -25,6 +25,8 @@
 
 #include "beast/modules/beast_core/beast_core.h"
 
+#include <memory>
+
 /** Provides a template based peer to peer network simulator.
 
     A TestOverlay::Network simulates an entire peer to peer network.

src/ripple/types/api/Base58.h

@@ -33,6 +33,7 @@
 #define RIPPLE_TYPES_BASE58_H
 
 #include <iterator>
+#include <type_traits>
 
 #include "Blob.h"
 
@@ -87,7 +88,7 @@ public:
         Alphabet const& alphabet, bool withCheck)
     {
         typedef typename std::iterator_traits<InputIt>::value_type value_type;
-        std::vector <typename mpl::RemoveConst <value_type>::type> v;
+        std::vector <typename std::remove_const <value_type>::type> v;
         std::size_t const size (std::distance (first, last));
         if (withCheck)
         {

src/ripple/types/api/RippleAssets.h

@@ -20,15 +20,7 @@
 #ifndef RIPPLE_TYPES_RIPPLEASSETS_H_INCLUDED
 #define RIPPLE_TYPES_RIPPLEASSETS_H_INCLUDED
 
-#ifndef RIPPLE_USE_C11
-#define RIPPLE_USE_C11 1
-#endif
-
-#if RIPPLE_USE_C11
-# include <type_traits>
-#else
-# include "beast/beast/mpl/IfCond.h"
-#endif
+#include <type_traits>
 
 namespace ripple {
 
@@ -55,21 +47,12 @@ template <bool ByValue>
 class RippleAssetType
 {
 public:
-#if RIPPLE_USE_C11
     typedef typename std::conditional <ByValue,
         RippleCurrency, RippleCurrency const&>::type Currency;
 
     typedef typename std::conditional <ByValue,
         RippleIssuer, RippleIssuer const&>::type Issuer;
 
-#else
-    typedef typename mpl::IfCond <ByValue,
-        RippleCurrency, RippleCurrency const&>::type Currency;
-
-    typedef typename mpl::IfCond <ByValue,
-        RippleIssuer, RippleIssuer const&>::type Issuer;
-#endif
-
     Currency currency;
     Issuer issuer;
 

src/ripple/types/ripple_types.h

@@ -23,7 +23,7 @@
 #include "../json/ripple_json.h"
 
 #include "beast/modules/beast_core/beast_core.h"
-#include "beast/modules/beast_crypto/beast_crypto.h" // for UnsignedInteger, Remove ASAP!
+#include "beast/beast/Crypto.h"
 
 #include "beast/modules/beast_core/system/BeforeBoost.h"
 #include <boost/utility/base_from_member.hpp>

src/ripple/validators/impl/Logic.h

@@ -20,6 +20,8 @@
 #ifndef RIPPLE_VALIDATORS_LOGIC_H_INCLUDED
 #define RIPPLE_VALIDATORS_LOGIC_H_INCLUDED
 
+#include <memory>
+
 namespace ripple {
 namespace Validators {
 
@@ -158,7 +160,7 @@ public:
     {
         if (findSourceByID (source->uniqueID()))
         {
-            ScopedPointer <Source> object (source);
+            std::unique_ptr <Source> object (source);
             m_journal.error << "Duplicate " << source->name();
             return;
         }

src/ripple/validators/impl/SourceFile.cpp

@@ -89,10 +89,7 @@ private:
 
 SourceFile* SourceFile::New (File const& file)
 {
-    ScopedPointer <SourceFile> object (
-        new SourceFileImp (file));
-
-    return object.release ();
+    return new SourceFileImp (file);
 }
 
 }

src/ripple/validators/impl/SourceStrings.cpp

@@ -75,10 +75,7 @@ private:
 SourceStrings* SourceStrings::New (
     String name, StringArray const& strings)
 {
-    ScopedPointer <SourceStrings> object (
-        new SourceStringsImp (name, strings));
-
-    return object.release ();
+    return new SourceStringsImp (name, strings);
 }
 
 }

src/ripple/validators/impl/SourceURL.cpp

@@ -17,6 +17,8 @@
 */
 //==============================================================================
 
+#include <memory>
+
 namespace ripple {
 namespace Validators {
 
@@ -75,7 +77,7 @@ public:
 
 private:
     URL m_url;
-    ScopedPointer <HTTPClientBase> m_client;
+    std::unique_ptr <HTTPClientBase> m_client;
 };
 
 //------------------------------------------------------------------------------