externals: Update boost to 1.72 and add Boost Context

boost/thread/lock_guard.hpp

@@ -0,0 +1,88 @@
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+// (C) Copyright 2007 Anthony Williams
+// (C) Copyright 2011-2012 Vicente J. Botet Escriba
+
+#ifndef BOOST_THREAD_LOCK_GUARD_HPP
+#define BOOST_THREAD_LOCK_GUARD_HPP
+
+#include <boost/thread/detail/config.hpp>
+#include <boost/thread/detail/delete.hpp>
+#include <boost/thread/detail/move.hpp>
+#include <boost/thread/detail/lockable_wrapper.hpp>
+#include <boost/thread/lock_options.hpp>
+#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
+#include <boost/thread/is_locked_by_this_thread.hpp>
+#include <boost/assert.hpp>
+#endif
+
+#include <boost/config/abi_prefix.hpp>
+
+namespace boost
+{
+
+  template <typename Mutex>
+  class BOOST_THREAD_SCOPED_CAPABILITY lock_guard
+  {
+  private:
+    Mutex& m;
+
+  public:
+    typedef Mutex mutex_type;
+    BOOST_THREAD_NO_COPYABLE( lock_guard )
+
+    explicit lock_guard(Mutex& m_) BOOST_THREAD_ACQUIRE(m_) :
+      m(m_)
+    {
+      m.lock();
+    }
+
+    lock_guard(Mutex& m_, adopt_lock_t) BOOST_THREAD_REQUIRES(m_) :
+      m(m_)
+    {
+#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
+      BOOST_ASSERT(is_locked_by_this_thread(m));
+#endif
+    }
+
+#if ! defined BOOST_THREAD_NO_CXX11_HDR_INITIALIZER_LIST
+    lock_guard(std::initializer_list<thread_detail::lockable_wrapper<Mutex> > l_) :
+      m(*(const_cast<thread_detail::lockable_wrapper<Mutex>*>(l_.begin())->m))
+    {
+      m.lock();
+    }
+
+    lock_guard(std::initializer_list<thread_detail::lockable_adopt_wrapper<Mutex> > l_) :
+      m(*(const_cast<thread_detail::lockable_adopt_wrapper<Mutex>*>(l_.begin())->m))
+    {
+#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
+      BOOST_ASSERT(is_locked_by_this_thread(m));
+#endif
+    }
+
+#endif
+    ~lock_guard() BOOST_THREAD_RELEASE()
+    {
+      m.unlock();
+    }
+  };
+
+
+#if ! defined BOOST_THREAD_NO_MAKE_LOCK_GUARD
+  template <typename Lockable>
+  lock_guard<Lockable> make_lock_guard(Lockable& mtx)
+  {
+    return { thread_detail::lockable_wrapper<Lockable>(mtx) };
+  }
+  template <typename Lockable>
+  lock_guard<Lockable> make_lock_guard(Lockable& mtx, adopt_lock_t)
+  {
+    return { thread_detail::lockable_adopt_wrapper<Lockable>(mtx) };
+  }
+#endif
+}
+
+#include <boost/config/abi_suffix.hpp>
+
+#endif