Added the parts of boost which we need to access shared_ptr and weak_ptr. This will allow for improved memory management of large volumes.

library/include/boost/detail/lwm_pthreads.hpp

@@ -0,0 +1,86 @@
+#ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
+#define BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/detail/lwm_pthreads.hpp
+//
+//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//
+// 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)
+//
+
+#include <pthread.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+class lightweight_mutex
+{
+private:
+
+    pthread_mutex_t m_;
+
+    lightweight_mutex(lightweight_mutex const &);
+    lightweight_mutex & operator=(lightweight_mutex const &);
+
+public:
+
+    lightweight_mutex()
+    {
+
+// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
+
+#if defined(__hpux) && defined(_DECTHREADS_)
+        pthread_mutex_init(&m_, pthread_mutexattr_default);
+#else
+        pthread_mutex_init(&m_, 0);
+#endif
+    }
+
+    ~lightweight_mutex()
+    {
+        pthread_mutex_destroy(&m_);
+    }
+
+    class scoped_lock;
+    friend class scoped_lock;
+
+    class scoped_lock
+    {
+    private:
+
+        pthread_mutex_t & m_;
+
+        scoped_lock(scoped_lock const &);
+        scoped_lock & operator=(scoped_lock const &);
+
+    public:
+
+        scoped_lock(lightweight_mutex & m): m_(m.m_)
+        {
+            pthread_mutex_lock(&m_);
+        }
+
+        ~scoped_lock()
+        {
+            pthread_mutex_unlock(&m_);
+        }
+    };
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED