[Boost-commit] svn:boost r56911 - sandbox/stm/branches/vbe/boost/stm/memory_managers

Subject: [Boost-commit] svn:boost r56911 - sandbox/stm/branches/vbe/boost/stm/memory_managers
From: vicente.botet_at_[hidden]
Date: 2009-10-16 07:19:14

Author: viboes
Date: 2009-10-16 07:19:13 EDT (Fri, 16 Oct 2009)
New Revision: 56911
URL: http://svn.boost.org/trac/boost/changeset/56911

Log:
TBoost.STM vbe: 
* Adding memory manager independent from the transaction object

Added:
   sandbox/stm/branches/vbe/boost/stm/memory_managers/
   sandbox/stm/branches/vbe/boost/stm/memory_managers/base_memory_manager.hpp   (contents, props changed)
   sandbox/stm/branches/vbe/boost/stm/memory_managers/memory_manage.hpp   (contents, props changed)

Added: sandbox/stm/branches/vbe/boost/stm/memory_managers/base_memory_manager.hpp
==============================================================================
--- (empty file)
+++ sandbox/stm/branches/vbe/boost/stm/memory_managers/base_memory_manager.hpp	2009-10-16 07:19:13 EDT (Fri, 16 Oct 2009)
@@ -0,0 +1,87 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Justin E. Gottchlich 2009.
+// (C) Copyright Vicente J. Botet Escriba 2009.
+// 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)
+//
+// See http://www.boost.org/libs/stm for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_STM_BASE_MEMORY_MANAGER__HPP
+#define BOOST_STM_BASE_MEMORY_MANAGER__HPP
+
+//-----------------------------------------------------------------------------
+#include <pthread.h>
+//-----------------------------------------------------------------------------
+#include <list>
+//-----------------------------------------------------------------------------
+#include <boost/stm/detail/config.hpp>
+//-----------------------------------------------------------------------------
+#include <boost/stm/datatypes.hpp>
+#include <boost/stm/synchro.hpp>
+//-----------------------------------------------------------------------------
+#include <boost/stm/detail/memory_pool.hpp>
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+namespace boost { namespace stm {
+
+//-----------------------------------------------------------------------------
+// forward declarations
+//-----------------------------------------------------------------------------
+class transaction;
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+// this class provides two functions (retrieve_mem and return_mem) and  
+// to manage a pool of memory
+//-----------------------------------------------------------------------------
+
+class base_memory_manager
+{
+    base_memory_manager();
+public:
+    static void alloc_size(size_t size) { memory_.alloc_size(size); }
+
+    static void return_mem(void *mem, size_t size)
+    {
+#ifndef BOOST_STM_USE_BOOST_MUTEX
+        lock(&transactionObjectMutex_);
+        memory_.returnChunk(mem, size);
+        unlock(&transactionObjectMutex_);
+#else
+        boost::lock_guard<boost::mutex> lock(transactionObjectMutex_);
+        memory_.returnChunk(mem, size);
+#endif
+    }
+
+    static void* retrieve_mem(size_t size)
+    {
+#ifndef BOOST_STM_USE_BOOST_MUTEX
+        lock(&transactionObjectMutex_);
+        void *mem = memory_.retrieveChunk(size);
+        unlock(&transactionObjectMutex_);
+#else
+        boost::lock_guard<boost::mutex> lock(transactionObjectMutex_);
+        void *mem = memory_.retrieveChunk(size);
+#endif
+
+      return mem;
+    }
+
+private:
+
+    static Mutex transactionObjectMutex_;
+    static MemoryPool<void*> memory_;
+};
+
+} // namespace core
+}
+#endif // BOOST_STM_BASE_MEMORY_MANAGER__HPP
+
+

Added: sandbox/stm/branches/vbe/boost/stm/memory_managers/memory_manage.hpp
==============================================================================
--- (empty file)
+++ sandbox/stm/branches/vbe/boost/stm/memory_managers/memory_manage.hpp	2009-10-16 07:19:13 EDT (Fri, 16 Oct 2009)
@@ -0,0 +1,73 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Justin E. Gottchlich 2009.
+// (C) Copyright Vicente J. Botet Escriba 2009.
+// 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)
+//
+// See http://www.boost.org/libs/stm for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_STM_MEMORY_MANAGER__HPP
+#define BOOST_STM_MEMORY_MANAGER__HPP
+
+//-----------------------------------------------------------------------------
+//#include <stdarg.h>
+#include <pthread.h>
+//-----------------------------------------------------------------------------
+#include <list>
+//-----------------------------------------------------------------------------
+#include <boost/stm/detail/config.hpp>
+//-----------------------------------------------------------------------------
+#include <boost/stm/base_transaction_object.hpp>
+#include <boost/stm/cache_fct.hpp>
+#include <boost/stm/datatypes.hpp>
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+
+//-----------------------------------------------------------------------------
+namespace boost { namespace stm {
+
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+//-----------------------------------------------------------------------------
+// memory_manager mixin
+// Functions new and delete 
+
+// The parameter Base allows to mix memory_manager and polymorphism
+// class B : memory_manager<B> {}
+// class D : memory_manager<D, B> {}
+// the single issue is the forward constructors from memory_manager<D, B> to B
+//-----------------------------------------------------------------------------
+template <class Derived, typename Base>
+class memory_manager : public Base
+{
+public:
+    typedef memory_manager<Derived, Base> this_type;
+
+    void* operator new(size_t size, const nothrow_t&) throw () {
+        return base_memory_manager::retrieve_mem(size);
+    }
+    
+    void* operator new(size_t size) throw (std::bad_alloc) {
+        void* ptr= base_memory_manager::retrieve_mem(size);
+        if (ptr==0) throw std::bad_alloc;
+        return ptr;
+    }
+
+    void operator delete(void* mem) throw () {
+        static Derived elem;
+        static size_t elemSize = sizeof(elem);
+        base_memory_manager::return_mem(mem, elemSize);
+   }
+};
+
+}}
+#endif // BOOST_STM_TRANSACTION_OBJECT__HPP
+
+