[Boost-commit] svn:boost r52534 - sandbox/memory/boost/memory

Subject: [Boost-commit] svn:boost r52534 - sandbox/memory/boost/memory
From: xushiweizh_at_[hidden]
Date: 2009-04-22 02:39:38

Author: xushiwei
Date: 2009-04-22 02:39:36 EDT (Wed, 22 Apr 2009)
New Revision: 52534
URL: http://svn.boost.org/trac/boost/changeset/52534

Log:
fixed_alloc start
Added:
   sandbox/memory/boost/memory/fixed_alloc.hpp   (contents, props changed)
Text files modified: 
   sandbox/memory/boost/memory/region_alloc.hpp |     6 +-----                                  
   1 files changed, 1 insertions(+), 5 deletions(-)

Added: sandbox/memory/boost/memory/fixed_alloc.hpp
==============================================================================
--- (empty file)
+++ sandbox/memory/boost/memory/fixed_alloc.hpp	2009-04-22 02:39:36 EDT (Wed, 22 Apr 2009)
@@ -0,0 +1,100 @@
+//
+//  boost/memory/fixed_alloc.hpp
+//
+//  Copyright (c) 2004 - 2008 xushiwei (xushiweizh_at_[hidden])
+//
+// 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/memory/index.htm for documentation.
+//
+#ifndef BOOST_MEMORY_FIXED_ALLOC_HPP
+#define BOOST_MEMORY_FIXED_ALLOC_HPP
+
+#ifndef BOOST_MEMORY_BASIC_HPP
+#include "basic.hpp"
+#endif
+
+NS_BOOST_MEMORY_BEGIN
+
+// -------------------------------------------------------------------------
+// class fixed_alloc
+
+template <class PolicyT>
+class fixed_alloc
+{
+private:
+	typedef typename PolicyT::alloc_type AllocT;
+
+public:
+	enum { MemBlockSize = PolicyT::MemBlockBytes - AllocT::Padding };
+
+	typedef AllocT alloc_type;
+	typedef size_t size_type;
+
+#pragma pack(1)
+private:
+	struct MemBlock;
+	struct Header
+	{
+		Header* pPrev;
+		Header* pNext;
+		size_t nUsed;
+	}
+
+	enum { HeaderSize = sizeof(Header) };
+	enum { BlockSize = MemBlockSize - HeaderSize };
+
+	struct MemBlock : Header
+	{
+		char buffer[BlockSize];
+	};
+
+	enum { ChunkHeaderSize = sizeof(void*) };
+	struct Chunk
+	{
+		MemBlock* pBlock;
+		char data[1];
+	};
+#pragma pack()
+
+	AllocT m_alloc;
+	Header m_blks;
+	const size_type m_cbChunk;
+	const size_type m_nMaxPerBlock;
+
+private:
+	void init_()
+	{
+		BOOST_MEMORY_ASSERT(m_nMaxPerBlock > 0);
+
+		m_blks.pPrev = m_blks.pNext = &m_blks;
+	}
+
+public:
+	explicit fixed_alloc(size_type cbElem)
+		: m_cbChunk(cbElem + ChunkHeaderSize), m_nMaxPerBlock(BlockSize / m_cbChunk)
+	{
+		init_();
+	}
+
+	fixed_alloc(AllocT alloc, size_type cbElem)
+		: : m_alloc(alloc), m_cbChunk(cbElem + ChunkHeaderSize), m_nMaxPerBlock(BlockSize / m_cbChunk)
+	{
+		init_();
+	}
+
+	region_alloc(fixed_alloc& owner)
+		: m_alloc(owner.m_alloc), m_cbChunk(cbElem + ChunkHeaderSize), m_nMaxPerBlock(BlockSize / m_cbChunk)
+	{
+		init_();
+	}
+};
+
+// -------------------------------------------------------------------------
+// $Log: $
+
+NS_BOOST_MEMORY_END
+
+#endif /* BOOST_MEMORY_FIXED_ALLOC_HPP */

Modified: sandbox/memory/boost/memory/region_alloc.hpp
==============================================================================
--- sandbox/memory/boost/memory/region_alloc.hpp	(original)
+++ sandbox/memory/boost/memory/region_alloc.hpp	2009-04-22 02:39:36 EDT (Wed, 22 Apr 2009)
@@ -36,15 +36,11 @@
 
         typedef AllocT alloc_type;
 
+#pragma pack(1)
 private:
         enum { HeaderSize = sizeof(void*) };
         enum { BlockSize = MemBlockSize - HeaderSize };
 
-#pragma pack(1)
-private:
-	struct MemBlock;
-	friend struct MemBlock;
-
         struct MemBlock
         {
                 MemBlock* pPrev;