[Boost-commit] svn:boost r53598 - sandbox/memory/boost/memory

Subject: [Boost-commit] svn:boost r53598 - sandbox/memory/boost/memory
From: xushiweizh_at_[hidden]
Date: 2009-06-03 09:21:18

Author: xushiwei
Date: 2009-06-03 09:21:17 EDT (Wed, 03 Jun 2009)
New Revision: 53598
URL: http://svn.boost.org/trac/boost/changeset/53598

Log:
region_alloc å¢žåŠ ç­–ç•¥ - m_fPreAlloc: 表示 region_alloc æž„é€ æ—¶æ˜¯å¦è¿›è¡Œå†…å­˜çš„é¢„åˆ†é…ã€‚é»˜è®¤ä¸º true。
Text files modified: 
   sandbox/memory/boost/memory/region_alloc.hpp |    17 ++++++++++++-----                       
   1 files changed, 12 insertions(+), 5 deletions(-)

Modified: sandbox/memory/boost/memory/region_alloc.hpp
==============================================================================
--- sandbox/memory/boost/memory/region_alloc.hpp	(original)
+++ sandbox/memory/boost/memory/region_alloc.hpp	2009-06-03 09:21:17 EDT (Wed, 03 Jun 2009)
@@ -23,7 +23,7 @@
 
 #pragma pack(1)
 
-template <class PolicyT>
+template <class PolicyT, int m_fPreAlloc = 1>
 class region_alloc
 {
 private:
@@ -68,10 +68,17 @@
 
         void BOOST_MEMORY_CALL init_()
         {
-		MemBlock* pNew = (MemBlock*)m_alloc.allocate(sizeof(MemBlock));
-		pNew->pPrev = NULL;
-		m_begin = pNew->buffer;
-		m_end = (char*)pNew + m_alloc.alloc_size(pNew);
+		if (m_fPreAlloc)
+		{
+			MemBlock* pNew = (MemBlock*)m_alloc.allocate(sizeof(MemBlock));
+			pNew->pPrev = NULL;
+			m_begin = pNew->buffer;
+			m_end = (char*)pNew + m_alloc.alloc_size(pNew);
+		}
+		else
+		{
+			m_begin = m_end = (char*)HeaderSize;
+		}
         }
 
 public: