new trunk (base for 1.5)

windows build only

Foundation/src/MemoryPool.cpp

@@ -0,0 +1,104 @@
+//
+// MemoryPool.cpp
+//
+// $Id: //poco/1.4/Foundation/src/MemoryPool.cpp#1 $
+//
+// Library: Foundation
+// Package: Core
+// Module:  MemoryPool
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include "Poco/MemoryPool.h"
+#include "Poco/Exception.h"
+
+
+namespace Poco {
+
+
+MemoryPool::MemoryPool(std::size_t blockSize, int preAlloc, int maxAlloc):
+	_blockSize(blockSize),
+	_maxAlloc(maxAlloc),
+	_allocated(preAlloc)
+{
+	poco_assert (maxAlloc == 0 || maxAlloc >= preAlloc);
+	poco_assert (preAlloc >= 0 && maxAlloc >= 0);
+
+	int r = BLOCK_RESERVE;
+	if (preAlloc > r)
+		r = preAlloc;
+	if (maxAlloc > 0 && maxAlloc < r)
+		r = maxAlloc;
+	_blocks.reserve(r);
+	for (int i = 0; i < preAlloc; ++i)
+	{
+		_blocks.push_back(new char[_blockSize]);
+	}
+}
+
+	
+MemoryPool::~MemoryPool()
+{
+	for (BlockVec::iterator it = _blocks.begin(); it != _blocks.end(); ++it)
+	{
+		delete [] *it;
+	}
+}
+
+
+void* MemoryPool::get()
+{
+	FastMutex::ScopedLock lock(_mutex);
+	
+	if (_blocks.empty())
+	{
+		if (_maxAlloc == 0 || _allocated < _maxAlloc)
+		{
+			++_allocated;
+			return new char[_blockSize];
+		}
+		else throw OutOfMemoryException("MemoryPool exhausted");
+	}
+	else
+	{
+		char* ptr = _blocks.back();
+		_blocks.pop_back();
+		return ptr;
+	}
+}
+
+	
+void MemoryPool::release(void* ptr)
+{
+	FastMutex::ScopedLock lock(_mutex);
+	
+	_blocks.push_back(reinterpret_cast<char*>(ptr));
+}
+
+
+} // namespace Poco