//! \brief write memory block to virtual memory space
public Boolean Write(UInt32 tAddress, Byte[] tData)
{
if (null == tData)
{
return(false);
}
Boolean bMemoryAdded = false;
if (0 != m_MaxSpaceSize)
{
if (tAddress >= m_MaxSpaceSize)
{
return(false);
}
/*
* else if (tAddress + tData.Length >= m_MaxSpaceSize)
* {
* return false;
* }
*/
}
foreach (KeyValuePair <UInt32, MemoryControlBlock> tBlock in m_Blocks)
{
if (null == tBlock.Value)
{
continue;
}
if (tAddress < tBlock.Key)
{
//! invade into (or connect to ) a exitting one , so we try to merge this block
MemoryControlBlock tNewMBCB = new MemoryControlBlock
(
new MemoryBlock(tAddress, tData.Length, tData)
);
tNewMBCB.UpdateMemoryBlockEvent += new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tNewMBCB.LoadMemoryBlockEvent += new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
m_Blocks.Add(tAddress, tNewMBCB);
bMemoryAdded = true;
//! before a exist block
if ((tAddress + tData.Length) >= tBlock.Key)
{
CleanUp(tAddress);
break;
}
}
else if (tAddress > tBlock.Key)
{
if (tAddress <= (tBlock.Value.StartAddress + tBlock.Value.Size))
{
if (null == tBlock.Value.Memory)
{
continue;
}
tBlock.Value.Memory.Append(tAddress, tData);
tBlock.Value.Refresh();
CleanUp(tAddress);
bMemoryAdded = true;
break;
}
else
{
continue;
}
}
else
{
if (null == tBlock.Value.Memory)
{
continue;
}
//! append memory block to a exist memory block
tBlock.Value.Memory.Append(tAddress, tData);
tBlock.Value.Refresh();
CleanUp(tAddress);
bMemoryAdded = true;
break;
}
}
if (!bMemoryAdded)
{
//! a individual memory block
MemoryControlBlock tNewMBCB = new MemoryControlBlock
(
new MemoryBlock(tAddress, tData.Length, tData)
);
tNewMBCB.UpdateMemoryBlockEvent += new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tNewMBCB.LoadMemoryBlockEvent += new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
m_Blocks.Add(tAddress, tNewMBCB);
}
ManageBuffer();
return(true);
}
protected void CleanUp(UInt32 tStartKey)
{
MemoryControlBlock tLastBlock = null;
Boolean bFirstFind = true;
if (0 == m_Blocks.Count)
{
return;
}
MemoryControlBlock tItem = m_Blocks.Values[0];
for (Int32 tIndex = 0; tIndex < m_Blocks.Values.Count; tIndex++)
{
MemoryControlBlock tBlock = m_Blocks.Values[tIndex];
//foreach (KeyValuePair<UInt32, MemoryBlockControlBlock> tBlock in m_Blocks)
{
if (null == tBlock)
{
m_Blocks.Remove(tBlock.StartAddress);
continue;
}
if (0 != m_MaxSpaceSize)
{
if (tBlock.StartAddress >= m_MaxSpaceSize)
{
m_Blocks.Remove(tBlock.StartAddress);
tBlock.UpdateMemoryBlockEvent -= new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tBlock.LoadMemoryBlockEvent -= new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
tIndex--;
continue;
}
}
if (tBlock.StartAddress < tStartKey)
{
continue;
}
else if (bFirstFind)
{
if (null == tBlock.Memory)
{
continue;
}
bFirstFind = false;
tLastBlock = tBlock;
continue;
}
tBlock.Refresh();
if ((tLastBlock.StartAddress + tLastBlock.Size) >= tBlock.StartAddress)
{
if (null == tBlock.Memory)
{
m_Blocks.Remove(tBlock.StartAddress);
tBlock.UpdateMemoryBlockEvent -= new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tBlock.LoadMemoryBlockEvent -= new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
tIndex--;
continue;
}
//! we should merge these memory block
MemoryBlock tNewMemoryBlock = Merge(tBlock.Memory, tLastBlock.Memory);
if (null == tNewMemoryBlock)
{
continue;
}
//! creat new memory block control block
MemoryControlBlock tNewMBCB = new MemoryControlBlock(tNewMemoryBlock);
tNewMBCB.UpdateMemoryBlockEvent += new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tNewMBCB.LoadMemoryBlockEvent += new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
//! remove old mbcb
m_Blocks.Remove(tLastBlock.StartAddress);
tLastBlock.UpdateMemoryBlockEvent -= new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tLastBlock.LoadMemoryBlockEvent -= new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
tIndex--;
m_Blocks.Remove(tBlock.StartAddress);
tBlock.UpdateMemoryBlockEvent -= new MemoryControlBlock.UpdateMemoryBlock(OnUpdateMemorySpace);
tBlock.LoadMemoryBlockEvent -= new MemoryControlBlock.LoadMemoryBlock(OnLoadMemoryBlock);
tIndex--;
//! add this new block to list
m_Blocks.Add(tNewMBCB.StartAddress, tNewMBCB);
//! update last block
tLastBlock = tNewMBCB;
}
}
}
}
