/// <summary>
/// Writes all of the dirty blocks passed onto the disk subsystem. Also computes the checksum for the data.
/// </summary>
/// <param name="currentEndOfCommitPosition">the last valid byte of the file system where this data will be appended to.</param>
/// <param name="stream">the source of the data to dump to the disk</param>
/// <param name="length">The number by bytes to write to the file system.</param>
/// <param name="waitForWriteToDisk">True to wait for a complete commit to disk before returning from this function.</param>
public void Write(long currentEndOfCommitPosition, MemoryPoolStreamCore stream, long length, bool waitForWriteToDisk)
{
byte[] buffer = m_bufferQueue.Dequeue();
long endPosition = currentEndOfCommitPosition + length;
long currentPosition = currentEndOfCommitPosition;
while (currentPosition < endPosition)
{
IntPtr ptr;
int streamLength;
stream.ReadBlock(currentPosition, out ptr, out streamLength);
int subLength = (int)Math.Min(streamLength, endPosition - currentPosition);
Footer.ComputeChecksumAndClearFooter(ptr, m_fileStructureBlockSize, subLength);
Marshal.Copy(ptr, buffer, 0, subLength);
WriteRaw(currentPosition, buffer, subLength);
currentPosition += subLength;
}
m_bufferQueue.Enqueue(buffer);
if (waitForWriteToDisk)
{
FlushFileBuffers();
}
else
{
using (m_isUsingStream.EnterReadLock())
{
m_stream.Flush(false);
}
}
}
public void TestConstructor()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
public void TestConstructor()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
public void TestAlignment()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
BlockArguments args = new BlockArguments();
ms.ConfigureAlignment(41211, 4096);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
args.Position = 41211;
ms.GetBlock(args);
Assert.AreEqual(41211L, args.FirstPosition);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes - (41211 % 4096), args.Length);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
public void TestAllocateAndDeallocate()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
BlockArguments args = new BlockArguments();
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
args.Position = Globals.MemoryPool.PageSize;
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 2 * Globals.MemoryPool.PageSize);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
public void TestAlignment()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
BlockArguments args = new BlockArguments();
ms.ConfigureAlignment(41211, 4096);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
args.Position = 41211;
ms.GetBlock(args);
Assert.AreEqual(41211L, args.FirstPosition);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes - (41211 % 4096), args.Length);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
public void TestAllocateAndDeallocate()
{
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
using (MemoryPoolStreamCore ms = new MemoryPoolStreamCore())
{
BlockArguments args = new BlockArguments();
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, Globals.MemoryPool.PageSize);
args.Position = Globals.MemoryPool.PageSize;
ms.GetBlock(args);
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 2 * Globals.MemoryPool.PageSize);
}
Assert.AreEqual(Globals.MemoryPool.AllocatedBytes, 0L);
}
