public override bool GetMultipleQueuedCompletionStatus(int timeout, CompletionStatus[] completionStatuses, out int removed)
{
// Windows XP Has NO GetQueuedCompletionStatusEx
// so we need dequeue IOPC one by one
if (Environment.OSVersion.Version.Major == 5)
{
removed = 0;
CompletionStatus completeStatus;
bool result = GetQueuedCompletionStatus(timeout, out completeStatus);
if (result)
{
completionStatuses[0] = completeStatus;
removed = 1;
}
return(result);
}
else
{
if (m_overlappedEntries == null || m_overlappedEntries.Length < completionStatuses.Length)
{
if (m_overlappedEntries != null)
{
m_overlappedEntriesHandle.Free();
}
m_overlappedEntries = new OverlappedEntry[completionStatuses.Length];
m_overlappedEntriesHandle = GCHandle.Alloc(m_overlappedEntries, GCHandleType.Pinned);
m_overlappedEntriesAddress = Marshal.UnsafeAddrOfPinnedArrayElement(m_overlappedEntries, 0);
}
bool result = UnsafeMethods.GetQueuedCompletionStatusEx(m_completionPortHandle,
m_overlappedEntriesAddress,
completionStatuses.Length, out removed, timeout,
false);
if (!result)
{
int error = Marshal.GetLastWin32Error();
if (error == WaitTimeoutError)
{
removed = 0;
return(false);
}
throw new Win32Exception(error);
}
for (int i = 0; i < removed; i++)
{
HandleCompletionStatus(out completionStatuses[i], m_overlappedEntries[i].Overlapped,
m_overlappedEntries[i].CompletionKey, m_overlappedEntries[i].BytesTransferred);
}
}
return(true);
}
public override bool GetMultipleQueuedCompletionStatus(int timeout, CompletionStatus[] completionStatuses, out int removed)
{
if (m_overlappedEntries == null || m_overlappedEntries.Length < completionStatuses.Length)
{
if (m_overlappedEntries != null)
{
m_overlappedEntriesHandle.Free();
}
m_overlappedEntries = new OverlappedEntry[completionStatuses.Length];
m_overlappedEntriesHandle = GCHandle.Alloc(m_overlappedEntries, GCHandleType.Pinned);
m_overlappedEntriesAddress = Marshal.UnsafeAddrOfPinnedArrayElement(m_overlappedEntries, 0);
}
bool result = UnsafeMethods.GetQueuedCompletionStatusEx(m_completionPortHandle,
m_overlappedEntriesAddress,
completionStatuses.Length, out removed, timeout,
false);
if (!result)
{
int error = Marshal.GetLastWin32Error();
if (error == WaitTimeoutError)
{
removed = 0;
return(false);
}
throw new Win32Exception(error);
}
for (int i = 0; i < removed; i++)
{
HandleCompletionStatus(out completionStatuses[i], m_overlappedEntries[i].Overlapped,
m_overlappedEntries[i].CompletionKey, m_overlappedEntries[i].BytesTransferred);
}
return(true);
}