public override ValueTask DisposeAsync()
{
// the base class must dispose ThreadPoolBinding and FileHandle
// before _preallocatedOverlapped is disposed
ValueTask result = base.DisposeAsync();
Debug.Assert(result.IsCompleted, "the method must be sync, as it performs no flushing");
_preallocatedOverlapped?.Dispose();
return(result);
}
public void Dispose()
{
FileHandle.Dispose();
ThreadPoolBoundHandle.Dispose();
PreAllocatedOverlapped.Dispose();
}
[PlatformSpecific(TestPlatforms.Windows)] // ThreadPoolBoundHandle.BindHandle is not supported on Unix
public unsafe void AllocateNativeOverlapped_PreAllocated_WhenDisposed_ThrowsObjectDisposedException(bool useUnsafe)
{
using (ThreadPoolBoundHandle handle = CreateThreadPoolBoundHandle())
{
PreAllocatedOverlapped preAlloc = useUnsafe ?
PreAllocatedOverlapped.UnsafeCreate(delegate { }, null, null) :
new PreAllocatedOverlapped(delegate { }, null, null);
preAlloc.Dispose();
Assert.Throws <ObjectDisposedException>(() => handle.AllocateNativeOverlapped(preAlloc));
}
}
[PlatformSpecific(TestPlatforms.Windows)] // ThreadPoolBoundHandle.BindHandle is not supported on Unix
public unsafe void MultipleOperationsOverMultipleHandles()
{
const int DATA_SIZE = 2;
SafeHandle handle1 = HandleFactory.CreateAsyncFileHandleForWrite(Path.Combine(TestDirectory, @"MultipleOperationsOverMultipleHandle1.tmp"));
SafeHandle handle2 = HandleFactory.CreateAsyncFileHandleForWrite(Path.Combine(TestDirectory, @"MultipleOperationsOverMultipleHandle2.tmp"));
ThreadPoolBoundHandle boundHandle1 = ThreadPoolBoundHandle.BindHandle(handle1);
ThreadPoolBoundHandle boundHandle2 = ThreadPoolBoundHandle.BindHandle(handle2);
OverlappedContext result1 = new OverlappedContext();
OverlappedContext result2 = new OverlappedContext();
byte[] data1 = new byte[DATA_SIZE];
data1[0] = (byte)'A';
data1[1] = (byte)'B';
byte[] data2 = new byte[DATA_SIZE];
data2[0] = (byte)'C';
data2[1] = (byte)'D';
PreAllocatedOverlapped preAlloc1 = new PreAllocatedOverlapped(OnOverlappedOperationCompleted, result1, data1);
PreAllocatedOverlapped preAlloc2 = new PreAllocatedOverlapped(OnOverlappedOperationCompleted, result2, data2);
for (int i = 0; i < 10; i++)
{
NativeOverlapped *overlapped1 = boundHandle1.AllocateNativeOverlapped(preAlloc1);
NativeOverlapped *overlapped2 = boundHandle2.AllocateNativeOverlapped(preAlloc2);
fixed(byte *p1 = data1, p2 = data2)
{
int retval = DllImport.WriteFile(boundHandle1.Handle, p1, DATA_SIZE, IntPtr.Zero, overlapped1);
if (retval == 0)
{
Assert.Equal(DllImport.ERROR_IO_PENDING, Marshal.GetLastWin32Error());
}
retval = DllImport.WriteFile(boundHandle2.Handle, p2, DATA_SIZE, IntPtr.Zero, overlapped2);
if (retval == 0)
{
Assert.Equal(DllImport.ERROR_IO_PENDING, Marshal.GetLastWin32Error());
}
// Wait for overlapped operations to complete
WaitHandle.WaitAll(new WaitHandle[] { result1.Event, result2.Event });
}
boundHandle1.FreeNativeOverlapped(overlapped1);
boundHandle2.FreeNativeOverlapped(overlapped2);
result1.Event.Reset();
result2.Event.Reset();
Assert.Equal(0, result1.ErrorCode);
Assert.Equal(0, result2.ErrorCode);
Assert.Equal(DATA_SIZE, result1.BytesWritten);
Assert.Equal(DATA_SIZE, result2.BytesWritten);
}
boundHandle1.Dispose();
boundHandle2.Dispose();
preAlloc1.Dispose();
preAlloc2.Dispose();
handle1.Dispose();
handle2.Dispose();
}
internal void Dispose()
{
ReleaseResources();
_preallocatedOverlapped.Dispose();
}