|
public ReadAsync ( byte buffer, int offset, int count, System cancellationToken ) : System.Threading.Tasks.Task |
||
| buffer | byte | |
| offset | int | |
| count | int | |
| cancellationToken | System | |
| Résultat | System.Threading.Tasks.Task |
|
static async Task<byte[]> ReadBytesAsync(PipeStream pipeStream, int length)
{
Assert.True(pipeStream.IsConnected);
byte[] buffer = new byte[length];
Assert.True(length > 0);
int readSoFar = 0;
while (readSoFar < length)
{
int len = await pipeStream.ReadAsync(buffer, readSoFar, length - readSoFar);
if (len == 0) break;
readSoFar += len;
}
return buffer;
}
static byte[] ReadBytesAsync(PipeStream pipeStream, int length)
{
Assert.True(pipeStream.IsConnected);
byte[] buffer = new byte[length];
Assert.True(length > 0);
int readSoFar = 0;
while (readSoFar < length)
{
Task<int> readTask = pipeStream.ReadAsync(buffer, readSoFar, length - readSoFar);
readTask.Wait();
int len = readTask.Result;
readSoFar += len;
}
return buffer;
}
// The IsConnected property on named pipes does not detect when the client has disconnected
// if we don't attempt any new I/O after the client disconnects. We start an async I/O here
// which serves to check the pipe for disconnection.
private async Task MonitorPipeForDisconnectionAsync(PipeStream pipeStream, CancellationToken cancellationToken)
{
byte[] buffer = new byte[0];
while (!cancellationToken.IsCancellationRequested && pipeStream.IsConnected)
{
CompilerServerLogger.Log("Before poking pipe.");
try
{
await pipeStream.ReadAsync(buffer, 0, 0).ConfigureAwait(continueOnCapturedContext: false);
}
catch (ObjectDisposedException)
{
// Another thread may have closed the stream already. Not a problem.
CompilerServerLogger.Log("Pipe has already been closed.");
return;
}
CompilerServerLogger.Log("After poking pipe.");
// Wait a hundredth of a second before trying again
await Task.Delay(10).ConfigureAwait(false);
}
if (!cancellationToken.IsCancellationRequested)
{
throw new PipeBrokenException();
}
}
/// <summary>
/// This task does not complete until we are completely done reading.
/// </summary>
internal static async Task ReadAllAsync(
PipeStream stream,
byte[] buffer,
int count,
CancellationToken cancellationToken)
{
int totalBytesRead = 0;
do
{
CompilerServerLogger.Log("Attempting to read {0} bytes from the stream",
count - totalBytesRead);
int bytesRead = await stream.ReadAsync(buffer,
totalBytesRead,
count - totalBytesRead,
cancellationToken).ConfigureAwait(false);
if (bytesRead == 0)
{
CompilerServerLogger.Log("Unexpected -- read 0 bytes from the stream.");
throw new EndOfStreamException("Reached end of stream before end of read.");
}
CompilerServerLogger.Log("Read {0} bytes", bytesRead);
totalBytesRead += bytesRead;
} while (totalBytesRead < count);
CompilerServerLogger.Log("Finished read");
}
public Task <int> ReadAsync(byte[] messageBuffer, int i, int messageBufferSize)
{
return(PipeStream.ReadAsync(messageBuffer, i, messageBufferSize));
}
