public override int Read(byte[] buffer, int offset, int count) {
bool isDoingWrite = false;
int result = -1;
if (Interlocked.Increment(ref m_ReadNesting) != 1) {
throw new NotSupportedException(SR.GetString(SR.net_io_invalidnestedcall, "Read", "read"));
}
try {
if (m_BytesToSkip != 0L) {
// Sometime we want to combine cached + live stream AND the user requested explicit range starts from not 0
byte[] tempBuffer = new byte[4096];
while (m_BytesToSkip != 0L) {
int bytes = m_OriginalStream.Read(tempBuffer, 0, (m_BytesToSkip < (long)tempBuffer.Length? (int)m_BytesToSkip: tempBuffer.Length));
if (bytes == 0)
m_SeenReadEOF = true;
m_BytesToSkip -= bytes;
if (!m_ShadowStreamIsDead)
m_ShadowStream.Write(tempBuffer, 0, bytes);
}
}
result = m_OriginalStream.Read(buffer, offset, count);
if (result == 0)
m_SeenReadEOF = true;
if (m_ShadowStreamIsDead) {
return result;
}
isDoingWrite = true;
m_ShadowStream.Write(buffer, offset, result);
return result;
}
catch (Exception e) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException)
throw;
GlobalLog.Print("ShadowReadStream::Read() Got Exception, disabling the shadow stream, stack trace = " + e.ToString());
if (!m_ShadowStreamIsDead) {
// try to swallow even serious exception, since got nothing to loose?
m_ShadowStreamIsDead = true;
try {
if (m_ShadowStream is ICloseEx)
((ICloseEx)m_ShadowStream).CloseEx(CloseExState.Abort | CloseExState.Silent);
else
m_ShadowStream.Close();
}
catch (Exception ee) {
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException)
throw;
GlobalLog.Print("ShadowReadStream::Read() Got (ignoring) Exception, on shadow stream.Close, stack trace = " + ee.ToString());
}
catch {
GlobalLog.Print("ShadowReadStream::Read() Got (ignoring) Exception, on shadow stream.Close, stack trace = Non-CLS Compliant Exception");
}
}
if (!isDoingWrite || m_ThrowOnWriteError)
throw;
return result;
}
catch {
GlobalLog.Print("ShadowReadStream::Read() Got Exception, disabling the shadow stream, stack trace = Non-CLS Compliant Exception");
if (!m_ShadowStreamIsDead) {
// try to swallow even serious exception, since got nothing to loose?
m_ShadowStreamIsDead = true;
try {
if (m_ShadowStream is ICloseEx)
((ICloseEx)m_ShadowStream).CloseEx(CloseExState.Abort | CloseExState.Silent);
else
m_ShadowStream.Close();
}
catch (Exception ee) {
if (NclUtilities.IsFatal(ee)) throw;
GlobalLog.Print("ShadowReadStream::Read() Got (ignoring) Exception, on shadow stream.Close, stack trace = " + ee.ToString());
}
catch {
GlobalLog.Print("ShadowReadStream::Read() Got (ignoring) Exception, on shadow stream.Close, stack trace = Non-CLS Compliant Exception");
}
}
if (!isDoingWrite || m_ThrowOnWriteError)
throw;
return result;
}
finally {
Interlocked.Decrement(ref m_ReadNesting);
}
}
