/// <summary>
/// Acquire a lock on the file.
/// </summary>
/// <returns></returns>
public bool AcquireLock()
{
bool ret;
lock (this)
{
if (!m_lockingModel.Locked)
{
// If lock is already acquired, nop
if (m_lockingModel.AcquireLock())
{
m_lockLevel = 1;
m_realStream = m_lockingModel.Stream;
try
{
if (m_realStream.Position > m_realStream.Length)
{
// if the file is rolled in another thread, our stream sees the updated stream length but the position IS NOT CHANGED
// any further attempts to set the position causes an exception because the current position is beyond the end of the
// file, so we must reopen the stream (which will put the cursor at the end of the file anyway)
Reopen();
}
else
{
if (m_realStream.CanSeek)
{
m_realStream.Seek(0, SeekOrigin.End);
}
}
}
catch (Exception e)
{
LogLog.Error(typeof(FileAppender), "FileAppender: INTERNAL ERROR. Unable to see file: " + e.Message);
}
ret = true;
}
else
{
ret = false;
}
}
else
{
m_lockLevel++;
ret = true;
if (m_realStream == null)
{
m_realStream = m_lockingModel.Stream;
}
}
}
return(ret);
}
public bool AcquireLock()
{
bool result = false;
lock (this)
{
if (m_lockLevel == 0)
{
m_realStream = m_lockingModel.AcquireLock();
}
if (m_realStream != null)
{
m_lockLevel++;
return(true);
}
return(result);
}
}
public bool AcquireLock()
{
bool ret = false;
lock (this) {
if (m_lockLevel == 0)
{
// If lock is already acquired, nop
m_realStream = m_lockingModel.AcquireLock();
}
if (m_realStream != null)
{
m_lockLevel++;
ret = true;
}
}
return(ret);
}