public void close() {
synchronized (JTermiosImpl.this) {
if (m_FD >= 0) {
m_OpenPorts.remove(m_FD);
m_PortFDs[m_FD] = false;
m_FD = -1;
}
if (m_CancelWaitSema4 != null) SetEvent(m_CancelWaitSema4);
if (m_Comm != null) {
ResetEvent(m_SelOVL.hEvent);
if (!CancelIo(m_Comm))
log =
log
&& log(
1,
"CancelIo() failed, GetLastError()= %d, %s\n",
GetLastError(),
lineno(1));
if (!PurgeComm(m_Comm, PURGE_TXABORT + PURGE_TXCLEAR + PURGE_RXABORT + PURGE_RXCLEAR))
log =
log
&& log(
1,
"PurgeComm() failed, GetLastError()= %d, %s\n",
GetLastError(),
lineno(1));
}
HANDLE h; // / 'hEvent' might never have been 'read' so read it
// to this var first
synchronized (m_RdBuffer) {
h = (HANDLE) m_RdOVL.readField("hEvent");
m_RdOVL = null;
if (h != null && !h.equals(NULL) && !h.equals(INVALID_HANDLE_VALUE)) CloseHandle(h);
}
synchronized (m_WrBuffer) {
h = (HANDLE) m_WrOVL.readField("hEvent");
m_WrOVL = null;
if (h != null && !h.equals(NULL) && !h.equals(INVALID_HANDLE_VALUE)) CloseHandle(h);
}
// Ensure that select() is through before releasing the m_SelOVL
waitUnlock();
h = (HANDLE) m_SelOVL.readField("hEvent");
m_SelOVL = null;
if (h != null && !h.equals(NULL) && !h.equals(INVALID_HANDLE_VALUE)) CloseHandle(h);
if (m_Comm != null && m_Comm != NULL && m_Comm != INVALID_HANDLE_VALUE) CloseHandle(m_Comm);
m_Comm = null;
}
}
@cli.System.Security.SecuritySafeCriticalAttribute.Annotation
void release(FileDescriptor fd, long pos, long size) throws IOException {
FileStream fs = (FileStream)fd.getStream();
if (WINDOWS)
{
int ERROR_NOT_LOCKED = 158;
OVERLAPPED o = new OVERLAPPED();
o.OffsetLow = (int)pos;
o.OffsetHigh = (int)(pos >> 32);
int result = UnlockFileEx(fs.get_SafeFileHandle(), 0, (int)size, (int)(size >> 32), o);
if (result == 0 && Marshal.GetLastWin32Error() != ERROR_NOT_LOCKED)
{
throw new IOException("Release failed");
}
}
else
{
try
{
if (false) throw new cli.System.ArgumentOutOfRangeException();
if (false) throw new cli.System.IO.IOException();
if (false) throw new cli.System.ObjectDisposedException("");
fs.Unlock(pos, size);
}
catch (cli.System.IO.IOException x)
{
if (!NotLockedHack.isErrorNotLocked(x))
{
throw new IOException(x.getMessage());
}
}
catch (cli.System.ArgumentOutOfRangeException
| cli.System.ObjectDisposedException x)
{
throw new IOException(x.getMessage());
}
}
}
@cli.System.Security.SecuritySafeCriticalAttribute.Annotation
int lock(FileDescriptor fd, boolean blocking, long pos, long size,
boolean shared) throws IOException
{
FileStream fs = (FileStream)fd.getStream();
if (WINDOWS)
{
int LOCKFILE_FAIL_IMMEDIATELY = 1;
int LOCKFILE_EXCLUSIVE_LOCK = 2;
int ERROR_LOCK_VIOLATION = 33;
int flags = 0;
OVERLAPPED o = new OVERLAPPED();
o.OffsetLow = (int)pos;
o.OffsetHigh = (int)(pos >> 32);
if (!blocking)
{
flags |= LOCKFILE_FAIL_IMMEDIATELY;
}
if (!shared)
{
flags |= LOCKFILE_EXCLUSIVE_LOCK;
}
int result = LockFileEx(fs.get_SafeFileHandle(), flags, 0, (int)size, (int)(size >> 32), o);
if (result == 0)
{
int error = Marshal.GetLastWin32Error();
if (!blocking && error == ERROR_LOCK_VIOLATION)
{
return NO_LOCK;
}
throw new IOException("Lock failed");
}
return LOCKED;
}
else
{
try
{
if (false) throw new cli.System.ArgumentOutOfRangeException();
for (;;)
{
try
{
if (false) throw new cli.System.IO.IOException();
if (false) throw new cli.System.ObjectDisposedException("");
fs.Lock(pos, size);
return shared ? RET_EX_LOCK : LOCKED;
}
catch (cli.System.IO.IOException x)
{
if (!blocking)
{
return NO_LOCK;
}
cli.System.Threading.Thread.Sleep(100);
}
catch (cli.System.ObjectDisposedException x)
{
throw new IOException(x.getMessage());
}
}
}
catch (cli.System.ArgumentOutOfRangeException x)
{
throw new IOException(x.getMessage());
}
}
}
