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namespace DBus
{
using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Reflection;
using System.IO;
using System.Collections;
public class Connection
{
/// <summary>
/// A pointer to the underlying Connection structure
/// </summary>
private IntPtr rawConnection;
/// <summary>
/// The current slot number
/// </summary>
private static int slot = -1;
private int timeout = -1;
internal Connection(IntPtr rawConnection)
{
RawConnection = rawConnection;
}
public Connection(string address)
{
// the assignment bumps the refcount
Error error = new Error();
error.Init();
RawConnection = dbus_connection_open(address, ref error);
if (RawConnection != IntPtr.Zero) {
dbus_connection_unref(RawConnection);
} else {
throw new DBusException(error);
}
SetupWithMain();
}
public void Flush()
{
dbus_connection_flush(RawConnection);
}
public void SetupWithMain()
{
dbus_connection_setup_with_g_main(RawConnection, IntPtr.Zero);
}
~Connection ()
{
if (RawConnection != IntPtr.Zero)
{
dbus_connection_disconnect(rawConnection);
}
RawConnection = IntPtr.Zero; // free the native object
}
internal static Connection Wrap(IntPtr rawConnection)
{
if (slot > -1) {
// Maybe we already have a Connection object associated with
// this rawConnection then return it
IntPtr rawThis = dbus_connection_get_data (rawConnection, slot);
if (rawThis != IntPtr.Zero) {
return (DBus.Connection) ((GCHandle)rawThis).Target;
}
}
// If it doesn't exist then create a new connection around it
return new Connection(rawConnection);
}
public string UniqueName
{
get
{
return Marshal.PtrToStringAnsi (dbus_bus_get_unique_name (RawConnection));
}
}
public int Timeout
{
get
{
return this.timeout;
}
set
{
this.timeout = value;
}
}
private int Slot
{
get
{
if (slot == -1)
{
// We need to initialize the slot
if (!dbus_connection_allocate_data_slot (ref slot))
throw new OutOfMemoryException ();
Debug.Assert (slot >= 0);
}
return slot;
}
}
internal IntPtr RawConnection
{
get
{
return rawConnection;
}
set
{
if (value == rawConnection)
return;
if (rawConnection != IntPtr.Zero)
{
// Get the reference to this
IntPtr rawThis = dbus_connection_get_data (rawConnection, Slot);
Debug.Assert (rawThis != IntPtr.Zero);
// Blank over the reference
dbus_connection_set_data (rawConnection, Slot, IntPtr.Zero, IntPtr.Zero);
// Free the reference
((GCHandle) rawThis).Free();
// Unref the connection
dbus_connection_unref(rawConnection);
}
this.rawConnection = value;
if (rawConnection != IntPtr.Zero)
{
GCHandle rawThis;
dbus_connection_ref (rawConnection);
// We store a weak reference to the C# object on the C object
rawThis = GCHandle.Alloc (this, GCHandleType.WeakTrackResurrection);
dbus_connection_set_data(rawConnection, Slot, (IntPtr) rawThis, IntPtr.Zero);
}
}
}
[DllImport("dbus-glib-1")]
private extern static void dbus_connection_setup_with_g_main(IntPtr rawConnection,
IntPtr rawContext);
[DllImport ("dbus-1")]
private extern static IntPtr dbus_connection_open (string address, ref Error error);
[DllImport ("dbus-1")]
private extern static void dbus_connection_unref (IntPtr ptr);
[DllImport ("dbus-1")]
private extern static void dbus_connection_ref (IntPtr ptr);
[DllImport ("dbus-1")]
private extern static bool dbus_connection_allocate_data_slot (ref int slot);
[DllImport ("dbus-1")]
private extern static void dbus_connection_free_data_slot (ref int slot);
[DllImport ("dbus-1")]
private extern static bool dbus_connection_set_data (IntPtr ptr,
int slot,
IntPtr data,
IntPtr free_data_func);
[DllImport ("dbus-1")]
private extern static void dbus_connection_flush (IntPtr ptr);
[DllImport ("dbus-1")]
private extern static IntPtr dbus_connection_get_data (IntPtr ptr,
int slot);
[DllImport ("dbus-1")]
private extern static void dbus_connection_disconnect (IntPtr ptr);
[DllImport ("dbus-1")]
private extern static IntPtr dbus_bus_get_unique_name (IntPtr ptr);
}
}
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