226 lines
7.9 KiB
C#
226 lines
7.9 KiB
C#
// SignalClosure.cs - signal marshaling class
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//
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// Authors: Mike Kestner <mkestner@novell.com>
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//
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// Copyright (c) 2008 Novell, Inc.
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of version 2 of the Lesser GNU General
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// Public License as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this program; if not, write to the
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// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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namespace GLib {
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using System;
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using System.Collections;
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using System.Runtime.InteropServices;
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internal class ClosureInvokedArgs : EventArgs {
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EventArgs args;
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GLib.Object obj;
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public ClosureInvokedArgs (GLib.Object obj, EventArgs args)
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{
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this.obj = obj;
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this.args = args;
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}
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public EventArgs Args {
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get {
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return args;
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}
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}
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public GLib.Object Target {
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get {
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return obj;
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}
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}
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}
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struct GClosure {
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public long fields;
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public IntPtr marshaler;
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public IntPtr data;
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public IntPtr notifiers;
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}
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internal delegate void ClosureInvokedHandler (object o, ClosureInvokedArgs args);
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internal class SignalClosure : IDisposable {
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IntPtr handle;
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IntPtr raw_closure;
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string name;
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uint id = UInt32.MaxValue;
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System.Type args_type;
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Delegate custom_marshaler;
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GCHandle gch;
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static Hashtable closures = new Hashtable ();
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public SignalClosure (IntPtr obj, string signal_name, System.Type args_type)
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{
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raw_closure = g_closure_new_simple (Marshal.SizeOf (typeof (GClosure)), IntPtr.Zero);
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g_closure_set_marshal (raw_closure, Marshaler);
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g_closure_add_finalize_notifier (raw_closure, IntPtr.Zero, Notify);
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closures [raw_closure] = this;
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handle = obj;
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name = signal_name;
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this.args_type = args_type;
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}
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public SignalClosure (IntPtr obj, string signal_name, Delegate custom_marshaler, Signal signal)
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{
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gch = GCHandle.Alloc (signal);
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raw_closure = g_cclosure_new (custom_marshaler, (IntPtr) gch, Notify);
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closures [raw_closure] = this;
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handle = obj;
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name = signal_name;
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this.custom_marshaler = custom_marshaler;
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}
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public event EventHandler Disposed;
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public event ClosureInvokedHandler Invoked;
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public void Connect (bool is_after)
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{
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IntPtr native_name = GLib.Marshaller.StringToPtrGStrdup (name);
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id = g_signal_connect_closure (handle, native_name, raw_closure, is_after);
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GLib.Marshaller.Free (native_name);
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}
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public void Disconnect ()
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{
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if (id != UInt32.MaxValue && g_signal_handler_is_connected (handle, id))
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g_signal_handler_disconnect (handle, id);
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}
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public void Dispose ()
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{
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Disconnect ();
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closures.Remove (raw_closure);
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if (custom_marshaler != null)
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gch.Free ();
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custom_marshaler = null;
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if (Disposed != null)
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Disposed (this, EventArgs.Empty);
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GC.SuppressFinalize (this);
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}
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public void Invoke (ClosureInvokedArgs args)
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{
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if (Invoked == null)
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return;
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Invoked (this, args);
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}
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static ClosureMarshal marshaler;
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static ClosureMarshal Marshaler {
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get {
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if (marshaler == null)
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marshaler = new ClosureMarshal (MarshalCallback);
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return marshaler;
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}
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}
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[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
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delegate void ClosureMarshal (IntPtr closure, IntPtr return_val, uint n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data);
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static void MarshalCallback (IntPtr raw_closure, IntPtr return_val, uint n_param_vals, IntPtr param_values, IntPtr invocation_hint, IntPtr marshal_data)
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{
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string message = String.Empty;
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try {
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SignalClosure closure = closures [raw_closure] as SignalClosure;
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message = "Marshaling " + closure.name + " signal";
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Value objval = (Value) Marshal.PtrToStructure (param_values, typeof (Value));
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GLib.Object __obj = objval.Val as GLib.Object;
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if (__obj == null)
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return;
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if (closure.args_type == typeof (EventArgs)) {
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closure.Invoke (new ClosureInvokedArgs (__obj, EventArgs.Empty));
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return;
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}
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SignalArgs args = Activator.CreateInstance (closure.args_type, new object [0]) as SignalArgs;
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args.Args = new object [n_param_vals - 1];
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GLib.Value[] vals = new GLib.Value [n_param_vals - 1];
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for (int i = 1; i < n_param_vals; i++) {
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IntPtr ptr = new IntPtr (param_values.ToInt64 () + i * Marshal.SizeOf (typeof (Value)));
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vals [i - 1] = (Value) Marshal.PtrToStructure (ptr, typeof (Value));
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args.Args [i - 1] = vals [i - 1].Val;
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}
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ClosureInvokedArgs ci_args = new ClosureInvokedArgs (__obj, args);
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closure.Invoke (ci_args);
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for (int i = 1; i < n_param_vals; i++) {
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vals [i - 1].Update (args.Args [i - 1]);
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IntPtr ptr = new IntPtr (param_values.ToInt64 () + i * Marshal.SizeOf (typeof (Value)));
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Marshal.StructureToPtr (vals [i - 1], ptr, false);
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}
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if (return_val == IntPtr.Zero || args.RetVal == null)
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return;
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Value ret = (Value) Marshal.PtrToStructure (return_val, typeof (Value));
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ret.Val = args.RetVal;
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Marshal.StructureToPtr (ret, return_val, false);
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} catch (Exception e) {
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Console.WriteLine (message);
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ExceptionManager.RaiseUnhandledException (e, false);
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}
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}
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[UnmanagedFunctionPointer (CallingConvention.Cdecl)]
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delegate void ClosureNotify (IntPtr data, IntPtr closure);
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static void NotifyCallback (IntPtr data, IntPtr raw_closure)
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{
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SignalClosure closure = closures [raw_closure] as SignalClosure;
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if (closure != null)
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closure.Dispose ();
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}
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static ClosureNotify notify_handler;
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static ClosureNotify Notify {
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get {
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if (notify_handler == null)
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notify_handler = new ClosureNotify (NotifyCallback);
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return notify_handler;
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}
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}
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delegate IntPtr d_g_cclosure_new(Delegate cb, IntPtr user_data, ClosureNotify notify);
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static d_g_cclosure_new g_cclosure_new = FuncLoader.LoadFunction<d_g_cclosure_new>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_cclosure_new"));
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delegate IntPtr d_g_closure_new_simple(int closure_size, IntPtr dummy);
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static d_g_closure_new_simple g_closure_new_simple = FuncLoader.LoadFunction<d_g_closure_new_simple>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_closure_new_simple"));
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delegate void d_g_closure_set_marshal(IntPtr closure, ClosureMarshal marshaler);
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static d_g_closure_set_marshal g_closure_set_marshal = FuncLoader.LoadFunction<d_g_closure_set_marshal>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_closure_set_marshal"));
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delegate void d_g_closure_add_finalize_notifier(IntPtr closure, IntPtr dummy, ClosureNotify notify);
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static d_g_closure_add_finalize_notifier g_closure_add_finalize_notifier = FuncLoader.LoadFunction<d_g_closure_add_finalize_notifier>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_closure_add_finalize_notifier"));
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delegate uint d_g_signal_connect_closure(IntPtr obj, IntPtr name, IntPtr closure, bool is_after);
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static d_g_signal_connect_closure g_signal_connect_closure = FuncLoader.LoadFunction<d_g_signal_connect_closure>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_signal_connect_closure"));
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delegate void d_g_signal_handler_disconnect(IntPtr instance, uint handler);
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static d_g_signal_handler_disconnect g_signal_handler_disconnect = FuncLoader.LoadFunction<d_g_signal_handler_disconnect>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_signal_handler_disconnect"));
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delegate bool d_g_signal_handler_is_connected(IntPtr instance, uint handler);
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static d_g_signal_handler_is_connected g_signal_handler_is_connected = FuncLoader.LoadFunction<d_g_signal_handler_is_connected>(FuncLoader.GetProcAddress(GLibrary.Load(Library.GObject), "g_signal_handler_is_connected"));
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}
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}
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