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Fixed glib source double removal (#327)

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Fixed glib source double removal then using Source.Remove (Timeout.Remove, Idle.Remove).
I don't know if fix is correct or safe, but it solves problem that you can test in TimerDemo section from samples.

Repro:
If on Windows you should enable console in samples: <OutputType>Exe</OutputType>
Go to TimerDemo section and press buttons:

1. Add timer
2. Remove timer by handler
3. GC - no error in console

1. Add timer
2. Remove timer
3. GC - error in console "GLib-CRITICAL **: 20:29:41.579: Source ID 123 was not found when attempting to remove it"
This commit is contained in:
zii-dmg 2022-01-27 23:49:10 +03:00 committed by GitHub
parent 97ceebe10f
commit 0c5bd3f471
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
4 changed files with 109 additions and 20 deletions
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23
Source/Libs/GLibSharp/DestroyNotify.cs
View file

@ -47,6 +47,27 @@ namespace GLib {
return release_gchandle;
}
}
static void ReleaseSourceProxy (IntPtr data)
{
if (data == IntPtr.Zero)
return;
GCHandle gch = (GCHandle)data;
if (gch.Target is SourceProxy proxy) {
lock (proxy)
proxy.Dispose ();
}
gch.Free();
}
static DestroyNotify release_sourceproxy;
public static DestroyNotify SourceProxyNotifyHandler {
get {
if (release_sourceproxy == null)
release_sourceproxy = new DestroyNotify (ReleaseSourceProxy);
return release_sourceproxy;
}
}
}
}

10
Source/Libs/GLibSharp/Idle.cs
View file

@ -48,15 +48,7 @@ namespace GLib {
{
try {
IdleHandler idle_handler = (IdleHandler) real_handler;
bool cont = idle_handler ();
if (!cont)
{
lock (this)
{
Dispose();
}
}
return cont;
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
@ -80,7 +72,7 @@ namespace GLib {
{
var gch = GCHandle.Alloc(p);
var userData = GCHandle.ToIntPtr(gch);
p.ID = g_idle_add_full (priority, (IdleHandlerInternal) p.proxy_handler, userData, DestroyHelper.NotifyHandler);
p.ID = g_idle_add_full (priority, (IdleHandlerInternal) p.proxy_handler, userData, DestroyHelper.SourceProxyNotifyHandler);
}
return p.ID;

12
Source/Libs/GLibSharp/Timeout.cs
View file

@ -46,15 +46,7 @@ namespace GLib {
{
try {
TimeoutHandler timeout_handler = (TimeoutHandler) real_handler;
bool cont = timeout_handler ();
if (!cont)
{
lock (this)
{
Dispose();
}
}
return cont;
} catch (Exception e) {
ExceptionManager.RaiseUnhandledException (e, false);
@ -76,7 +68,7 @@ namespace GLib {
{
var gch = GCHandle.Alloc(p);
var userData = GCHandle.ToIntPtr(gch);
p.ID = g_timeout_add_full (priority, interval, (TimeoutHandlerInternal) p.proxy_handler, userData, DestroyHelper.NotifyHandler);
p.ID = g_timeout_add_full (priority, interval, (TimeoutHandlerInternal) p.proxy_handler, userData, DestroyHelper.SourceProxyNotifyHandler);
}
return p.ID;
@ -103,7 +95,7 @@ namespace GLib {
{
var gch = GCHandle.Alloc(p);
var userData = GCHandle.ToIntPtr(gch);
p.ID = g_timeout_add_seconds_full (priority, interval, (TimeoutHandlerInternal) p.proxy_handler, userData, DestroyHelper.NotifyHandler);
p.ID = g_timeout_add_seconds_full (priority, interval, (TimeoutHandlerInternal) p.proxy_handler, userData, DestroyHelper.SourceProxyNotifyHandler);
}
return p.ID;

84
Source/Samples/Sections/Miscellaneous/TimerSection.cs Normal file
View file

@ -0,0 +1,84 @@
using System;
using System.Collections.Generic;
using Gtk;
namespace Samples
{
[Section(ContentType = typeof(TimerDemo), Category = Category.Miscellaneous)]
class TimerSection : Box
{
public TimerSection() : base(Orientation.Horizontal, 3)
{
Valign = Align.Start;
TimerDemo.Create(this);
}
}
static class TimerDemo
{
public static void Create(Box box)
{
List<uint> timers = new List<uint>();
bool removeByHandler = false;
var btnAddTimer = new Button() { Label = "Add timer" };
btnAddTimer.Clicked += delegate
{
uint id = 0;
id = GLib.Timeout.Add(500, () =>
{
ApplicationOutput.WriteLine("Timer tick " + id);
if (removeByHandler)
{
removeByHandler = false;
timers.Remove(id);
ApplicationOutput.WriteLine("Remove timer from handler " + id);
return false;
}
return true;
});
timers.Add(id);
ApplicationOutput.WriteLine("Add timer " + id);
};
var btnRemoveTimer = new Button() { Label = "Remove timer" };
btnRemoveTimer.Clicked += delegate
{
if (timers.Count == 0)
return;
uint id = timers[0];
timers.RemoveAt(0);
GLib.Timeout.Remove(id);
ApplicationOutput.WriteLine("Remove timer " + id);
};
var btnRemoveTimerByHandler = new Button() { Label = "Remove timer by handler" };
btnRemoveTimerByHandler.Clicked += delegate
{
if (timers.Count == 0)
return;
removeByHandler = true;
ApplicationOutput.WriteLine("Remove timer by handler");
};
var btnGc = new Button() { Label = "GC" };
btnGc.Clicked += delegate
{
ApplicationOutput.WriteLine("GC");
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
};
box.PackStart(btnAddTimer, false, false, 0);
box.PackStart(btnRemoveTimer, false, false, 0);
box.PackStart(btnRemoveTimerByHandler, false, false, 0);
box.PackStart(btnGc, false, false, 0);
}
}
}