ogb912/opensim
1
0
Fork 0
mirror of https://github.com/opensim/opensim.git synced 2026-08-10 19:36:07 +08:00
Code Issues Packages Projects Releases Wiki Activity

Fix recent regression where a race condition meant SP.MakeRootAgent() would sometimes look to start attachment scripts before ETM.HandleIncomingSceneObject() had added them.

Browse Source 
Probably a regression since ghosts branch merge on Nov 26 2014
This commit is contained in:
Justin Clark-Casey (justincc)
2014-12-17 00:21:58 +00:00
parent e50aac020f
commit e901253b49
2 changed files with 39 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
OpenSim/Region/Framework/Scenes/ScenePresence.cs
View File

@@ -1228,45 +1228,27 @@ namespace OpenSim.Region.Framework.Scenes
m_scene.SwapRootAgentCount(false);
// The initial login scene presence is already root when it gets here
// and it has already rezzed the attachments and started their scripts.
// We do the following only for non-login agents, because their scripts
// haven't started yet.
if (PresenceType == PresenceType.Npc || IsRealLogin(m_teleportFlags))
if (Scene.AttachmentsModule != null)
{
// Viewers which have a current outfit folder will actually rez their own attachments. However,
// viewers without (e.g. v1 viewers) will not, so we still need to make this call.
if (Scene.AttachmentsModule != null)
// The initial login scene presence is already root when it gets here
// and it has already rezzed the attachments and started their scripts.
// We do the following only for non-login agents, because their scripts
// haven't started yet.
if (PresenceType == PresenceType.Npc || IsRealLogin(m_teleportFlags))
{
// Viewers which have a current outfit folder will actually rez their own attachments. However,
// viewers without (e.g. v1 viewers) will not, so we still need to make this call.
WorkManager.RunJob(
"RezAttachments",
o => Scene.AttachmentsModule.RezAttachments(this),
null,
string.Format("Rez attachments for {0} in {1}", Name, Scene.Name));
}
}
else
{
// We need to restart scripts here so that they receive the correct changed events (CHANGED_TELEPORT
// and CHANGED_REGION) when the attachments have been rezzed in the new region. This cannot currently
// be done in AttachmentsModule.CopyAttachments(AgentData ad, IScenePresence sp) itself since we are
// not transporting the required data.
//
// We must take a copy of the attachments list here (rather than locking) to avoid a deadlock where a script in one of
// the attachments may start processing an event (which locks ScriptInstance.m_Script) that then calls a method here
// which needs to lock m_attachments. ResumeScripts() needs to take a ScriptInstance.m_Script lock to try to unset the Suspend status.
//
// FIXME: In theory, this deadlock should not arise since scripts should not be processing events until ResumeScripts().
// But XEngine starts all scripts unsuspended. Starting them suspended will not currently work because script rezzing
// is placed in an asynchronous queue in XEngine and so the ResumeScripts() call will almost certainly execute before the
// script is rezzed. This means the ResumeScripts() does absolutely nothing when using XEngine.
List<SceneObjectGroup> attachments = GetAttachments();
if (attachments.Count > 0)
else
{
WorkManager.RunJob(
"StartAttachmentScripts",
o => RestartAttachmentScripts(attachments),
"StartAttachmentScripts",
o => RestartAttachmentScripts(),
null,
string.Format("Start attachment scripts for {0} in {1}", Name, Scene.Name),
true);
@@ -1292,10 +1274,25 @@ namespace OpenSim.Region.Framework.Scenes
return true;
}
private void RestartAttachmentScripts(List<SceneObjectGroup> attachments)
private void RestartAttachmentScripts()
{
// We need to restart scripts here so that they receive the correct changed events (CHANGED_TELEPORT
// and CHANGED_REGION) when the attachments have been rezzed in the new region. This cannot currently
// be done in AttachmentsModule.CopyAttachments(AgentData ad, IScenePresence sp) itself since we are
// not transporting the required data.
//
// We must take a copy of the attachments list here (rather than locking) to avoid a deadlock where a script in one of
// the attachments may start processing an event (which locks ScriptInstance.m_Script) that then calls a method here
// which needs to lock m_attachments. ResumeScripts() needs to take a ScriptInstance.m_Script lock to try to unset the Suspend status.
//
// FIXME: In theory, this deadlock should not arise since scripts should not be processing events until ResumeScripts().
// But XEngine starts all scripts unsuspended. Starting them suspended will not currently work because script rezzing
// is placed in an asynchronous queue in XEngine and so the ResumeScripts() call will almost certainly execute before the
// script is rezzed. This means the ResumeScripts() does absolutely nothing when using XEngine.
List<SceneObjectGroup> attachments = GetAttachments();
m_log.DebugFormat(
"[SCENE PRESENCE]: Restarting scripts in attachments for {0} in {1}", Name, Scene.Name);
"[SCENE PRESENCE]: Restarting scripts in {0} attachments for {1} in {2}", attachments.Count, Name, Scene.Name);
// Resume scripts
foreach (SceneObjectGroup sog in attachments)