Team Fortress 2 Source Code as on 22/4/2020
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Extra functionality on top of CGCClientSharedObjectCache for GCClients
//
//=============================================================================
#include "stdafx.h"
#include <time.h>
#include "gcsdk/gcclient_sharedobjectcache.h"
#include "gcsdk_gcmessages.pb.h"
#include <typeinfo>
namespace GCSDK
{
//#define SOCDebug(...) Msg( __VA_ARGS__ )
#define SOCDebug(...) ((void)0)
//----------------------------------------------------------------------------
// Purpose: constructor
//----------------------------------------------------------------------------
CGCClientSharedObjectContext::CGCClientSharedObjectContext( const CSteamID & steamIDOwner )
: m_steamIDOwner( steamIDOwner )
{
}
//----------------------------------------------------------------------------
// Purpose: Adds a new Listener to the cache. All objects in the cache will
// be sent as create messages to the new Listener
//----------------------------------------------------------------------------
bool CGCClientSharedObjectContext::BAddListener( ISharedObjectListener *pListener )
{
if( m_vecListeners.HasElement( pListener ) )
return false;
m_vecListeners.AddToTail( pListener );
return true;
}
//----------------------------------------------------------------------------
// Purpose: Removes a Listener from the cache. All objects in the cache
// will have destroy messages sent for them to the new Listener.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectContext::BRemoveListener( ISharedObjectListener *pListener )
{
return m_vecListeners.FindAndRemove( pListener );
}
//----------------------------------------------------------------------------
// Purpose: Send created/updated/destroyed calls on to all the listeners in the
// context
//----------------------------------------------------------------------------
void CGCClientSharedObjectContext::SOCreated( const CSharedObject *pObject, ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->SOCreated( m_steamIDOwner, pObject, eEvent );
}
}
void CGCClientSharedObjectContext::PreSOUpdate( ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->PreSOUpdate( m_steamIDOwner, eEvent );
}
}
void CGCClientSharedObjectContext::SOUpdated( const CSharedObject *pObject, ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->SOUpdated( m_steamIDOwner, pObject, eEvent );
}
}
void CGCClientSharedObjectContext::PostSOUpdate( ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->PostSOUpdate( m_steamIDOwner, eEvent );
}
}
void CGCClientSharedObjectContext::SODestroyed( const CSharedObject *pObject, ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->SODestroyed( m_steamIDOwner, pObject, eEvent );
}
}
void CGCClientSharedObjectContext::SOCacheSubscribed( const CSteamID & steamIDOwner, ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->SOCacheSubscribed( steamIDOwner, eEvent );
}
}
void CGCClientSharedObjectContext::SOCacheUnsubscribed( const CSteamID & steamIDOwner, ESOCacheEvent eEvent ) const
{
tmZone( TELEMETRY_LEVEL0, TMZF_NONE, "%s", __FUNCTION__ );
FOR_EACH_VEC( m_vecListeners, nListener )
{
m_vecListeners[nListener]->SOCacheUnsubscribed( steamIDOwner, eEvent );
}
}
//----------------------------------------------------------------------------
// Purpose: Constructor
//----------------------------------------------------------------------------
CGCClientSharedObjectTypeCache::CGCClientSharedObjectTypeCache( int nTypeID, const CGCClientSharedObjectContext & context )
: m_context( context ), CSharedObjectTypeCache( nTypeID )
{
}
//----------------------------------------------------------------------------
// Purpose: Destructor
//----------------------------------------------------------------------------
CGCClientSharedObjectTypeCache::~CGCClientSharedObjectTypeCache()
{
}
//----------------------------------------------------------------------------
// Purpose: Parses a cache subscribed message.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectTypeCache::BParseCacheSubscribedMsg( const CMsgSOCacheSubscribed_SubscribedType & msg, CUtlVector<CSharedObject*> &vecCreatedObjects, CUtlVector<CSharedObject*> &vecUpdatedObjects, CUtlVector<CSharedObject*> &vecObjectsToDestroy )
{
CSharedObjectVec vecUntouchedObjects;
for ( uint32 i = 0; i < GetCount(); i++ )
{
vecUntouchedObjects.AddToTail( GetObject( i ) );
}
for( uint16 usObject = 0; usObject < msg.object_data_size(); usObject++ )
{
bool bUpdatedExisting = false;
CSharedObject *pObject = BCreateFromMsg( msg.object_data( usObject ).data(), msg.object_data( usObject ).size(), &bUpdatedExisting );
if ( pObject == NULL)
{
Assert( pObject );
return false;
}
// if an object was updated, remove it from the untouched list
if ( bUpdatedExisting )
{
int index = vecUntouchedObjects.Find( pObject );
if ( index != vecUntouchedObjects.InvalidIndex() )
{
vecUntouchedObjects[index] = NULL;
}
vecUpdatedObjects.AddToTail( pObject );
}
else
{
vecCreatedObjects.AddToTail( pObject );
}
}
// all objects that weren't in the SubscribedMsg should be destroyed
for ( int i = 0; i < vecUntouchedObjects.Count(); i++ )
{
if ( vecUntouchedObjects[i] == NULL )
continue;
CSharedObject *pObject = RemoveObject( *vecUntouchedObjects[i] );
Assert( pObject );
if( pObject )
vecObjectsToDestroy.AddToTail( pObject );
}
return true;
}
void CGCClientSharedObjectTypeCache::RemoveAllObjects( CUtlVector<CSharedObject*> &vecObjects )
{
// Go in reverse order to avoid O(n^2) shifting the items in the array
for ( int i = GetCount() - 1; i >= 0; i-- )
{
CSharedObject *pObject = RemoveObjectByIndex( i );
Assert( pObject );
if ( pObject )
vecObjects.AddToTail( pObject );
}
}
//----------------------------------------------------------------------------
// Purpose: Processes a received create message for an object of this type on
// the client/gameserver
//----------------------------------------------------------------------------
CSharedObject *CGCClientSharedObjectTypeCache::BCreateFromMsg( const void *pvData, uint32 unSize, bool *bUpdatedExisting )
{
CUtlBuffer bufCreate( pvData, unSize, CUtlBuffer::READ_ONLY );
CSharedObject *pNewObj = CSharedObject::Create( GetTypeID() );
Assert( pNewObj );
if( !pNewObj )
{
EmitError( SPEW_SHAREDOBJ, "Unable to create object of type %d\n", GetTypeID() );
return NULL;
}
if( !pNewObj->BParseFromMessage( bufCreate ) )
{
delete pNewObj;
return NULL;
}
// Existing object?
CSharedObject *pObj = FindSharedObject( *pNewObj );
if( pObj )
{
pObj->Copy( *pNewObj );
delete pNewObj;
if ( bUpdatedExisting )
{
*bUpdatedExisting = true;
}
return pObj;
}
// New object
AddObject( pNewObj );
if ( bUpdatedExisting )
{
*bUpdatedExisting = false;
}
return pNewObj;
}
//----------------------------------------------------------------------------
// Purpose: Processes a received destroy message for an object of this type on
// the client/gameserver
//----------------------------------------------------------------------------
bool CGCClientSharedObjectTypeCache::BDestroyFromMsg( const void *pvData, uint32 unSize )
{
CUtlBuffer bufDestroy( pvData, unSize, CUtlBuffer::READ_ONLY );
CSharedObject *pIndexObj = CSharedObject::Create( GetTypeID() );
if( !pIndexObj->BParseFromMessage( bufDestroy ) )
{
delete pIndexObj;
return false;
}
CSharedObject *pObject = RemoveObject( *pIndexObj );
if( pObject )
{
m_context.SODestroyed( pObject, eSOCacheEvent_Incremental );
delete pObject;
}
delete pIndexObj;
return true;
}
//----------------------------------------------------------------------------
// Purpose: Processes a received destroy message for an object of this type on
// the client/gameserver
//----------------------------------------------------------------------------
bool CGCClientSharedObjectTypeCache::BUpdateFromMsg( const void *pvData, uint32 unSize )
{
CUtlBuffer bufUpdate( pvData, unSize, CUtlBuffer::READ_ONLY );
CSharedObject *pIndexObj = CSharedObject::Create( GetTypeID() );
AssertMsg1( pIndexObj, "Unable to create index object of type %d", GetTypeID() );
if( !pIndexObj )
return false;
if( !pIndexObj->BParseFromMessage( bufUpdate ) )
{
delete pIndexObj;
return false;
}
CSharedObject *pObj = FindSharedObject( *pIndexObj );
bool bRet = false;
if( pObj )
{
bufUpdate.SeekGet( CUtlBuffer::SEEK_HEAD, 0 );
bRet = pObj->BUpdateFromNetwork( *pIndexObj );
m_context.SOUpdated( pObj, eSOCacheEvent_Incremental );
}
delete pIndexObj;
return bRet;
}
//----------------------------------------------------------------------------
// Purpose: Constructor
//----------------------------------------------------------------------------
CGCClientSharedObjectCache::CGCClientSharedObjectCache( const CSteamID & steamIDOwner )
: m_context( steamIDOwner ),
m_bInitialized( false ),
m_bSubscribed( false )
{
}
//----------------------------------------------------------------------------
// Purpose: Destructor
//----------------------------------------------------------------------------
CGCClientSharedObjectCache::~CGCClientSharedObjectCache()
{
}
//----------------------------------------------------------------------------
// Purpose: Process an incoming create message on a client/gameserver.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectCache::BParseCacheSubscribedMsg( const CMsgSOCacheSubscribed & msg )
{
// Assume all type caches will be untouched
CUtlVector<int> vecUntouchedTypes;
for ( int i = FirstTypeCacheIndex(); i != InvalidTypeCacheIndex(); i = NextTypeCacheIndex( i ) )
{
CSharedObjectTypeCache *pTypeCache = GetTypeCacheByIndex( i );
if ( pTypeCache )
{
vecUntouchedTypes.AddToTail( pTypeCache->GetTypeID() );
}
}
// List of objects created, updated, and removed
CUtlVector<CSharedObject*> vecCreatedObjects;
CUtlVector<CSharedObject*> vecUpdatedObjects;
CUtlVector<CSharedObject*> vecObjectsToDestroy;
bool bResult = true;
// Scan types in message
for( uint16 usObject = 0; usObject < msg.objects_size(); usObject++ )
{
const CMsgSOCacheSubscribed_SubscribedType & msgType = msg.objects( usObject );
// Find or create the type
CGCClientSharedObjectTypeCache *pTypeCache = CreateTypeCache( msgType.type_id() );
if ( pTypeCache )
{
int index = vecUntouchedTypes.Find( pTypeCache->GetTypeID() );
if ( index != vecUntouchedTypes.InvalidIndex() )
{
vecUntouchedTypes[index] = -1;
}
}
Assert( pTypeCache );
if( !pTypeCache || !pTypeCache->BParseCacheSubscribedMsg( msgType, vecCreatedObjects, vecUpdatedObjects, vecObjectsToDestroy ) )
bResult = false;
}
// any type caches that weren't in the SubscribedMsg should be cleared
for ( int i = FirstTypeCacheIndex(); i != InvalidTypeCacheIndex(); i = NextTypeCacheIndex( i ) )
{
CGCClientSharedObjectTypeCache *pTypeCache = GetTypeCacheByIndex( i );
if ( vecUntouchedTypes.Find( pTypeCache->GetTypeID() ) != vecUntouchedTypes.InvalidIndex() )
{
pTypeCache->RemoveAllObjects( vecObjectsToDestroy );
}
}
// Which event is happening?
ESOCacheEvent eNotificationEvent = eSOCacheEvent_Subscribed;
if ( m_bSubscribed )
eNotificationEvent = eSOCacheEvent_Resubscribed;
// Set version, assuming we didn't have any problems. If we hit any problems,
// we want to force a refresh
if ( bResult )
SetVersion( msg.version() );
// Mark that the cache has been initialized by the server
m_bInitialized = true;
m_bSubscribed = true;
//
// Send notifications
//
// Initial cache subscribed
m_context.SOCacheSubscribed( GetOwner(), eNotificationEvent );
// Deletions
for ( int i = 0 ; i < vecObjectsToDestroy.Count() ; ++i )
{
m_context.SODestroyed( vecObjectsToDestroy[i], eNotificationEvent );
delete vecObjectsToDestroy[i];
}
// Updates
for ( int i = 0 ; i < vecUpdatedObjects.Count() ; ++i )
{
m_context.SOUpdated( vecUpdatedObjects[i], eNotificationEvent );
}
// Created
for ( int i = 0 ; i < vecCreatedObjects.Count() ; ++i )
{
m_context.SOUpdated( vecCreatedObjects[i], eNotificationEvent );
}
// Return true if everything parsed OK, or false
// if we had at least one failure
return bResult;
}
//----------------------------------------------------------------------------
// Purpose: Process an incoming create message on a client/gameserver.
//----------------------------------------------------------------------------
void CGCClientSharedObjectCache::NotifyUnsubscribe()
{
if ( m_bSubscribed )
{
m_bSubscribed = false;
m_context.SOCacheUnsubscribed( GetOwner(), eSOCacheEvent_Unsubscribed );
}
else
{
AssertMsg( m_bSubscribed, "GC Sending us Unsubscribed message when we weren't subscribed" ); // Might not be a bug, but something worth checking
}
}
//----------------------------------------------------------------------------
// Purpose: GC is telling us that the version we have is up-to-date,a nd we are subscribed
//----------------------------------------------------------------------------
void CGCClientSharedObjectCache::NotifyResubscribedUpToDate()
{
if ( !m_bSubscribed )
{
Assert( m_bInitialized );
m_bSubscribed = true;
m_context.SOCacheSubscribed( GetOwner(), eSOCacheEvent_Subscribed );
}
else
{
AssertMsg( m_bSubscribed, "Got NotifyResubscribedUpToDate when we were already subscribed?" ); // Might not be a bug, but something worth checking
}
}
//----------------------------------------------------------------------------
// Purpose: Process an incoming create message on a client/gameserver.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectCache::BCreateFromMsg( int nTypeID, const void *pvData, uint32 unSize )
{
// We should be subscribed
if ( !m_bInitialized || !m_bSubscribed )
{
// Note: We can go down and come back up without the GC knowing this.
// So this can happen
//Assert( m_bInitialized );
//Assert( m_bSubscribed );
//EmitWarning( SPEW_SHAREDOBJ, 1, "Received SOCache incremental update for cache we were not subscribed to (object type %d)\n", nTypeID );
}
// Locate / create the type cache
CGCClientSharedObjectTypeCache *pTypeCache = CreateTypeCache( nTypeID );
// Create the message or update existing
bool bUpdatedExisting = false;
CSharedObject *pObject = pTypeCache->BCreateFromMsg( pvData, unSize, &bUpdatedExisting );
if ( pObject == NULL )
return false;
// Send notifications to listeners
if ( bUpdatedExisting )
{
// This can happen --- see comment at the top of this function
//Assert( !bUpdatedExisting ); // shouldn't the GC know what it's already sent us? This is weird
m_context.SOUpdated( pObject, eSOCacheEvent_Incremental );
}
else
{
m_context.SOCreated( pObject, eSOCacheEvent_Incremental );
}
return true;
}
//----------------------------------------------------------------------------
// Purpose: Processes an incoming destroy message on a client/gameserver.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectCache::BDestroyFromMsg( int nTypeID, const void *pvData, uint32 unSize )
{
CGCClientSharedObjectTypeCache *pTypeCache = FindTypeCache( nTypeID );
if( pTypeCache )
{
return pTypeCache->BDestroyFromMsg( pvData, unSize );
}
else
{
return false;
}
}
//----------------------------------------------------------------------------
// Purpose: Processes an incoming update message on a client/gameserver.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectCache::BUpdateFromMsg( int nTypeID, const void *pvData, uint32 unSize )
{
CGCClientSharedObjectTypeCache *pTypeCache = FindTypeCache( nTypeID );
if( pTypeCache )
{
return pTypeCache->BUpdateFromMsg( pvData, unSize );
}
else
{
return false;
}
}
//----------------------------------------------------------------------------
// Purpose: Adds a listener object to be notified of object changes in this
// cache. The shared object cache does not own this object and will
// not free it.
//----------------------------------------------------------------------------
void CGCClientSharedObjectCache::AddListener( ISharedObjectListener *pListener )
{
Assert( pListener );
if ( !m_context.BAddListener( pListener ) )
return; // was already listening, no action needed
SOCDebug( "[%s] Adding listener %s\n", GetOwner().Render(), typeid( *pListener ).name() );
// If we're already subscribed, then immediately send notifications
if( BIsSubscribed() )
{
pListener->SOCacheSubscribed( GetOwner(), eSOCacheEvent_ListenerAdded );
for ( int i = FirstTypeCacheIndex(); i != InvalidTypeCacheIndex(); i = NextTypeCacheIndex( i ) )
{
CGCClientSharedObjectTypeCache *pTypeCache = GetTypeCacheByIndex( i );
for ( uint32 j = 0 ; j < pTypeCache->GetCount() ; ++j )
{
CSharedObject *pObject = pTypeCache->GetObject( j );
pListener->SOCreated( GetOwner(), pObject, eSOCacheEvent_ListenerAdded );
}
}
}
}
//----------------------------------------------------------------------------
// Purpose: Removes a listener object from the list to be notified of changes
// to this object cache.
//----------------------------------------------------------------------------
bool CGCClientSharedObjectCache::RemoveListener( ISharedObjectListener *pListener )
{
Assert( pListener );
if ( !m_context.BRemoveListener( pListener ) )
return false; // wasn't already listening, nothing to do
SOCDebug( "[%s] Removing listener %s\n", GetOwner().Render(), typeid( *pListener ).name() );
// If we were subscribed, then the listener's last subscribe notification
// was a "you are subscribed." Send him an unsubscribed notification
// so he doesn't think he's still subscribed.
if( BIsSubscribed() )
{
pListener->SOCacheUnsubscribed( GetOwner(), eSOCacheEvent_ListenerRemoved );
}
return true;
}
} // namespace GCSDK