Clifford Yapp
6d7e383ed2
Track indexed record bounds and expose the source-byte footprint of materialized instances in cache statistics. Avoid promoting batch-owned cache hits during reference resolution.
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
#ifndef INSTMGRHELPER_H
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#define INSTMGRHELPER_H
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#include <sc_export.h>
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#include "clstepcore/mgrnode.h"
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#include "cllazyfile/lazyInstMgr.h"
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#include "clstepcore/instmgr.h"
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/**
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* \file instMgrHelper.h helper classes for the lazyInstMgr. Allows use of SDAI_Application_instance class
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* without modification.
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*/
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/**
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* This class is used when creating SDAI_Application_instance's and using a lazyInstMgr. It is returned
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* by instMgrAdapter. SDAI_Application_instance only uses the GetSTEPentity function.
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*/
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class SC_LAZYFILE_EXPORT mgrNodeHelper: public MgrNodeBase {
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protected:
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lazyInstMgr * _lim;
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instanceID _id;
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public:
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mgrNodeHelper( lazyInstMgr * lim ) {
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_lim = lim;
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_id = 0;
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prev = next = 0;
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}
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inline void setInstance( instanceID id ) {
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_id = id;
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}
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inline SDAI_Application_instance * GetSTEPentity() {
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/* Attribute resolution must not convert a batch-owned cache hit
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* into a process-lifetime retained instance. */
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return _lim->loadInstance( _id, true, false );
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}
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};
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/**
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* This class is used when creating SDAI_Application_instance's and using a lazyInstMgr.
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*
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* Instances need an InstMgr to look up the instances they refer to. This class pretends to be a normal InstMgr;
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* when an instance is looked up, this uses lazyInstMgr to load it, and then returns a pointer to it.
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*/
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class SC_LAZYFILE_EXPORT instMgrAdapter: public InstMgrBase {
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protected:
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mgrNodeHelper _mn;
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public:
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instMgrAdapter( lazyInstMgr * lim ): InstMgrBase(), _mn( lim ) {}
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inline mgrNodeHelper * FindFileId( int fileId ) {
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//TODO check if fileId exists. if not, return null
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_mn.setInstance( fileId );
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return &_mn;
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}
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};
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#endif //INSTMGRHELPER_H
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