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579 lines
19 KiB
579 lines
19 KiB
/*===================================================================
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Microsoft Denali
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Microsoft Confidential.
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Copyright 1996 Microsoft Corporation. All Rights Reserved.
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Component: Script Manager
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File: ScrptMgr.h
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Owner: AndrewS
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This file contains the declarations for the Script Manager, ie. siting an
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ActiveX Scripting engine (in our case VBScript) for Denali.
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===================================================================*/
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#ifndef __ScrptMgr_h
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#define __ScrptMgr_h
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#include <dispex.h>
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#include "activscp.h"
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#include "activdbg.h"
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#include "hostinfo.h"
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#include "util.h"
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#include "HitObj.h"
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#include "hashing.h"
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#include "memcls.h"
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#include "scrpteng.h"
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typedef SCRIPTSTATE ENGINESTATE; // Uninited, Loaded, etc
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typedef CLSID PROGLANG_ID;
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const CBPROGLANG_ID = sizeof(PROGLANG_ID);
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class CActiveScriptSite;
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class CActiveScriptEngine;
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class CASEElem;
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class CScriptingNamespace;
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class CAppln;
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// SMHash depends on stuff in this include file which must be defined first.
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#include "SMHash.h"
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/*
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*
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*
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* C S c r i p t M a n a g e r
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*
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*
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* Manages script engines, potentially caching them for future use,
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* hands script engines to callers for use.
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*
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*/
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class CScriptManager
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{
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private:
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// private data members
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BOOLB m_fInited; // Are we initialized?
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/*
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* Script Engines that are not in use can be reused and
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* go on the Free Script Queue. It is a queue so we can
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* discard the oldest if we need to.
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*
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* Engines that are in use cant be reused. When an engine
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* is handed out to be used, it is removed from the FSQ. When a thread
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* is done using an engine, it calls ReturnEngineToCache to put it back on
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* the FSQ. If the Queue is at max length, the oldest engine on the queue is
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* freed at that point. The one returned is put on the front of the queue.
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*
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* We also maintain a Running Script List. This is needed so that if we
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* are told to flush a given script from our cache, we can "zombify" any
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* running scripts that have that script in them (so they will be discarded
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* when they are done running.)
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*
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* Additional note: Though we cant have multiple users of the *same* runing engine
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* we can "clone" a running engine. If we get two simulanteous requests for Foo.ASP
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* we expect that it will be faster to clone the second one from the first one than
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* to create a second engine for the second request. Thus, the RSL will be searched
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* for a given engine to clone if no suitable engine is found on the FSQ.
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*
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* DEBUGGING NOTE:
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* Once the debugger asks a script engine for a code context cookie, we cannot
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* ever let go of the script engine until the debugger detaches. Therefore, we
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* don't cache scripts in the FSQ if debugging is active. Instead, the scripts
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* are placed in the template when execution is finished, there to be doled back
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* out when that engine is needed by the debugging engine.
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*
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* CONSIDER:
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* We could be smarter about this, and cache scripts UNTIL the debugger either
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* a. Asks for a code context from a document context, or
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* b. Calls GetDocumentContextFromPosition, in which case, the debugger
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* got a code context "behind our virtual backs".
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*
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* If we don't do this, we could, at the very least, only implement this
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* debugging behavior when a debugger attaches to our application.
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* (i.e. stop caching on attach, then on detach, resume caching, and also
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* free scripts that the template objects are holding onto.)
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*/
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CSMHash m_htFSQ; // Free Script Queue
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CRITICAL_SECTION m_csFSQ; // Serialize access to FSQ
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CSMHash m_htRSL; // Running Script List
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CRITICAL_SECTION m_csRSL; // Serialize access to RSL
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CHashTable m_hTPLL; // Hash table of language engine classid's
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CRITICAL_SECTION m_cSPLL; // Serialize access to PLL
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DWORD m_idScriptKiller; // Script killer sched workitem id
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DWORD m_msecScriptKillerTimeout;// Current script killer timeout
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// private methods
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HRESULT UnInitASEElems();
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HRESULT UnInitPLL();
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HRESULT AddProgLangToPLL(CHAR *szProgLangName, PROGLANG_ID progLangId);
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// script killer
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static VOID WINAPI ScriptKillerSchedulerCallback(VOID *pv);
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public:
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// public methods
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CScriptManager();
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~CScriptManager();
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HRESULT Init();
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HRESULT UnInit();
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// Resolves a language name into a prog lang id, adding to engine list (m_hTPLL) if not already there
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HRESULT ProgLangIdOfLangName(LPCSTR szProgLang, PROGLANG_ID *pProgLangId);
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// Return an engine, preferably filled with the script for the given template/language
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HRESULT GetEngine( LCID lcid, // The system language to use
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PROGLANG_ID& progLangId, // prog lang id of the script
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LPCTSTR szTemplateName, // Template we want an engine for
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CHitObj *pHitObj, // Hit obj to use in this engine
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CScriptEngine **ppSE, // Returned script engine
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ENGINESTATE *pdwState, // Current state of the engine
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CTemplate *pTemplate, // template (debug document)
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DWORD dwSourceContext); // script engine index
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HRESULT ReturnEngineToCache(CScriptEngine **, CAppln *);
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// Throw out any cached engines containing a given template
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// (presumably the script changed on disk so the cache is obsolete.)
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HRESULT FlushCache(LPCTSTR szTemplateName); // Template to throw out of the cache
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HRESULT FlushAll(); // Clear the entire FSQ
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HRESULT KillOldEngines(BOOLB fKillNow = FALSE); // Kill expired scripting engines
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// Bug 1140: Called prior to shutting down script manager to make sure RSL is empty
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HRESULT EmptyRunningScriptList();
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// Adjust (shorten) script killer timeout
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HRESULT AdjustScriptKillerTimeout(DWORD msecNewTimeout);
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// Find running script that corresponds to a template (in one of its script blocks)
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IActiveScriptDebug *GetDebugScript(CTemplate *pTemplate, DWORD dwSourceContext);
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private:
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HRESULT FindEngineInList(LPCTSTR szTemplateName, PROGLANG_ID progLangId, DWORD dwInstanceID, BOOL fFSQ, CASEElem **ppASEElem);
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HRESULT FindASEElemInList(CActiveScriptEngine *pASE, BOOL fFSQ, CASEElem **ppASEElem);
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// For threading a FIFO queue through the hash table
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HRESULT AddToFSQ(CASEElem *pASEElem);
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HRESULT CheckFSQLRU();
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#ifdef DBG
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virtual void AssertValid() const;
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#else
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virtual void AssertValid() const {}
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#endif
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};
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extern CScriptManager g_ScriptManager;
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/*
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*
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*
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* C A c t i v e S c r i p t E n g i n e
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*
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* Object defining methods required to host an ActiveXScripting engine &
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* service requests to that engine.
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*
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*/
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class CActiveScriptEngine :
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public CScriptEngine,
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public IActiveScriptSite,
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public IActiveScriptSiteDebug,
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public IHostInfoProvider
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{
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private:
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// private data members
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UINT m_cRef; // Reference count
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IDispatch *m_pDisp; // IDispatch interface on script
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CHitObj *m_pHitObj; // The hit object contains a list of objects for this run
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LPTSTR m_szTemplateName; // The name of the template this engine has loaded
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DWORD m_dwInstanceID; // server instance ID of template this engine has loaded
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TCHAR m_szTemplateNameBuf[64]; // Buffer for short templates to fit to avoid allocs
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PROGLANG_ID m_proglang_id; // What programming language?
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LCID m_lcid; // what system language
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IActiveScript *m_pAS; // The script object sited here
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IActiveScriptParse *m_pASP; // The script object parser
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IHostInfoUpdate *m_pHIUpdate;// Interface for advising the script that we have new host info
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time_t m_timeStarted; // Time when the script engine was handed out last.
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CTemplate *m_pTemplate; // template that acts as debugging document
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DWORD m_dwSourceContext; // "Cookie" value which is really script engine
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DWORD m_fInited : 1; // Have we been inited?
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DWORD m_fZombie : 1; // Do we need to be deleted on last use
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DWORD m_fScriptLoaded : 1; // Have we been called with script to load yet? (Used for clone)
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DWORD m_fObjectsLoaded : 1; // Have we been called with a set of objects yet? (Used for clone)
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DWORD m_fBeingDebugged : 1; // Is this script being debugged now?
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DWORD m_fTemplateNameAllocated : 1; // Is name allocated? (need to free?)
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/*
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* NOTE: ActiveXScripting:
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* ActiveXScripting had an undone such that the excepinfo filled in in InteruptScript
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* was not passed to OnScriptError. We would have liked to use that mechanism to cause
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* correct error loging (or suppression) if we interrupt a script. However,
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* since ActiveXScripting wasnt passing the info, we didnt know. We wrote this code to
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* handle it ourselves. They have now fixed it, but the mechanism we implemented works very
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* well, so we are not going to change it.
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*/
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DWORD m_fScriptAborted : 1; // The script did a Response.End
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DWORD m_fScriptTimedOut : 1; // We killed the script on timeout
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DWORD m_fScriptHadError : 1; // The script had an error while running. Transacted script should autoabort
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/*
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* BUG 1225: If there is a GPF running a script, we shouldnt reuse the engine
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*/
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DWORD m_fCorrupted : 1; // Might the engine be "unsafe" for reuse?
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// handle GetItemInfo() failure
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void HandleItemNotFound(LPCOLESTR pcszName);
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HRESULT StoreTemplateName(LPCTSTR szTemplateName);
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public:
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CActiveScriptEngine();
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~CActiveScriptEngine();
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HRESULT Init(
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PROGLANG_ID proglang_id,
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LPCTSTR szTemplateName,
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LCID lcid,
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CHitObj *pHitObj,
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CTemplate *pTemplate,
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DWORD dwSourceContext);
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HRESULT MakeClone(
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PROGLANG_ID proglang_id,
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LPCTSTR szTemplateName,
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LCID lcid,
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CHitObj *pHitObj,
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CTemplate *pTemplate,
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DWORD dwSourceContext,
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DWORD dwInstanceID,
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IActiveScript *pAS); // The cloned script engine
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HRESULT ReuseEngine(
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CHitObj *pHitObj,
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CTemplate *pTemplate,
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DWORD dwSourceContext,
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DWORD dwInstanceID
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);
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time_t TimeStarted();
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VOID SetTimeStarted(time_t timeStarted);
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BOOL FBeingDebugged(); // Is the script being debugged?
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VOID IsBeingDebugged(); // Notify script that it is being debugged
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HRESULT ResetToUninitialized();
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HRESULT GetASP();
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HRESULT GetIDisp();
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HRESULT GetIHostInfoUpdate();
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IActiveScript *GetActiveScript();
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LPTSTR SzTemplateName();
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BOOL FIsZombie();
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BOOL FIsCorrupted();
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PROGLANG_ID ProgLang_Id();
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DWORD DWInstanceID();
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BOOL FFullyLoaded();
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long GetTimeout();
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BOOL FScriptTimedOut();
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BOOL FScriptHadError();
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void GetDebugDocument(CTemplate **ppTemplate, DWORD *pdwSourceContext);
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/*
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* C S c r i p t E n g i n e M e t h o d s
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*/
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HRESULT AddScriptlet(LPCOLESTR wstrScript);
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HRESULT AddObjects(BOOL fPersistNames = TRUE);
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HRESULT AddAdditionalObject(LPWSTR strObjName, BOOL fPersistNames = TRUE);
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HRESULT AddScriptingNamespace();
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HRESULT Call(LPCOLESTR strEntryPoint);
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HRESULT CheckEntryPoint(LPCOLESTR strEntryPoint);
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HRESULT MakeEngineRunnable() { return(Call(NULL)); };
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HRESULT ResetScript() { return m_pAS? m_pAS->SetScriptState(SCRIPTSTATE_UNINITIALIZED) : E_FAIL; }
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VOID Zombify();
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HRESULT InterruptScript(BOOL fAbnormal = TRUE);
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HRESULT UpdateLocaleInfo(hostinfo hi);
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HRESULT TryCall(LPCOLESTR strEntryPoint);
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ULONG FinalRelease();
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/*
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* I U n k n o w n M e t h o d s
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*/
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STDMETHOD(QueryInterface)(REFIID riid, PVOID *ppvObject);
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STDMETHOD_(ULONG, AddRef)(VOID);
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STDMETHOD_(ULONG, Release)(VOID);
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/*
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* C A c t i v e S c r i p t S i t e M e t h o d s
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*/
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STDMETHOD(GetLCID)(LCID *plcid);
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STDMETHOD(GetItemInfo)(LPCOLESTR pcszName,
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DWORD dwReturnMask,
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IUnknown **ppiunkItem,
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ITypeInfo **ppti);
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STDMETHOD(GetDocVersionString)(BSTR *pszVersion);
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STDMETHOD(RequestItems)(BOOL fPersistNames = TRUE);
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STDMETHOD(RequestTypeLibs)(VOID);
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STDMETHOD(OnScriptTerminate)(const VARIANT *pvarResult,
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const EXCEPINFO *pexcepinfo);
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STDMETHOD(OnStateChange)(SCRIPTSTATE ssScriptState);
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STDMETHOD(OnScriptError)(IActiveScriptError __RPC_FAR *pscripterror);
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STDMETHOD(OnEnterScript)(VOID);
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STDMETHOD(OnLeaveScript)(VOID);
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/*
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* C A c t i v e S c r i p t S i t e D e b u g M e t h o d s
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*/
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STDMETHOD(GetDocumentContextFromPosition)(
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/* [in] */ DWORD_PTR dwSourceContext,
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/* [in] */ ULONG uCharacterOffset,
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/* [in] */ ULONG uNumChars,
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/* [out] */ IDebugDocumentContext **ppsc);
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STDMETHOD(GetApplication)(/* [out] */ IDebugApplication **ppda);
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STDMETHOD(GetRootApplicationNode)(/* [out] */ IDebugApplicationNode **);
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STDMETHOD(OnScriptErrorDebug)(
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/* [in] */ IActiveScriptErrorDebug *pErrorDebug,
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/* [out] */ BOOL *pfEnterDebugger,
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/* [out] */ BOOL *pfCallOnScriptErrorWhenContinuing);
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/*
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* IHostInfoProvider methods
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*/
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STDMETHOD(GetHostInfo)(hostinfo hostinfoRequest, void **ppvInfo);
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public:
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#ifdef DBG
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virtual void AssertValid() const;
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#else
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virtual void AssertValid() const {}
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#endif
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// Cache on per-class basis
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ACACHE_INCLASS_DEFINITIONS()
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};
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inline VOID CActiveScriptEngine::Zombify() { m_fZombie = TRUE; }
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inline BOOL CActiveScriptEngine::FFullyLoaded() { return(m_fScriptLoaded && m_fObjectsLoaded); }
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inline BOOL CActiveScriptEngine::FIsZombie() { return(m_fZombie); }
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inline BOOL CActiveScriptEngine::FIsCorrupted() { return(m_fCorrupted); }
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inline time_t CActiveScriptEngine::TimeStarted() { return(m_timeStarted); }
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inline VOID CActiveScriptEngine::SetTimeStarted(time_t timeStarted) { m_timeStarted = timeStarted; }
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inline IActiveScript *CActiveScriptEngine::GetActiveScript() { return(m_pAS); }
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inline LPTSTR CActiveScriptEngine::SzTemplateName() { return(m_szTemplateName); }
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inline PROGLANG_ID CActiveScriptEngine::ProgLang_Id() { return(m_proglang_id); }
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inline DWORD CActiveScriptEngine::DWInstanceID() { return(m_dwInstanceID); }
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inline BOOL CActiveScriptEngine::FBeingDebugged() { return(m_fBeingDebugged); } // Is the script being debugged?
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inline VOID CActiveScriptEngine::IsBeingDebugged() { m_fBeingDebugged = TRUE; }
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inline BOOL CActiveScriptEngine::FScriptTimedOut() { return m_fScriptTimedOut; }
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inline BOOL CActiveScriptEngine::FScriptHadError() { return m_fScriptHadError; }
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inline long CActiveScriptEngine::GetTimeout() { return m_fBeingDebugged? LONG_MAX : m_pHitObj->GetScriptTimeout(); }
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inline void CActiveScriptEngine::GetDebugDocument(CTemplate **ppTemplate, DWORD *pdwSourceContext)
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{
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if (ppTemplate) *ppTemplate = m_pTemplate;
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if (pdwSourceContext) *pdwSourceContext = m_dwSourceContext;
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}
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/*
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*
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*
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* C A S E E l e m
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*
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* Script element. For keeping lists and queues of script engines
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*
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*/
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class CASEElem : public CLruLinkElem
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{
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private:
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CActiveScriptEngine *m_pASE;
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public:
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CASEElem() : m_pASE(NULL) {}
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~CASEElem();
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HRESULT Init(CActiveScriptEngine *pASE);
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CActiveScriptEngine *PASE();
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// Cache on per-class basis
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ACACHE_INCLASS_DEFINITIONS()
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};
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inline CActiveScriptEngine *CASEElem::PASE() { return(m_pASE); }
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/*
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*
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*
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* C P L L E l e m
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*
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* Hash table list element for a Programming Language List.
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*
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*/
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class CPLLElem : public CLinkElem
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{
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private:
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PROGLANG_ID m_ProgLangId; // clsid for the language
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public:
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CPLLElem() : m_ProgLangId(CLSID_NULL) {};
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~CPLLElem();
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HRESULT Init(CHAR *szProgLangName, PROGLANG_ID progLangId);
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PROGLANG_ID ProgLangId();
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};
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inline PROGLANG_ID CPLLElem::ProgLangId() { return(m_ProgLangId); }
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/*
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*
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*
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* C S c r i p t i n g N a m e s p a c e
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*
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* We need to keep track of all of the names which different engines (and typeinfos)
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* contribute to the namespace. All of these names go into this object
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* which we give to each engine with the SCRIPTITEM_GLOBALMEMBERS flag. When
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* ActiveXScripting calls us back on GetIdsOfNames, we will call the engines
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* we have cached until we find the name. When AXS calls us with Invoke,
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* we will map the id to the appropriate engine and pass on the invoke
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*
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* Data structure note:
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* We implement the ScriptingNamespace with a linked list of arrays.
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* This gives reasonable access time and should minimize heap
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* fragmentation. In debug mode, the number of buckets is small to
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* excersize the resize code.
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*
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* NOTE: "ENGDISPMAX" should be a power of two - this will allow the optimizer
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* to optimize the integer divide and modulus operations with bit-ands and
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* shifts. However, the code does not assume that "ENGDISPMAX" is a power
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* of two.
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*/
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#ifdef DBG
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#define ENGDISPMAX 2
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#else
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#define ENGDISPMAX 32
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#endif
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typedef struct _engdisp
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{
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DISPID dispid; // the dispid that the engine really uses
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|
IDispatch *pDisp; // the engine to call for this dispid
|
|
IDispatchEx *pDispEx; // the engine to call for this dispid
|
|
} ENGDISP;
|
|
|
|
typedef struct _engdispbucket : CDblLink
|
|
{
|
|
ENGDISP rgEngDisp[ENGDISPMAX+1];
|
|
} ENGDISPBUCKET;
|
|
|
|
class CEngineDispElem : public CDblLink
|
|
{
|
|
public:
|
|
IDispatch *m_pDisp;
|
|
IDispatchEx *m_pDispEx;
|
|
|
|
// Cache on per-class basis
|
|
ACACHE_INCLASS_DEFINITIONS()
|
|
};
|
|
|
|
class CScriptingNamespace : public IDispatchEx
|
|
{
|
|
private:
|
|
ULONG m_cRef; // Reference count
|
|
BOOLB m_fInited;
|
|
CDblLink m_listSE; // List of scripting engines (list of CSEElem's)
|
|
UINT m_cEngDispMac;
|
|
CDblLink m_listEngDisp;
|
|
|
|
HRESULT CacheDispID(CEngineDispElem *pEngine, DISPID dispidEngine, DISPID *pdispidCached);
|
|
HRESULT FetchDispID(DISPID dispid, ENGDISP **ppEngDisp);
|
|
|
|
public:
|
|
// public methods
|
|
CScriptingNamespace();
|
|
~CScriptingNamespace();
|
|
|
|
HRESULT Init();
|
|
HRESULT UnInit();
|
|
HRESULT ReInit();
|
|
HRESULT AddEngineToNamespace(CActiveScriptEngine *pASE);
|
|
|
|
// IUnknown
|
|
STDMETHODIMP QueryInterface(REFIID, void **);
|
|
STDMETHODIMP_(ULONG) AddRef(void);
|
|
STDMETHODIMP_(ULONG) Release(void);
|
|
// IDispatch
|
|
STDMETHODIMP GetTypeInfoCount(UINT *);
|
|
STDMETHODIMP GetTypeInfo(UINT, LCID, ITypeInfo **);
|
|
STDMETHODIMP GetIDsOfNames(REFIID, OLECHAR **, UINT, LCID, DISPID *);
|
|
STDMETHODIMP Invoke(DISPID, REFIID, LCID, WORD,
|
|
DISPPARAMS *, VARIANT *, EXCEPINFO *, UINT *);
|
|
// IDispatchEx
|
|
STDMETHODIMP DeleteMemberByDispID(DISPID id);
|
|
STDMETHODIMP DeleteMemberByName(BSTR bstrName, DWORD grfdex);
|
|
STDMETHODIMP GetMemberName(DISPID id, BSTR *pbstrName);
|
|
STDMETHODIMP GetMemberProperties(DISPID id, DWORD grfdexFetch, DWORD *pgrfdex);
|
|
STDMETHODIMP GetNameSpaceParent(IUnknown **ppunk);
|
|
STDMETHODIMP GetNextDispID(DWORD grfdex, DISPID id, DISPID *pid);
|
|
STDMETHODIMP GetDispID(BSTR bstrName, DWORD grfdex, DISPID *pid);
|
|
STDMETHODIMP InvokeEx(DISPID id, LCID lcid, WORD wFlags, DISPPARAMS *pdp,
|
|
VARIANT *pVarRes, EXCEPINFO *pei, IServiceProvider *pspCaller);
|
|
|
|
public:
|
|
#ifdef DBG
|
|
VOID AssertValid() const;
|
|
#else
|
|
VOID AssertValid() const {}
|
|
#endif
|
|
|
|
// Cache on per-class basis
|
|
ACACHE_INCLASS_DEFINITIONS()
|
|
};
|
|
|
|
|
|
/*
|
|
*
|
|
*
|
|
* U t i l i t i e s
|
|
*
|
|
* General utility functions
|
|
*
|
|
*/
|
|
HRESULT WrapTypeLibs(ITypeLib **prgpTypeLib, UINT cTypeLibs, IDispatch **ppDisp);
|
|
|
|
#endif // __ScrptMgr_h
|
|
|