103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "dllcom.h"
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CProcessEntry *CProcess::m_pProcessList = NULL;
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CProcessEntry::CProcessEntry(CComDll *pDll)
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{
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DLL_ASSERT(pDll);
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m_dwProcessID = CProcess::GetProcessID();
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m_pDllInstance = pDll;
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m_pNext = CProcess::m_pProcessList;
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CProcess::m_pProcessList = this;
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}
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CProcessEntry::~CProcessEntry()
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{
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// find ourselves in the list and remove us.
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CProcessEntry **ppChange = &CProcess::m_pProcessList;
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while(*ppChange != this) {
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ppChange = &((*ppChange)->m_pNext);
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}
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*ppChange = m_pNext;
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m_dwProcessID = 0;
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m_pDllInstance = NULL;
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m_pNext = NULL;
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}
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DWORD CProcess::GetProcessID()
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{
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DWORD dwRetval = 0;
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// This is only needed to multiplex instance data on win16.
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#ifdef DLL_WIN16
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dwRetval = CoGetCurrentProcess();
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#else
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// Just use the HINSTANCE unless we need to do this on a per
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// thread bases (then as above like WIN16).
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dwRetval = (DWORD)CComDll::GetInstanceHandle();
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#endif
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return(dwRetval);
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}
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CComDll *CProcess::GetProcessDll()
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{
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CComDll *pRetval = NULL;
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// Before we can find the Dll instance data, we need to
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// get the ID of the current process calling us.
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DWORD dwCurrent = GetProcessID();
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// See if the object already exists.
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CProcessEntry *pTraverse = m_pProcessList;
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while(pTraverse && pTraverse->m_dwProcessID != dwCurrent) {
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pTraverse = pTraverse->m_pNext;
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}
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if(pTraverse) {
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// Have it already.
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// Return it.
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pRetval = pTraverse->m_pDllInstance;
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// We must be sure to properly reference count the returned
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// object.
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pRetval->AddRef();
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}
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else {
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// Do not have it.
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// Ask the end consumer to create it.
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pRetval = DLL_ConsumerCreateInstance();
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}
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return(pRetval);
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}
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BOOL CProcess::CanUnloadNow()
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{
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// We can unload if we have no more process entries;
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// all objects are freed off.
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return(m_pProcessList == NULL);
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} |