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- /*
- * Copyright 2005 - 2016 Zarafa and its licensors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- */
- #include <kopano/platform.h>
- #include <kopano/lockhelper.hpp>
- #include <mapidefs.h>
- #include <mapicode.h>
- #include <mapiguid.h>
- #include <kopano/ECUnknown.h>
- #include <kopano/ECGuid.h>
- #include <kopano/ECInterfaceDefs.h>
- namespace KC {
- ECUnknown::ECUnknown(const char *szClassName)
- {
- this->szClassName = szClassName;
- }
- ECUnknown::~ECUnknown()
- {
- if (this->lpParent != nullptr)
- assert(false); // apparently, we're being destructed with delete() while
- // a parent was set up, so we should be deleted via Suicide() !
- }
- ULONG ECUnknown::AddRef() {
- scoped_lock lock(mutex);
- return ++this->m_cRef;
- }
- ULONG ECUnknown::Release() {
- bool bLastRef = false;
-
- ulock_normal locker(mutex);
- ULONG nRef = --this->m_cRef;
- if((int)m_cRef == -1)
- assert(false);
-
- bLastRef = this->lstChildren.empty() && this->m_cRef == 0;
- locker.unlock();
- if(bLastRef)
- this->Suicide();
- // The object may be deleted now
- return nRef;
- }
- HRESULT ECUnknown::QueryInterface(REFIID refiid, void **lppInterface) {
- REGISTER_INTERFACE2(ECUnknown, this);
- REGISTER_INTERFACE2(IUnknown, &this->m_xUnknown);
- return MAPI_E_INTERFACE_NOT_SUPPORTED;
- }
- HRESULT ECUnknown::AddChild(ECUnknown *lpChild) {
-
- scoped_lock locker(mutex);
- if(lpChild) {
- this->lstChildren.push_back(lpChild);
- lpChild->SetParent(this);
- }
- return hrSuccess;
- }
- HRESULT ECUnknown::RemoveChild(ECUnknown *lpChild) {
- std::list<ECUnknown *>::iterator iterChild;
- bool bLastRef;
- ulock_normal locker(mutex);
- if (lpChild != NULL)
- for (iterChild = lstChildren.begin(); iterChild != lstChildren.end(); ++iterChild)
- if(*iterChild == lpChild)
- break;
- if (iterChild == lstChildren.end())
- return MAPI_E_NOT_FOUND;
- lstChildren.erase(iterChild);
- bLastRef = this->lstChildren.empty() && this->m_cRef == 0;
- locker.unlock();
- if(bLastRef)
- this->Suicide();
- // The object may be deleted now
- return hrSuccess;
- }
- HRESULT ECUnknown::SetParent(ECUnknown *lpParent) {
- // Parent object may only be set once
- assert(this->lpParent == NULL);
- this->lpParent = lpParent;
- return hrSuccess;
- }
- /**
- * Returns whether this object is the parent of passed object
- *
- * @param lpObject Possible child object
- *
- * @return this is a parent of lpObject, or not
- */
- BOOL ECUnknown::IsParentOf(const ECUnknown *lpObject) {
- while (lpObject && lpObject->lpParent) {
- if (lpObject->lpParent == this)
- return TRUE;
- lpObject = lpObject->lpParent;
- }
- return FALSE;
- }
- /**
- * Returns whether this object is a child of passed object
- *
- * @param lpObject IUnknown object which may be a child of this
- *
- * @return lpObject is a parent of this, or not
- */
- BOOL ECUnknown::IsChildOf(const ECUnknown *lpObject) {
- if (lpObject) {
- for (auto p : lpObject->lstChildren) {
- if (this == p)
- return TRUE;
- if (this->IsChildOf(p))
- return TRUE;
- }
- }
- return FALSE;
- }
- // We kill the local object if there are no external (AddRef()) and no internal
- // (AddChild) objects depending on us.
- HRESULT ECUnknown::Suicide() {
- ECUnknown *lpParent = this->lpParent;
- auto self = this;
- // First, destroy the current object
- this->lpParent = NULL;
- delete this;
- // WARNING: The child list of our parent now contains a pointer to this
- // DELETED object. We must make sure that nobody ever follows pointer references
- // in this list during this interval. The list is, therefore PRIVATE to this object,
- // and may only be access through functions in ECUnknown.
- // Now, tell our parent to delete this object
- if (lpParent != nullptr)
- lpParent->RemoveChild(self);
- return hrSuccess;
- }
- DEF_HRMETHOD0(ECUnknown, Unknown, QueryInterface, (REFIID, refiid), (void **, lppInterface))
- DEF_ULONGMETHOD0(ECUnknown, Unknown, AddRef, (void))
- DEF_ULONGMETHOD0(ECUnknown, Unknown, Release, (void))
- } /* namespace */
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