114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these librararies and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: DescriptorManager.C /main/1 1996/07/29 16:48:58 cde-hp $ */
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// Copyright (c) 1994 James Clark
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// See the file COPYING for copying permission.
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#include "splib.h"
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#include "DescriptorManager.h"
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#include "ListIter.h"
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#ifdef SP_NAMESPACE
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namespace SP_NAMESPACE {
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#endif
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DescriptorUser::DescriptorUser(DescriptorManager *manager)
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: manager_(manager)
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{
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if (manager_)
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manager_->addUser(this);
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}
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DescriptorUser::~DescriptorUser()
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{
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if (manager_)
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manager_->removeUser(this);
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}
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void DescriptorUser::managerDeleted()
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{
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manager_ = 0;
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}
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Boolean DescriptorUser::suspend()
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{
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return 0;
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}
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void DescriptorUser::acquireD()
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{
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if (manager_)
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manager_->acquireD();
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}
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void DescriptorUser::releaseD()
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{
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if (manager_)
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manager_->releaseD();
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}
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DescriptorManager::DescriptorManager(int maxD)
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: maxD_(maxD), usedD_(0)
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{
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}
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DescriptorManager::~DescriptorManager()
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{
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for (ListIter<DescriptorUser *> iter(users_);
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!iter.done();
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iter.next())
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iter.cur()->managerDeleted();
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}
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void DescriptorManager::addUser(DescriptorUser *p)
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{
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users_.insert(p);
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}
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void DescriptorManager::removeUser(DescriptorUser *p)
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{
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users_.remove(p);
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}
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void DescriptorManager::acquireD()
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{
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if (usedD_ >= maxD_) {
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for (ListIter<DescriptorUser *> iter(users_);
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!iter.done();
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iter.next()) {
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if (iter.cur()->suspend())
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break;
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}
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}
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usedD_++;
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}
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void DescriptorManager::releaseD()
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{
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usedD_--;
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}
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#ifdef SP_NAMESPACE
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}
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#endif
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