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58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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device.cpp
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A base class for all devices.
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*******************************************************************************/
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#include <sortix/kernel/platform.h>
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#include <sortix/kernel/kthread.h>
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#include <string.h>
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#include "device.h"
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namespace Sortix
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{
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Device::Device()
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{
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refcountlock = KTHREAD_MUTEX_INITIALIZER;
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refcount = 0;
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}
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Device::~Device()
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{
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}
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void Device::Unref()
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{
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bool shoulddelete = false;
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kthread_mutex_lock(&refcountlock);
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shoulddelete = --refcount == 0 || refcount == SIZE_MAX;
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kthread_mutex_unlock(&refcountlock);
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if ( shoulddelete )
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delete this;
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}
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void Device::Refer()
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{
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ScopedLock lock(&refcountlock);
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refcount++;
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}
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}
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