qa_usub.cpp

00001 //////////////////////////////////////////////////////////////////////////////
00002 // Product: QF/C++
00003 // Last Updated for Version: 4.0.00
00004 // Date of the Last Update:  Apr 07, 2008
00005 //
00006 //                    Q u a n t u m     L e a P s
00007 //                    ---------------------------
00008 //                    innovating embedded systems
00009 //
00010 // Copyright (C) 2002-2008 Quantum Leaps, LLC. All rights reserved.
00011 //
00012 // This software may be distributed and modified under the terms of the GNU
00013 // General Public License version 2 (GPL) as published by the Free Software
00014 // Foundation and appearing in the file GPL.TXT included in the packaging of
00015 // this file. Please note that GPL Section 2[b] requires that all works based
00016 // on this software must also be made publicly available under the terms of
00017 // the GPL ("Copyleft").
00018 //
00019 // Alternatively, this software may be distributed and modified under the
00020 // terms of Quantum Leaps commercial licenses, which expressly supersede
00021 // the GPL and are specifically designed for licensees interested in
00022 // retaining the proprietary status of their code.
00023 //
00024 // Contact information:
00025 // Quantum Leaps Web site:  http://www.quantum-leaps.com
00026 // e-mail:                  info@quantum-leaps.com
00027 //////////////////////////////////////////////////////////////////////////////
00028 #include "qf_pkg.h"
00029 #include "qassert.h"
00030 
00031 Q_DEFINE_THIS_MODULE(qa_usub)
00032 
00033 /// \file
00034 /// \ingroup qf
00035 /// \brief QActive::unsubscribe() implementation.
00036 
00037 //............................................................................
00038 void QActive::unsubscribe(QSignal sig) const {
00039     uint8_t p = m_prio;
00040     Q_REQUIRE(((QSignal)Q_USER_SIG <= sig)
00041               && (sig < QF_maxSignal_)
00042               && ((uint8_t)0 < p) && (p <= (uint8_t)QF_MAX_ACTIVE)
00043               && (QF::active_[p] == this));
00044 
00045     uint8_t i = Q_ROM_BYTE(QF_div8Lkup[p]);
00046 
00047     QF_INT_LOCK_KEY_
00048     QF_INT_LOCK_();
00049 
00050     QS_BEGIN_NOLOCK_(QS_QF_ACTIVE_UNSUBSCRIBE, QS::aoObj_, this)
00051         QS_TIME_();                                               // timestamp
00052         QS_SIG_(sig);                              // the signal of this event
00053         QS_OBJ_(this);                                   // this active object
00054     QS_END_NOLOCK_()
00055                                                      // clear the priority bit
00056     QF_subscrList_[sig].m_bits[i] &= Q_ROM_BYTE(QF_invPwr2Lkup[p]);
00057     QF_INT_UNLOCK_();
00058 }