00001 00002 // Product: QK/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 00028 #include "qk_pkg.h" 00029 00030 //Q_DEFINE_THIS_MODULE(qk_mutex) 00031 00035 00036 //............................................................................ 00037 QMutex QK::mutexLock(uint8_t prioCeiling) { 00038 QK_INT_LOCK_KEY_ 00039 QK_INT_LOCK_(); 00040 uint8_t mutex = QK_currPrio_; // the original QK priority to return 00041 if (QK_currPrio_ < prioCeiling) { 00042 QK_currPrio_ = prioCeiling; // raise the QK priority 00043 } 00044 00045 QS_BEGIN_NOLOCK_(QS_QK_MUTEX_LOCK, (void *)0, (void *)0) 00046 QS_TIME_(); // timestamp 00047 QS_U8_(mutex); // the original priority 00048 QS_U8_(QK_currPrio_); // the current priority 00049 QS_END_NOLOCK_() 00050 00051 QK_INT_UNLOCK_(); 00052 return mutex; 00053 } 00054 //............................................................................ 00055 void QK::mutexUnlock(QMutex mutex) { 00056 QK_INT_LOCK_KEY_ 00057 QK_INT_LOCK_(); 00058 00059 QS_BEGIN_NOLOCK_(QS_QK_MUTEX_UNLOCK, (void *)0, (void *)0) 00060 QS_TIME_(); // timestamp 00061 QS_U8_(mutex); // the original priority 00062 QS_U8_(QK_currPrio_); // the current priority 00063 QS_END_NOLOCK_() 00064 00065 if (QK_currPrio_ > mutex) { 00066 QK_currPrio_ = mutex; // restore the saved priority 00067 QK_SCHEDULE_(); 00068 } 00069 QK_INT_UNLOCK_(); 00070 }
1.5.4