qte_rarm.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(qte_rarm)
00032 
00033 /// \file
00034 /// \ingroup qf
00035 /// \brief QTimeEvt::rearm() implementation.
00036 
00037 //............................................................................
00038 uint8_t QTimeEvt::rearm(QTimeEvtCtr nTicks) {
00039     Q_REQUIRE((nTicks > (QTimeEvtCtr)0)        /* cannot rearm with 0 ticks */
00040               && (sig >= (QSignal)Q_USER_SIG)               /* valid signal */
00041               && (m_act != (QActive *)0));              // valid active object
00042     uint8_t isArmed;
00043     QF_INT_LOCK_KEY_
00044     QF_INT_LOCK_();
00045     m_ctr = nTicks;
00046     if (m_prev == (QTimeEvt *)0) {             // is this time event disarmed?
00047         isArmed = (uint8_t)0;
00048         m_next = QF_timeEvtListHead_;
00049         if (QF_timeEvtListHead_ != (QTimeEvt *)0) {
00050             QF_timeEvtListHead_->m_prev = this;
00051         }
00052         QF_timeEvtListHead_ = this;
00053         m_prev = this;                             // mark the time evt in use
00054     }
00055     else {                                          // the time event is armed
00056         isArmed = (uint8_t)1;
00057     }
00058 
00059     QS_BEGIN_NOLOCK_(QS_QF_TIMEEVT_REARM, QS::teObj_, this)
00060         QS_TIME_();                                               // timestamp
00061         QS_OBJ_(this);                               // this time event object
00062         QS_OBJ_(m_act);                                   // the active object
00063         QS_TEC_(m_ctr);                                 // the number of ticks
00064         QS_TEC_(m_interval);                                   // the interval
00065         QS_U8_(isArmed);                               // was the timer armed?
00066     QS_END_NOLOCK_()
00067 
00068     QF_INT_UNLOCK_();
00069     return isArmed;
00070 }