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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [kernel/] [current/] [src/] [common/] [timer.cxx] - Rev 851
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//========================================================================== // // common/timer.cxx // // Timer class implementations // //========================================================================== // ####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later // version. // // eCos is distributed in the hope that it will be useful, but WITHOUT // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License // along with eCos; if not, write to the Free Software Foundation, Inc., // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. // // As a special exception, if other files instantiate templates or use // macros or inline functions from this file, or you compile this file // and link it with other works to produce a work based on this file, // this file does not by itself cause the resulting work to be covered by // the GNU General Public License. However the source code for this file // must still be made available in accordance with section (3) of the GNU // General Public License v2. // // This exception does not invalidate any other reasons why a work based // on this file might be covered by the GNU General Public License. // ------------------------------------------- // ####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): dsm // Contributors: dsm // Date: 1998-06-11 // Purpose: Clock class implementation // Description: This file implements the Timer class which is derived from // the Alarm class to support uITRON type functionality // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/kernel.h> #include <cyg/kernel/ktypes.h> // base kernel types #include <cyg/infra/cyg_trac.h> // tracing macros #include <cyg/infra/cyg_ass.h> // assertion macros #include <cyg/kernel/clock.hxx> #include <cyg/kernel/timer.hxx> #include <cyg/kernel/clock.inl> // Clock inlines // ------------------------------------------------------------------------- Cyg_Timer::Cyg_Timer() { } Cyg_Timer::~Cyg_Timer() { CYG_REPORT_FUNCTION(); disable(); counter = NULL; } // ------------------------------------------------------------------------- void Cyg_Timer::initialize( Cyg_Counter *c, cyg_alarm_fn a, CYG_ADDRWORD d, cyg_tick_count t, // absolute time cyg_tick_count i, // 0 => one shot, else repeating cyg_uint32 action // (DISABLE | ENABLE) ) { CYG_REPORT_FUNCTION(); counter = c; alarm = a; data = d; trigger = t; interval = i; enabled = false; CYG_ASSERT(0 == (action & ~ENABLE), "unknown action"); if(action & ENABLE) enable(); } void Cyg_Timer::activate(cyg_uint32 action) // (DISABLE | ENABLE) [|RESET] { // we must also disable the alarm when resetting it so as to remove it // from its queue, so that the enable afterwards places it on the right // queue instead of assuming that, being enabled, it's already there. // (if not enabling, the behaviour is unchanged and correct) if(!(action & ENABLE) || (action & RESET) ) disable(); // otherwise, the enable below does nothing... if((action & RESET)) { cyg_tick_count t; t = counter->current_value(); trigger = t + interval; } if((action & ENABLE)) { enable(); // ...when it should put the timer on a new queue. } } // ------------------------------------------------------------------------- // EOF common/timer.cxx
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