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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [io/] [wallclock/] [current/] [src/] [emulate.cxx] - Rev 810
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//========================================================================== // // io/wallclock/emulate.cxx // // Wallclock emulation implementation // //========================================================================== // ####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): nickg // Contributors: nickg // Date: 1999-03-05 // Purpose: Wallclock emulation // //####DESCRIPTIONEND#### // //========================================================================== #include <pkgconf/wallclock.h> // Wallclock device config #include <pkgconf/kernel.h> // Kernel config #include <cyg/infra/cyg_type.h> // Common type definitions and support #include <cyg/kernel/ktypes.h> #include <cyg/io/wallclock.hxx> // The WallClock API #include <cyg/kernel/clock.hxx> // Access to kernel clock #include <cyg/kernel/clock.inl> // Remember the tick count at the time of initialization. static cyg_tick_count epoch_ticks; //----------------------------------------------------------------------------- // Called to initialize the hardware clock with a known valid // time. Which of course isn't required when doing emulation using the // kernel clock. But we set the private epoch base to "now". void Cyg_WallClock::init_hw_seconds( void ) { // Remember the current clock tick count. epoch_ticks = Cyg_Clock::real_time_clock->current_value(); } //----------------------------------------------------------------------------- // Returns the number of seconds elapsed since the init call. cyg_uint32 Cyg_WallClock::get_hw_seconds( void ) { Cyg_Clock::cyg_resolution res = Cyg_Clock::real_time_clock->get_resolution(); cyg_tick_count secs = Cyg_Clock::real_time_clock->current_value() - epoch_ticks; secs = secs / ( ( res.divisor * 1000000000LL ) / res.dividend ); return secs; } //----------------------------------------------------------------------------- // End of devs/wallclock/emulate.cxx
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