clock.inl

eCos1.31版

#ifndef CYGONCE_KERNEL_CLOCK_INL
#define CYGONCE_KERNEL_CLOCK_INL

//==========================================================================
//
//      clock.inl
//
//      Clock and Alarm class inlines
//
//==========================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (the "License"); you may not use this file except in         
// compliance with the License.  You may obtain a copy of the License at    
// http://www.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
// License for the specific language governing rights and limitations under 
// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   nickg
// Contributors:        nickg
// Date:        1997-09-30
// Purpose:     Define Clock and Alarm class inlines
// Description: Define inline functions for counter, clock and alarm
//              classes.
// Usage:       #include <cyg/kernel/clock.hxx>
//              #include <cyg/kernel/clock.inl>
//
//####DESCRIPTIONEND####
//
//==========================================================================

#include <cyg/kernel/clock.hxx>

// -------------------------------------------------------------------------
// -------------------------------------------------------------------------
// Counter class inlines

// Return current value of counter
inline cyg_tick_count Cyg_Counter::current_value()
{
    return counter;
}

inline cyg_uint32 Cyg_Counter::current_value_lo()
{
    return counter&0xFFFFFFFF;
}

inline cyg_uint32 Cyg_Counter::current_value_hi()
{
    return (counter>>32)&0xFFFFFFFF;
}

// Set the counter's current value
inline void Cyg_Counter::set_value( cyg_tick_count new_value)
{
    counter = new_value;
}
        
// -------------------------------------------------------------------------
// -------------------------------------------------------------------------
// Clock class inlines

// Return current resolution
inline Cyg_Clock::cyg_resolution Cyg_Clock::get_resolution()
{
    return resolution;
}

// Set new resolution
inline void Cyg_Clock::set_resolution(                
        Cyg_Clock::cyg_resolution new_resolution
        )
{
    resolution = new_resolution;
}

inline cyg_tick_count Cyg_Clock::convert(
    cyg_tick_count value,
    struct converter *pcc )
{
    cyg_uint64 t = (cyg_uint64)value;
    // Do this in an order to prevent overflow at the expense of
    // accuracy:
    t *= pcc->mul1;
    t += pcc->div1 / 2;
    t /= pcc->div1;
    t *= pcc->mul2;
    t += pcc->div2 / 2;
    t /= pcc->div2;
    // The alternative would be to do the 2 multiplies first
    // for smaller arguments.
    return (cyg_tick_count)t;
}

// -------------------------------------------------------------------------
// -------------------------------------------------------------------------
// Alarm inlines

// Ensure alarm disabled
inline void Cyg_Alarm::disable()
{
    if( enabled ) counter->rem_alarm(this);
}


// -------------------------------------------------------------------------
#endif // ifndef CYGONCE_KERNEL_CLOCK_INL
// EOF clock.inl