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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [clockget.c] - Rev 593
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/* * Clock Manager * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: clockget.c,v 1.2 2001-09-27 11:59:19 chris Exp $ */ #include <rtems/system.h> #include <rtems/rtems/status.h> #include <rtems/rtems/clock.h> #include <rtems/score/isr.h> #include <rtems/score/thread.h> #include <rtems/score/tod.h> #include <rtems/score/watchdog.h> /*PAGE * * rtems_clock_get * * This directive returns the current date and time. If the time has * not been set by a tm_set then an error is returned. * * Input parameters: * option - which value to return * time_buffer - pointer to output buffer (a time and date structure * or an interval) * * Output parameters: * time_buffer - output filled in * RTEMS_SUCCESSFUL - if successful * error code - if unsuccessful */ rtems_status_code rtems_clock_get( rtems_clock_get_options option, void *time_buffer ) { ISR_Level level; rtems_interval tmp; switch ( option ) { case RTEMS_CLOCK_GET_TOD: if ( !_TOD_Is_set ) return RTEMS_NOT_DEFINED; *(rtems_time_of_day *)time_buffer = _TOD_Current; return RTEMS_SUCCESSFUL; case RTEMS_CLOCK_GET_SECONDS_SINCE_EPOCH: if ( !_TOD_Is_set ) return RTEMS_NOT_DEFINED; *(rtems_interval *)time_buffer = _TOD_Seconds_since_epoch; return RTEMS_SUCCESSFUL; case RTEMS_CLOCK_GET_TICKS_SINCE_BOOT: *(rtems_interval *)time_buffer = _Watchdog_Ticks_since_boot; return RTEMS_SUCCESSFUL; case RTEMS_CLOCK_GET_TICKS_PER_SECOND: *(rtems_interval *)time_buffer = _TOD_Ticks_per_second; return RTEMS_SUCCESSFUL; case RTEMS_CLOCK_GET_TIME_VALUE: if ( !_TOD_Is_set ) return RTEMS_NOT_DEFINED; _ISR_Disable( level ); ((rtems_clock_time_value *)time_buffer)->seconds = _TOD_Seconds_since_epoch; tmp = _TOD_Current.ticks; _ISR_Enable( level ); tmp *= _TOD_Microseconds_per_tick; ((rtems_clock_time_value *)time_buffer)->microseconds = tmp; return RTEMS_SUCCESSFUL; } return RTEMS_INTERNAL_ERROR; /* should never get here */ }
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