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https://gitlab.rtems.org/rtems/rtos/rtems.git
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Glenn Humphrey
6cc1c294d6
* support/include/test_support.h, support/include/tmacros.h, support/src/test_support.c: Added support functions to spin for a number of ticks and to spin until the next tick. * support/src/spin.c: New file.
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
/*
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* COPYRIGHT (c) 1989-2009.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#include <rtems.h>
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/*
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* Burn CPU for specified number of ticks
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*/
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void rtems_test_spin_for_ticks(int ticks)
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{
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rtems_interval start;
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rtems_interval now;
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start = rtems_clock_get_ticks_since_boot();
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do {
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now = rtems_clock_get_ticks_since_boot();
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/*
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* Spin for <= ticks so we spin >= number of ticks.
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* The first tick we spin through is a partial one.
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* So you sping "ticks" number of ticks plus a partial
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* one.
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*/
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} while ( (now-start) <= ticks );
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}
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/*
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* Spin until the next clock tick
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*/
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void rtems_test_spin_until_next_tick( void )
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{
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rtems_interval start;
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rtems_interval now;
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start = rtems_clock_get_ticks_since_boot();
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do {
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now = rtems_clock_get_ticks_since_boot();
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} while ( now != start );
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}
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