source: rtems/cpukit/rtems/src/clocktick.c @ 66cb142

Last change on this file since 66cb142 was 2e71aa41, checked in by Sebastian Huber <sebastian.huber@…>, on Feb 17, 2016 at 11:52:17 AM

score: Simplify _Watchdog_Tick()

Move thread dispatch disable check to legacy rtems_clock_tick(). Assert
that thread dispatching is disabled in _Watchdog_Tick(). This is
usually the case, since this function is called in interrupt context by
the clock tick service routine.

  • Property mode set to 100644
File size: 815 bytes
Line 
1/**
2 *  @file
3 *
4 *  @brief Announce a Clock Tick
5 *  @ingroup ClassicClock
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2009.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/rtems/clock.h>
22#include <rtems/score/timecounter.h>
23#include <rtems/score/threadimpl.h>
24
25rtems_status_code rtems_clock_tick( void )
26{
27  ISR_lock_Context lock_context;
28
29  _Timecounter_Acquire( &lock_context );
30  _Timecounter_Tick_simple(
31    rtems_configuration_get_microseconds_per_tick(),
32    0,
33    &lock_context
34  );
35
36  if ( _Thread_Dispatch_is_enabled() ) {
37    _Thread_Dispatch();
38  }
39
40  return RTEMS_SUCCESSFUL;
41}
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