isrlock.h

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/*
 * Copyright (c) 2013-2015 embedded brains GmbH.  All rights reserved.
 *
 *  embedded brains GmbH
 *  Dornierstr. 4
 *  82178 Puchheim
 *  Germany
 *  <rtems@embedded-brains.de>
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

#ifndef _RTEMS_SCORE_ISR_LOCK_H
#define _RTEMS_SCORE_ISR_LOCK_H

#include <rtems/score/isrlevel.h>
#include <rtems/score/smplock.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
#if defined( RTEMS_SMP )
  SMP_lock_Control Lock;
#endif
} ISR_lock_Control;

typedef struct {
#if defined( RTEMS_SMP )
  SMP_lock_Context Lock_context;
#else
  ISR_Level isr_level;
#endif
#if defined( RTEMS_PROFILING )

  CPU_Counter_ticks ISR_disable_instant;
#endif
} ISR_lock_Context;

#if defined( RTEMS_SMP )
  #define ISR_LOCK_MEMBER( _designator ) ISR_lock_Control _designator;
#else
  #define ISR_LOCK_MEMBER( _designator )
#endif

#if defined( RTEMS_SMP )
  #define ISR_LOCK_DECLARE( _qualifier, _designator ) \
    _qualifier ISR_lock_Control _designator;
#else
  #define ISR_LOCK_DECLARE( _qualifier, _designator )
#endif

#if defined( RTEMS_SMP )
  #define ISR_LOCK_DEFINE( _qualifier, _designator, _name ) \
    _qualifier ISR_lock_Control _designator = { SMP_LOCK_INITIALIZER( _name ) };
#else
  #define ISR_LOCK_DEFINE( _qualifier, _designator, _name )
#endif

#if defined( RTEMS_SMP )
  #define ISR_LOCK_REFERENCE( _designator, _target ) \
    ISR_lock_Control *_designator = _target;
#else
  #define ISR_LOCK_REFERENCE( _designator, _target )
#endif

#if defined( RTEMS_SMP )
  #define ISR_LOCK_INITIALIZER( _name ) \
    { SMP_LOCK_INITIALIZER( _name ) }
#else
  #define ISR_LOCK_INITIALIZER( _name ) \
    { }
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Initialize( _lock, _name ) \
    _SMP_lock_Initialize( &( _lock )->Lock, _name )
#else
  #define _ISR_lock_Initialize( _lock, _name )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Destroy( _lock ) \
    _SMP_lock_Destroy( &( _lock )->Lock )
#else
  #define _ISR_lock_Destroy( _lock )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_ISR_disable_and_acquire( _lock, _context ) \
    _SMP_lock_ISR_disable_and_acquire( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    )
#else
  #define _ISR_lock_ISR_disable_and_acquire( _lock, _context ) \
    _ISR_Disable( ( _context )->isr_level )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Release_and_ISR_enable( _lock, _context ) \
    _SMP_lock_Release_and_ISR_enable( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    )
#else
  #define _ISR_lock_Release_and_ISR_enable( _lock, _context ) \
    _ISR_Enable( ( _context )->isr_level )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Acquire( _lock, _context ) \
    _SMP_lock_Acquire( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    )
#else
  #define _ISR_lock_Acquire( _lock, _context )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Release( _lock, _context ) \
    _SMP_lock_Release( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    )
#else
  #define _ISR_lock_Release( _lock, _context )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_Flash( _lock, _context ) \
    _SMP_lock_Release_and_ISR_enable( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    ); \
    _SMP_lock_ISR_disable_and_acquire( \
      &( _lock )->Lock, \
      &( _context )->Lock_context \
    )
#else
  #define _ISR_lock_Flash( _lock, _context ) \
    _ISR_Flash( ( _context )->isr_level )
#endif

#if defined( RTEMS_PROFILING )
  #define _ISR_lock_ISR_disable_profile( _context ) \
    ( _context )->ISR_disable_instant = _CPU_Counter_read();
#else
  #define _ISR_lock_ISR_disable_profile( _context )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_ISR_disable( _context ) \
    do { \
      _ISR_Disable_without_giant( ( _context )->Lock_context.isr_level ); \
      _ISR_lock_ISR_disable_profile( _context ) \
    } while ( 0 )
#else
  #define _ISR_lock_ISR_disable( _context ) \
    do { \
      _ISR_Disable( ( _context )->isr_level ); \
      _ISR_lock_ISR_disable_profile( _context ) \
    } while ( 0 )
#endif

#if defined( RTEMS_SMP )
  #define _ISR_lock_ISR_enable( _context ) \
    _ISR_Enable_without_giant( ( _context )->Lock_context.isr_level )
#else
  #define _ISR_lock_ISR_enable( _context ) \
    _ISR_Enable( ( _context )->isr_level )
#endif

#ifdef __cplusplus
}
#endif

#endif /* _RTEMS_SCORE_ISR_LOCK_H */