smpbarrier.h

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/*
 * Copyright (c) 2013-2014 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_SMPBARRIER_H
#define _RTEMS_SCORE_SMPBARRIER_H

#include <rtems/score/cpuopts.h>
#include <rtems/score/atomic.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

typedef struct {
  Atomic_Uint value;
  Atomic_Uint sense;
} SMP_barrier_Control;

typedef struct {
  unsigned int sense;
} SMP_barrier_State;

#define SMP_BARRIER_CONTROL_INITIALIZER \
  { ATOMIC_INITIALIZER_UINT( 0U ), ATOMIC_INITIALIZER_UINT( 0U ) }

#define SMP_BARRIER_STATE_INITIALIZER { 0U }

static inline void _SMP_barrier_Control_initialize(
  SMP_barrier_Control *control
)
{
  _Atomic_Init_uint( &control->value, 0U );
  _Atomic_Init_uint( &control->sense, 0U );
}

static inline void _SMP_barrier_State_initialize(
  SMP_barrier_State *state
)
{
  state->sense = 0U;
}

bool _SMP_barrier_Wait(
  SMP_barrier_Control *control,
  SMP_barrier_State *state,
  unsigned int count
);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* _RTEMS_SCORE_SMPBARRIER_H */