1 files changed, 0 insertions, 176 deletions
diff --git a/cpukit/score/include/rtems/score/smplockseq.h b/cpukit/score/include/rtems/score/smplockseq.h
deleted file mode 100644
index 5daaee9c6e..0000000000
--- a/cpukit/score/include/rtems/score/smplockseq.h
+++ /dev/null
@@ -1,176 +0,0 @@
-/**
- * @file
- *
- * @ingroup ScoreSMPLock
- *
- * @brief SMP Lock API
- */
-
-/*
- * Copyright (c) 2016 embedded brains GmbH
- *
- * 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_SMPLOCKSEQ_H
-#define _RTEMS_SCORE_SMPLOCKSEQ_H
-
-#include <rtems/score/cpuopts.h>
-
-#if defined(RTEMS_SMP)
-
-#include <rtems/score/assert.h>
-#include <rtems/score/atomic.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-/**
- * @addtogroup ScoreSMPLock
- *
- * @{
- */
-
-/**
- * @brief SMP sequence lock control.
- *
- * The sequence lock offers a consistent data set for readers in the presence
- * of at most one concurrent writer.  Due to the read-modify-write operation in
- * _SMP_sequence_lock_Read_retry() the data corresponding to the last written
- * sequence number is observed.  To allow multiple writers an additional SMP
- * lock is necessary to serialize writes.
- *
- * See also Hans-J. Boehm, HP Laboratories,
- * "Can Seqlocks Get Along With Programming Language Memory Models?",
- * http://www.hpl.hp.com/techreports/2012/HPL-2012-68.pdf
- */
-typedef struct {
-  /**
-   * @brief The sequence number.
-   *
-   * An odd value indicates that a write is in progress.
-   */
-  Atomic_Uint sequence;
-} SMP_sequence_lock_Control;
-
-/**
- * @brief SMP sequence lock control initializer for static initialization.
- */
-#define SMP_SEQUENCE_LOCK_INITIALIZER { ATOMIC_INITIALIZER_UINT( 0 ) }
-
-/**
- * @brief Initializes an SMP sequence lock.
- *
- * Concurrent initialization leads to unpredictable results.
- *
- * @param lock The SMP sequence lock control.
- */
-static inline void _SMP_sequence_lock_Initialize( SMP_sequence_lock_Control *lock )
-{
-  _Atomic_Init_uint( &lock->sequence, 0 );
-}
-
-/**
- * @brief Destroys an SMP sequence lock.
- *
- * Concurrent destruction leads to unpredictable results.
- *
- * @param lock The SMP sequence lock control.
- */
-static inline void _SMP_sequence_lock_Destroy( SMP_sequence_lock_Control *lock )
-{
-  (void) lock;
-}
-
-/**
- * @brief Begins an SMP sequence lock write operation.
- *
- * This function will not disable interrupts.  The caller must ensure that the
- * current thread of execution is not interrupted indefinite since this would
- * starve readers.
- *
- * @param lock The SMP sequence lock control.
- *
- * @return The current sequence number.
- */
-static inline unsigned int _SMP_sequence_lock_Write_begin(
-  SMP_sequence_lock_Control *lock
-)
-{
-  unsigned int seq;
-
-  seq = _Atomic_Load_uint( &lock->sequence, ATOMIC_ORDER_RELAXED );
-  _Assert( seq % 2 == 0 );
-
-  _Atomic_Store_uint( &lock->sequence, seq + 1, ATOMIC_ORDER_RELAXED );
-
-  /* There is no atomic store with acquire/release semantics */
-  _Atomic_Fence( ATOMIC_ORDER_ACQ_REL );
-
-  return seq;
-}
-
-/**
- * @brief Ends an SMP sequence lock write operation.
- *
- * @param lock The SMP sequence lock control.
- * @param seq The sequence number returned by _SMP_sequence_lock_Write_begin().
- */
-static inline void _SMP_sequence_lock_Write_end(
-  SMP_sequence_lock_Control *lock,
-  unsigned int               seq
-)
-{
-  _Atomic_Store_uint( &lock->sequence, seq + 2, ATOMIC_ORDER_RELEASE );
-}
-
-/**
- * @brief Begins an SMP sequence lock read operation.
- *
- * This function will not disable interrupts.
- *
- * @param lock The SMP sequence lock control.
- *
- * @return The current sequence number.
- */
-static inline unsigned int _SMP_sequence_lock_Read_begin(
-  const SMP_sequence_lock_Control *lock
-)
-{
-  return _Atomic_Load_uint( &lock->sequence, ATOMIC_ORDER_ACQUIRE );
-}
-
-/**
- * @brief Ends an SMP sequence lock read operation and indicates if a retry is
- * necessary.
- *
- * @param lock The SMP sequence lock control.
- * @param seq The sequence number returned by _SMP_sequence_lock_Read_begin().
- *
- * @retval true The read operation must be retried with a call to
- *   _SMP_sequence_lock_Read_begin().
- * @retval false Otherwise.
- */
-static inline bool _SMP_sequence_lock_Read_retry(
-  SMP_sequence_lock_Control *lock,
-  unsigned int               seq
-)
-{
-  unsigned int seq2;
-
-  seq2 = _Atomic_Fetch_add_uint( &lock->sequence, 0, ATOMIC_ORDER_RELEASE );
-  return seq != seq2 || seq % 2 != 0;
-}
-
-/**@}*/
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-#endif /* RTEMS_SMP */
-
-#endif /* _RTEMS_SCORE_SMPLOCKSEQ_H */