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/**
* @file rtems/score/corespinlock.h
*
* @brief Constants and Structures Associated with the Spinlock Handler
*
* This include file contains all the constants and structures associated
* with the Spinlock Handler.
*/
/*
* COPYRIGHT (c) 1989-2006.
* On-Line Applications Research Corporation (OAR).
*
* 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_CORESPINLOCK_H
#define _RTEMS_SCORE_CORESPINLOCK_H
#include <rtems/score/object.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup ScoreSpinlock Spinlock Handler
*
* @ingroup Score
*
* This handler encapsulates functionality which provides the foundation
* Spinlock services used in all of the APIs supported by RTEMS.
*/
/**@{*/
/**
* The following defines the control block used to manage the
* attributes of each spinlock.
*/
typedef struct {
/** This element indicates XXX
*/
uint32_t XXX;
} CORE_spinlock_Attributes;
/**
* The following defines the control block used to manage each
* spinlock.
*/
typedef struct {
/** XXX may not be needed */
CORE_spinlock_Attributes Attributes;
/** This field is the lock.
*/
volatile uint32_t lock;
/** This field is a count of the current number of threads using
* this spinlock. It includes the thread holding the lock as well
* as those waiting.
*/
volatile uint32_t users;
/** This field is the Id of the thread holding the lock. It may or may
* not be the thread which acquired it.
*/
volatile Objects_Id holder;
} CORE_spinlock_Control;
/**@}*/
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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