/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup RTEMSScoreSemaphore
 *
 * @brief This header file provides interfaces of the
 *   @ref RTEMSScoreSemaphore which are used by the implementation and the
 *   @ref RTEMSImplApplConfig.
 */

/*
 *  COPYRIGHT (c) 1989-2008.
 *  On-Line Applications Research Corporation (OAR).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 */

#ifndef _RTEMS_SCORE_CORESEM_H
#define _RTEMS_SCORE_CORESEM_H

#include <rtems/score/threadq.h>

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @defgroup RTEMSScoreSemaphore Semaphore Handler
 *
 * @ingroup RTEMSScore
 *
 * @brief This group contains the Semaphore Handler implementation.
 *
 * This handler encapsulates functionality which provides the foundation
 * Semaphore services used in all of the APIs supported by RTEMS.
 */
/** @{ */

/**
 *  The following defines the control block used to manage each
 *  counting semaphore.
 */
typedef struct {
  /** This field is the Waiting Queue used to manage the set of tasks
   *  which are blocked waiting to obtain the semaphore.
   */
  Thread_queue_Control        Wait_queue;

  /** This element contains the current count of this semaphore. */
  uint32_t                    count;
}   CORE_semaphore_Control;

/** @} */

#ifdef __cplusplus
}
#endif

#endif
/*  end of include file */