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/*  macros/coresem.h

 *

 *  This include file contains all of the inlined routines associated

 *  with core semaphores.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  coresem.inl,v 1.8 2001/05/25 16:59:28 joel Exp

 */

#ifndef __MACROS_CORE_SEMAPHORE_h

#define __MACROS_CORE_SEMAPHORE_h

/*PAGE

 *

 *  _CORE_semaphore_Is_priority

 *

 */

#define _CORE_semaphore_Is_priority( _the_attribute ) \

  ( (_the_attribute)->discipline == CORE_SEMAPHORE_DISCIPLINES_PRIORITY )

/*PAGE

 *

 *  _CORE_semaphore_Get_count

 *

 */

#define _CORE_semaphore_Get_count( _the_semaphore ) \

  ( (_the_semaphore)->count )

/*PAGE

 *

 *  _CORE_semaphore_Seize_isr_disable

 */

#define _CORE_semaphore_Seize_isr_disable( \

  _the_semaphore, _id, _wait, _timeout, _level_p) \

{ \

  Thread_Control *executing; \

  ISR_Level       level = *(_level_p); \

 \

  /* disabled when you get here */ \

 \

  executing = _Thread_Executing; \

  executing->Wait.return_code = CORE_SEMAPHORE_STATUS_SUCCESSFUL; \

  if ( (_the_semaphore)->count != 0 ) { \

    (_the_semaphore)->count -= 1; \

    _ISR_Enable( level ); \

  } else if ( !(_wait) ) { \

    _ISR_Enable( level ); \

    executing->Wait.return_code = CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT; \

  } else { \

    _Thread_Disable_dispatch(); \

    _Thread_queue_Enter_critical_section( &(_the_semaphore)->Wait_queue ); \

    executing->Wait.queue          = &(_the_semaphore)->Wait_queue; \

    executing->Wait.id             = (_id); \

    _ISR_Enable( level ); \

 \

    _Thread_queue_Enqueue( &(_the_semaphore)->Wait_queue, (_timeout) ); \

    _Thread_Enable_dispatch(); \

  } \

}

#endif

/* end of include file */