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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [coresem.c] - Blame information for rev 449

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/*
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 *  CORE Semaphore Handler
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 *
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 *  DESCRIPTION:
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 *
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 *  This package is the implementation of the CORE Semaphore Handler.
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 *  This core object utilizes standard Dijkstra counting semaphores to provide
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 *  synchronization and mutual exclusion capabilities.
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: coresem.c,v 1.2 2001-09-27 11:59:34 chris Exp $
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 */
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#include <rtems/system.h>
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#include <rtems/score/isr.h>
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#include <rtems/score/coresem.h>
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#include <rtems/score/states.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/threadq.h>
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#if defined(RTEMS_MULTIPROCESSING)
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#include <rtems/score/mpci.h>
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#endif
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/*PAGE
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 *
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 *  CORE_semaphore_Initialize
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 *
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 *  This function initialize a semaphore and sets the initial value based
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 *  on the given count.
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 *
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 *  Input parameters:
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 *    the_semaphore            - the semaphore control block to initialize
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 *    the_class                - the API class of the object
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 *    the_semaphore_attributes - the attributes specified at create time
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 *    initial_value            - semaphore's initial value
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 *    proxy_extract_callout    - MP specific extract callout
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 *
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 *  Output parameters:  NONE
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 */
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void _CORE_semaphore_Initialize(
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  CORE_semaphore_Control       *the_semaphore,
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  Objects_Classes               the_class,
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  CORE_semaphore_Attributes    *the_semaphore_attributes,
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  unsigned32                    initial_value,
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  Thread_queue_Extract_callout  proxy_extract_callout
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)
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{
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  the_semaphore->Attributes = *the_semaphore_attributes;
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  the_semaphore->count      = initial_value;
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  _Thread_queue_Initialize(
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    &the_semaphore->Wait_queue,
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    the_class,
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    _CORE_semaphore_Is_priority( the_semaphore_attributes ) ?
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              THREAD_QUEUE_DISCIPLINE_PRIORITY : THREAD_QUEUE_DISCIPLINE_FIFO,
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    STATES_WAITING_FOR_SEMAPHORE,
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    proxy_extract_callout,
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    CORE_SEMAPHORE_TIMEOUT
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  );
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}

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