Subversion Repositories openrisc_2011-10-31

/*

 *  Semaphore Manager

 *

 *  DESCRIPTION:

 *

 *  This package is the implementation of the Semaphore Manager.

 *  This manager utilizes standard Dijkstra counting semaphores to provide

 *  synchronization and mutual exclusion capabilities.

 *

 *  Directives provided are:

 *

 *     + create a semaphore

 *     + get an ID of a semaphore

 *     + delete a semaphore

 *     + acquire a semaphore

 *     + release a semaphore

 *

 *  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.

 *

 *  $Id: sem.c,v 1.2 2001-09-27 11:59:19 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/support.h>

#include <rtems/rtems/attr.h>

#include <rtems/score/isr.h>

#include <rtems/score/object.h>

#include <rtems/rtems/options.h>

#include <rtems/rtems/sem.h>

#include <rtems/score/coremutex.h>

#include <rtems/score/coresem.h>

#include <rtems/score/states.h>

#include <rtems/score/thread.h>

#include <rtems/score/threadq.h>

#if defined(RTEMS_MULTIPROCESSING)

#include <rtems/score/mpci.h>

#endif

#include <rtems/score/sysstate.h>

#include <rtems/score/interr.h>

/*PAGE

 *

 *  _Semaphore_Manager_initialization

 *

 *  This routine initializes all semaphore manager related data structures.

 *

 *  Input parameters:

 *    maximum_semaphores - maximum configured semaphores

 *

 *  Output parameters:  NONE

 */

void _Semaphore_Manager_initialization(

  unsigned32 maximum_semaphores

)

{

  _Objects_Initialize_information(

    &_Semaphore_Information,

    OBJECTS_RTEMS_SEMAPHORES,

    TRUE,

    maximum_semaphores,

    sizeof( Semaphore_Control ),

    FALSE,

    RTEMS_MAXIMUM_NAME_LENGTH,

    FALSE

  );

  /*

   *  Register the MP Process Packet routine.

   */

#if defined(RTEMS_MULTIPROCESSING)

  _MPCI_Register_packet_processor(

    MP_PACKET_SEMAPHORE,

    _Semaphore_MP_Process_packet

  );

#endif

}