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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [sem.c] - Rev 1765
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/* * 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 }