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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [semflush.c] - Rev 751
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/* * rtems_semaphore_flush * * DESCRIPTION: * * This package is the implementation of the flush directive * of the Semaphore Manager. * * 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: semflush.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 * * rtems_semaphore_flush * * This directive allows a thread to flush the threads * pending on the semaphore. * * Input parameters: * id - semaphore id * * Output parameters: * RTEMS_SUCCESSFUL - if successful * error code - if unsuccessful */ #if defined(RTEMS_MULTIPROCESSING) #define SEND_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted #else #define SEND_OBJECT_WAS_DELETED NULL #endif rtems_status_code rtems_semaphore_flush( Objects_Id id ) { register Semaphore_Control *the_semaphore; Objects_Locations location; the_semaphore = _Semaphore_Get( id, &location ); switch ( location ) { case OBJECTS_REMOTE: #if defined(RTEMS_MULTIPROCESSING) _Thread_Dispatch(); return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; #endif case OBJECTS_ERROR: return RTEMS_INVALID_ID; case OBJECTS_LOCAL: if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) { _CORE_mutex_Flush( &the_semaphore->Core_control.mutex, SEND_OBJECT_WAS_DELETED, CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT ); } else { _CORE_semaphore_Flush( &the_semaphore->Core_control.semaphore, SEND_OBJECT_WAS_DELETED, CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT ); } _Thread_Enable_dispatch(); return RTEMS_SUCCESSFUL; } return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ }
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