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/*
* Thread Handler
*
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/apiext.h>
#include <rtems/score/context.h>
#include <rtems/score/interr.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/priority.h>
#include <rtems/score/states.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/userext.h>
#include <rtems/score/wkspace.h>
/*PAGE
*
* _Thread_Handler_initialization
*
* This routine initializes all thread manager related data structures.
*
* Input parameters:
* ticks_per_timeslice - clock ticks per quantum
* maximum_proxies - number of proxies to initialize
*
* Output parameters: NONE
*/
void _Thread_Handler_initialization(
unsigned32 ticks_per_timeslice,
unsigned32 maximum_extensions,
unsigned32 maximum_proxies
)
{
unsigned32 index;
/*
* BOTH stacks hooks must be set or both must be NULL.
* Do not allow mixture.
*/
if ( !( ( _CPU_Table.stack_allocate_hook == 0 )
== ( _CPU_Table.stack_free_hook == 0 ) ) )
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
TRUE,
INTERNAL_ERROR_BAD_STACK_HOOK
);
_Context_Switch_necessary = FALSE;
_Thread_Executing = NULL;
_Thread_Heir = NULL;
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
_Thread_Allocated_fp = NULL;
#endif
_Thread_Do_post_task_switch_extension = 0;
_Thread_Maximum_extensions = maximum_extensions;
_Thread_Ticks_per_timeslice = ticks_per_timeslice;
_Thread_Ready_chain = (Chain_Control *) _Workspace_Allocate_or_fatal_error(
(PRIORITY_MAXIMUM + 1) * sizeof(Chain_Control)
);
for ( index=0; index <= PRIORITY_MAXIMUM ; index++ )
_Chain_Initialize_empty( &_Thread_Ready_chain[ index ] );
#if defined(RTEMS_MULTIPROCESSING)
_Thread_MP_Handler_initialization( maximum_proxies );
#endif
/*
* Initialize this class of objects.
*/
_Objects_Initialize_information(
&_Thread_Internal_information,
OBJECTS_INTERNAL_THREADS,
FALSE,
( _System_state_Is_multiprocessing ) ? 2 : 1,
sizeof( Thread_Control ),
TRUE,
8,
TRUE
);
}
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