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+/* thread.inl
+ *
+ * This file contains the macro implementation of the inlined
+ * routines from the Thread handler.
+ *
+ * COPYRIGHT (c) 1989-1997.
+ * On-Line Applications Research Corporation (OAR).
+ * Copyright assigned to U.S. Government, 1994.
+ *
+ * The license and distribution terms for this file may in
+ * the file LICENSE in this distribution or at
+ * http://www.OARcorp.com/rtems/license.html.
+ *
+ * $Id$
+ */
+
+#ifndef __THREAD_inl
+#define __THREAD_inl
+
+/*PAGE
+ *
+ * _Thread_Stop_multitasking
+ *
+ * DESCRIPTION:
+ *
+ * This routine halts multitasking and returns control to
+ * the "thread" (i.e. the BSP) which initially invoked the
+ * routine which initialized the system.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Stop_multitasking( void )
+{
+ _Context_Switch( &_Thread_Executing->Registers, &_Thread_BSP_context );
+}
+
+/*PAGE
+ *
+ * _Thread_Is_executing
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the_thread is the currently executing
+ * thread, and FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_executing (
+ Thread_Control *the_thread
+)
+{
+ return ( the_thread == _Thread_Executing );
+}
+
+/*PAGE
+ *
+ * _Thread_Is_heir
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the_thread is the heir
+ * thread, and FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_heir (
+ Thread_Control *the_thread
+)
+{
+ return ( the_thread == _Thread_Heir );
+}
+
+/*PAGE
+ *
+ * _Thread_Is_executing_also_the_heir
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the currently executing thread
+ * is also the heir thread, and FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_executing_also_the_heir( void )
+{
+ return ( _Thread_Executing == _Thread_Heir );
+}
+
+/*PAGE
+ *
+ * _Thread_Resume
+ *
+ * DESCRIPTION:
+ *
+ * This routine clears the SUSPENDED state for the_thread. It performs
+ * any necessary scheduling operations including the selection of
+ * a new heir thread.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Resume (
+ Thread_Control *the_thread
+)
+{
+ _Thread_Clear_state( the_thread, STATES_SUSPENDED );
+}
+
+/*PAGE
+ *
+ * _Thread_Unblock
+ *
+ * DESCRIPTION:
+ *
+ * This routine clears any blocking state for the_thread. It performs
+ * any necessary scheduling operations including the selection of
+ * a new heir thread.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Unblock (
+ Thread_Control *the_thread
+)
+{
+ _Thread_Clear_state( the_thread, STATES_BLOCKED );
+}
+
+/*PAGE
+ *
+ * _Thread_Restart_self
+ *
+ * DESCRIPTION:
+ *
+ * This routine resets the current context of the calling thread
+ * to that of its initial state.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Restart_self( void )
+{
+ if ( _Thread_Executing->fp_context != NULL )
+ _Context_Restore_fp( &_Thread_Executing->fp_context );
+
+ _CPU_Context_Restart_self( &_Thread_Executing->Registers );
+}
+
+/*PAGE
+ *
+ * _Thread_Calculate_heir
+ *
+ * DESCRIPTION:
+ *
+ * This function returns a pointer to the highest priority
+ * ready thread.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Calculate_heir( void )
+{
+ _Thread_Heir = (Thread_Control *)
+ _Thread_Ready_chain[ _Priority_Get_highest() ].first;
+}
+
+/*PAGE
+ *
+ * _Thread_Is_allocated_fp
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the floating point context of
+ * the_thread is currently loaded in the floating point unit, and
+ * FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_allocated_fp (
+ Thread_Control *the_thread
+)
+{
+ return ( the_thread == _Thread_Allocated_fp );
+}
+
+/*PAGE
+ *
+ * _Thread_Deallocate_fp
+ *
+ * DESCRIPTION:
+ *
+ * This routine is invoked when the currently loaded floating
+ * point context is now longer associated with an active thread.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Deallocate_fp( void )
+{
+ _Thread_Allocated_fp = NULL;
+}
+
+/*PAGE
+ *
+ * _Thread_Disable_dispatch
+ *
+ * DESCRIPTION:
+ *
+ * This routine prevents dispatching.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Disable_dispatch( void )
+{
+ _Thread_Dispatch_disable_level += 1;
+}
+
+/*PAGE
+ *
+ * _Thread_Enable_dispatch
+ *
+ * DESCRIPTION:
+ *
+ * This routine allows dispatching to occur again. If this is
+ * the outer most dispatching critical section, then a dispatching
+ * operation will be performed and, if necessary, control of the
+ * processor will be transferred to the heir thread.
+ */
+
+#if ( CPU_INLINE_ENABLE_DISPATCH == TRUE )
+RTEMS_INLINE_ROUTINE void _Thread_Enable_dispatch()
+{
+ if ( (--_Thread_Dispatch_disable_level) == 0 )
+ _Thread_Dispatch();
+}
+#endif
+
+#if ( CPU_INLINE_ENABLE_DISPATCH == FALSE )
+void _Thread_Enable_dispatch( void );
+#endif
+
+/*PAGE
+ *
+ * _Thread_Unnest_dispatch
+ *
+ * DESCRIPTION:
+ *
+ * This routine allows dispatching to occur again. However,
+ * no dispatching operation is performed even if this is the outer
+ * most dispatching critical section.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Unnest_dispatch( void )
+{
+ _Thread_Dispatch_disable_level -= 1;
+}
+
+/*PAGE
+ *
+ * _Thread_Is_dispatching_enabled
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if dispatching is disabled, and FALSE
+ * otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_dispatching_enabled( void )
+{
+ return ( _Thread_Dispatch_disable_level == 0 );
+}
+
+/*PAGE
+ *
+ * _Thread_Is_context_switch_necessary
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if dispatching is disabled, and FALSE
+ * otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_context_switch_necessary( void )
+{
+ return ( _Context_Switch_necessary );
+}
+
+/*PAGE
+ *
+ * _Thread_Dispatch_initialization
+ *
+ * DESCRIPTION:
+ *
+ * This routine initializes the thread dispatching subsystem.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Dispatch_initialization( void )
+{
+ _Thread_Dispatch_disable_level = 1;
+}
+
+/*PAGE
+ *
+ * _Thread_Is_null
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the_thread is NULL and FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_null (
+ Thread_Control *the_thread
+)
+{
+ return ( the_thread == NULL );
+}
+
+/*PAGE
+ *
+ * _Thread_Get
+ *
+ * DESCRIPTION:
+ *
+ * This function maps thread IDs to thread control
+ * blocks. If ID corresponds to a local thread, then it
+ * returns the_thread control pointer which maps to ID
+ * and location is set to OBJECTS_LOCAL. If the thread ID is
+ * global and resides on a remote node, then location is set
+ * to OBJECTS_REMOTE, and the_thread is undefined.
+ * Otherwise, location is set to OBJECTS_ERROR and
+ * the_thread is undefined.
+ *
+ * NOTE: XXX... This routine may be able to be optimized.
+ */
+
+RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Get (
+ Objects_Id id,
+ Objects_Locations *location
+)
+{
+ Objects_Classes the_class;
+ Objects_Information *information;
+ Thread_Control *tp = (Thread_Control *) 0;
+
+ if ( _Objects_Are_ids_equal( id, OBJECTS_ID_OF_SELF ) ) {
+ _Thread_Disable_dispatch();
+ *location = OBJECTS_LOCAL;
+ tp = _Thread_Executing;
+ goto done;
+ }
+
+ the_class = _Objects_Get_class( id );
+
+ if ( the_class > OBJECTS_CLASSES_LAST ) {
+ *location = OBJECTS_ERROR;
+ goto done;
+ }
+
+ information = _Objects_Information_table[ the_class ];
+
+ if ( !information || !information->is_thread ) {
+ *location = OBJECTS_ERROR;
+ goto done;
+ }
+
+ tp = (Thread_Control *) _Objects_Get( information, id, location );
+
+done:
+ return tp;
+}
+
+
+/*
+ * _Thread_Is_proxy_blocking
+ *
+ * DESCRIPTION:
+ *
+ * This function returns TRUE if the status code is equal to the
+ * status which indicates that a proxy is blocking, and FALSE otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE boolean _Thread_Is_proxy_blocking (
+ unsigned32 code
+)
+{
+ return (code == THREAD_STATUS_PROXY_BLOCKING);
+}
+
+/*PAGE
+ *
+ * _Thread_Internal_allocate
+ *
+ * DESCRIPTION:
+ *
+ * This routine allocates an internal thread.
+ */
+
+RTEMS_INLINE_ROUTINE Thread_Control *_Thread_Internal_allocate( void )
+{
+ return (Thread_Control *) _Objects_Allocate( &_Thread_Internal_information );
+}
+
+/*PAGE
+ *
+ * _Thread_Internal_free
+ *
+ * DESCRIPTION:
+ *
+ * This routine frees an internal thread.
+ */
+
+RTEMS_INLINE_ROUTINE void _Thread_Internal_free (
+ Thread_Control *the_task
+)
+{
+ _Objects_Free( &_Thread_Internal_information, &the_task->Object );
+}
+
+#endif
+/* end of include file */