diff options
Diffstat (limited to 'cpukit/score/include/rtems/score/userextimpl.h')
-rw-r--r-- | cpukit/score/include/rtems/score/userextimpl.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/cpukit/score/include/rtems/score/userextimpl.h b/cpukit/score/include/rtems/score/userextimpl.h index 04808e1f17..19055f976b 100644 --- a/cpukit/score/include/rtems/score/userextimpl.h +++ b/cpukit/score/include/rtems/score/userextimpl.h @@ -216,13 +216,21 @@ static inline void _User_extensions_Thread_switch( const Chain_Node *tail = _Chain_Immutable_tail( chain ); const Chain_Node *node = _Chain_Immutable_first( chain ); - while ( node != tail ) { - const User_extensions_Switch_control *extension = - (const User_extensions_Switch_control *) node; + if ( node != tail ) { + Per_CPU_Control *cpu_self = _Per_CPU_Get(); - (*extension->thread_switch)( executing, heir ); + _Per_CPU_Acquire( cpu_self ); - node = _Chain_Immutable_next( node ); + while ( node != tail ) { + const User_extensions_Switch_control *extension = + (const User_extensions_Switch_control *) node; + + (*extension->thread_switch)( executing, heir ); + + node = _Chain_Immutable_next( node ); + } + + _Per_CPU_Release( cpu_self ); } } |