void _Thread_Handler( void )
{
Thread_Control *executing = _Thread_Executing;
ISR_Level level;
/*
* Some CPUs need to tinker with the call frame or registers when the
* thread actually begins to execute for the first time. This is a
* hook point where the port gets a shot at doing whatever it requires.
*/
_Context_Initialization_at_thread_begin();
#if !defined(RTEMS_SMP)
/*
* have to put level into a register for those cpu's that use
* inline asm here
*/
level = executing->Start.isr_level;
_ISR_Set_level( level );
#endif
/*
* Initialize the floating point context because we do not come
* through _Thread_Dispatch on our first invocation. So the normal
* code path for performing the FP context switch is not hit.
*/
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
#if ( CPU_USE_DEFERRED_FP_SWITCH == TRUE )
if ( (executing->fp_context != NULL) &&
!_Thread_Is_allocated_fp( executing ) ) {
if ( _Thread_Allocated_fp != NULL )
_Context_Save_fp( &_Thread_Allocated_fp->fp_context );
_Thread_Allocated_fp = executing;
}
#endif
#endif
/*
* Take care that 'begin' extensions get to complete before
* 'switch' extensions can run. This means must keep dispatch
* disabled until all 'begin' extensions complete.
*/
_User_extensions_Thread_begin( executing );
/*
* At this point, the dispatch disable level BETTER be 1.
*/
#if defined(RTEMS_SMP)
{
/*
* On SMP we enter _Thread_Handler() with interrupts disabled and
* _Thread_Dispatch() obtained the per-CPU lock for us. We have to
* release it here and set the desired interrupt level of the thread.
*/
Per_CPU_Control *cpu_self = _Per_CPU_Get();
_Assert( cpu_self->thread_dispatch_disable_level == 1 );
_Assert( _ISR_Get_level() != 0 );
_Thread_Debug_set_real_processor( executing, cpu_self );
cpu_self->thread_dispatch_disable_level = 0;
_Profiling_Thread_dispatch_enable( cpu_self, 0 );
level = executing->Start.isr_level;
_ISR_Set_level( level);
/*
* The thread dispatch level changed from one to zero. Make sure we lose
* no thread dispatch necessary update.
*/
_Thread_Dispatch();
}
#else
_Thread_Enable_dispatch();
#endif
/*
* RTEMS supports multiple APIs and each API can define a different
* thread/task prototype. The following code supports invoking the
* user thread entry point using the prototype expected.
*/
if ( executing->Start.prototype == THREAD_START_NUMERIC ) {
executing->Wait.return_argument =
(*(Thread_Entry_numeric) executing->Start.entry_point)(
executing->Start.numeric_argument
);
}
#if defined(RTEMS_POSIX_API)
else if ( executing->Start.prototype == THREAD_START_POINTER ) {
executing->Wait.return_argument =
(*(Thread_Entry_pointer) executing->Start.entry_point)(
executing->Start.pointer_argument
);
}
#endif
#if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
else if ( executing->Start.prototype == THREAD_START_BOTH_POINTER_FIRST ) {
executing->Wait.return_argument =
(*(Thread_Entry_both_pointer_first) executing->Start.entry_point)(
executing->Start.pointer_argument,
executing->Start.numeric_argument
);
}
else if ( executing->Start.prototype == THREAD_START_BOTH_NUMERIC_FIRST ) {
executing->Wait.return_argument =
(*(Thread_Entry_both_numeric_first) executing->Start.entry_point)(
executing->Start.numeric_argument,
executing->Start.pointer_argument
);
}
#endif
/*
* In the switch above, the return code from the user thread body
* was placed in return_argument. This assumed that if it returned
* anything (which is not supporting in all APIs), then it would be
* able to fit in a (void *).
*/
_User_extensions_Thread_exitted( executing );
_Terminate(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_THREAD_EXITTED
);
}
void _Thread_Handler( void )
{
ISR_Level level;
Thread_Control *executing;
#if defined(EXECUTE_GLOBAL_CONSTRUCTORS)
static char doneConstructors;
char doneCons;
#endif
executing = _Thread_Executing;
/*
* Some CPUs need to tinker with the call frame or registers when the
* thread actually begins to execute for the first time. This is a
* hook point where the port gets a shot at doing whatever it requires.
*/
_Context_Initialization_at_thread_begin();
/*
* have to put level into a register for those cpu's that use
* inline asm here
*/
level = executing->Start.isr_level;
_ISR_Set_level(level);
#if defined(EXECUTE_GLOBAL_CONSTRUCTORS)
doneCons = doneConstructors;
doneConstructors = 1;
#endif
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
#if ( CPU_USE_DEFERRED_FP_SWITCH == TRUE )
if ( (executing->fp_context != NULL) &&
!_Thread_Is_allocated_fp( executing ) ) {
if ( _Thread_Allocated_fp != NULL )
_Context_Save_fp( &_Thread_Allocated_fp->fp_context );
_Thread_Allocated_fp = executing;
}
#endif
#endif
/*
* Take care that 'begin' extensions get to complete before
* 'switch' extensions can run. This means must keep dispatch
* disabled until all 'begin' extensions complete.
*/
_User_extensions_Thread_begin( executing );
/*
* At this point, the dispatch disable level BETTER be 1.
*/
_Thread_Enable_dispatch();
#if defined(EXECUTE_GLOBAL_CONSTRUCTORS)
/*
* _init could be a weak symbol and we SHOULD test it but it isn't
* in any configuration I know of and it generates a warning on every
* RTEMS target configuration. --joel (12 May 2007)
*/
if (!doneCons) /* && (volatile void *)_init) */ {
INIT_NAME ();
}
#endif
if ( executing->Start.prototype == THREAD_START_NUMERIC ) {
executing->Wait.return_argument =
(*(Thread_Entry_numeric) executing->Start.entry_point)(
executing->Start.numeric_argument
);
}
#if defined(RTEMS_POSIX_API)
else if ( executing->Start.prototype == THREAD_START_POINTER ) {
executing->Wait.return_argument =
(*(Thread_Entry_pointer) executing->Start.entry_point)(
executing->Start.pointer_argument
);
}
#endif
#if defined(FUNCTIONALITY_NOT_CURRENTLY_USED_BY_ANY_API)
else if ( executing->Start.prototype == THREAD_START_BOTH_POINTER_FIRST ) {
executing->Wait.return_argument =
(*(Thread_Entry_both_pointer_first) executing->Start.entry_point)(
executing->Start.pointer_argument,
executing->Start.numeric_argument
);
}
else if ( executing->Start.prototype == THREAD_START_BOTH_NUMERIC_FIRST ) {
executing->Wait.return_argument =
(*(Thread_Entry_both_numeric_first) executing->Start.entry_point)(
executing->Start.numeric_argument,
executing->Start.pointer_argument
);
}
#endif
/*
* In the switch above, the return code from the user thread body
* was placed in return_argument. This assumed that if it returned
* anything (which is not supporting in all APIs), then it would be
* able to fit in a (void *).
*/
_User_extensions_Thread_exitted( executing );
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_THREAD_EXITTED
);
}
void _Thread_Handler( void )
{
Thread_Control *executing;
ISR_Level level;
Per_CPU_Control *cpu_self;
/*
* Some CPUs need to tinker with the call frame or registers when the
* thread actually begins to execute for the first time. This is a
* hook point where the port gets a shot at doing whatever it requires.
*/
_Context_Initialization_at_thread_begin();
executing = _Thread_Executing;
/*
* have to put level into a register for those cpu's that use
* inline asm here
*/
level = executing->Start.isr_level;
_ISR_Set_level( level );
/*
* Initialize the floating point context because we do not come
* through _Thread_Dispatch on our first invocation. So the normal
* code path for performing the FP context switch is not hit.
*/
_Thread_Restore_fp( executing );
/*
* Do not use the level of the thread control block, since it has a
* different format.
*/
_ISR_Local_disable( level );
/*
* At this point, the dispatch disable level BETTER be 1.
*/
cpu_self = _Per_CPU_Get();
_Assert( cpu_self->thread_dispatch_disable_level == 1 );
/*
* Make sure we lose no thread dispatch necessary update and execute the
* post-switch actions. As a side-effect change the thread dispatch level
* from one to zero. Do not use _Thread_Enable_dispatch() since there is no
* valid thread dispatch necessary indicator in this context.
*/
_Thread_Do_dispatch( cpu_self, level );
/*
* Invoke the thread begin extensions in the context of the thread entry
* function with thread dispatching enabled. This enables use of dynamic
* memory allocation, creation of POSIX keys and use of C++ thread local
* storage. Blocking synchronization primitives are allowed also.
*/
_User_extensions_Thread_begin( executing );
/*
* RTEMS supports multiple APIs and each API can define a different
* thread/task prototype. The following code supports invoking the
* user thread entry point using the prototype expected.
*/
( *executing->Start.Entry.adaptor )( executing );
/*
* In the call above, the return code from the user thread body which return
* something was placed in return_argument. This assumed that if it
* returned anything (which is not supporting in all APIs), then it would be
* able to fit in a (void *).
*/
_User_extensions_Thread_exitted( executing );
_Internal_error( INTERNAL_ERROR_THREAD_EXITTED );
}
