void _POSIX_signals_Action_handler(
Thread_Control *executing,
Thread_Action *action,
Per_CPU_Control *cpu,
ISR_Level level
)
{
POSIX_API_Control *api;
int signo;
ISR_lock_Context lock_context;
int hold_errno;
(void) action;
_Thread_Action_release_and_ISR_enable( cpu, level );
api = executing->API_Extensions[ THREAD_API_POSIX ];
/*
* We need to ensure that if the signal handler executes a call
* which overwrites the unblocking status, we restore it.
*/
hold_errno = executing->Wait.return_code;
/*
* api may be NULL in case of a thread close in progress
*/
if ( !api )
return;
/*
* If we invoke any user code, there is the possibility that
* a new signal has been posted that we should process so we
* restart the loop if a signal handler was invoked.
*
* The first thing done is to check there are any signals to be
* processed at all. No point in doing this loop otherwise.
*/
while (1) {
_POSIX_signals_Acquire( &lock_context );
if ( !(~api->signals_blocked &
(api->signals_pending | _POSIX_signals_Pending)) ) {
_POSIX_signals_Release( &lock_context );
break;
}
_POSIX_signals_Release( &lock_context );
for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
/* Unfortunately - nothing like __SIGFIRSTNOTRT in newlib signal .h */
for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
}
executing->Wait.return_code = hold_errno;
}
static void _POSIX_signals_Post_switch_hook(
Thread_Control *the_thread
)
{
POSIX_API_Control *api;
int signo;
ISR_Level level;
int hold_errno;
Thread_Control *executing;
executing = _Thread_Get_executing();
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
/*
* We need to ensure that if the signal handler executes a call
* which overwrites the unblocking status, we restore it.
*/
hold_errno = executing->Wait.return_code;
/*
* api may be NULL in case of a thread close in progress
*/
if ( !api )
return;
/*
* If we invoke any user code, there is the possibility that
* a new signal has been posted that we should process so we
* restart the loop if a signal handler was invoked.
*
* The first thing done is to check there are any signals to be
* processed at all. No point in doing this loop otherwise.
*/
while (1) {
_ISR_Disable( level );
if ( !(~api->signals_blocked &
(api->signals_pending | _POSIX_signals_Pending)) ) {
_ISR_Enable( level );
break;
}
_ISR_Enable( level );
for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
/* Unfortunately - nothing like __SIGFIRSTNOTRT in newlib signal .h */
for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
}
executing->Wait.return_code = hold_errno;
}
static void _POSIX_signals_Action_handler(
Thread_Control *executing,
Thread_Action *action,
ISR_lock_Context *lock_context
)
{
POSIX_API_Control *api;
int signo;
uint32_t hold_errno;
(void) action;
_Thread_State_release( executing, lock_context );
api = executing->API_Extensions[ THREAD_API_POSIX ];
/*
* We need to ensure that if the signal handler executes a call
* which overwrites the unblocking status, we restore it.
*/
hold_errno = executing->Wait.return_code;
/*
* api may be NULL in case of a thread close in progress
*/
if ( !api )
return;
/*
* In case the executing thread is blocked or about to block on something
* that uses the thread wait information, then this is a kernel bug.
*/
_Assert(
( _Thread_Wait_flags_get( executing )
& ( THREAD_WAIT_STATE_BLOCKED | THREAD_WAIT_STATE_INTEND_TO_BLOCK ) ) == 0
);
/*
* If we invoke any user code, there is the possibility that
* a new signal has been posted that we should process so we
* restart the loop if a signal handler was invoked.
*
* The first thing done is to check there are any signals to be
* processed at all. No point in doing this loop otherwise.
*/
while (1) {
Thread_queue_Context queue_context;
_Thread_queue_Context_initialize( &queue_context );
_POSIX_signals_Acquire( &queue_context );
if ( !(api->signals_unblocked &
(api->signals_pending | _POSIX_signals_Pending)) ) {
_POSIX_signals_Release( &queue_context );
break;
}
_POSIX_signals_Release( &queue_context );
for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
/* Unfortunately - nothing like __SIGFIRSTNOTRT in newlib signal .h */
for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
_POSIX_signals_Check_signal( api, signo, false );
_POSIX_signals_Check_signal( api, signo, true );
}
}
executing->Wait.return_code = hold_errno;
}