int _POSIX_signals_Get_highest(
sigset_t set
)
{
int signo;
for ( signo = SIGRTMIN ; signo <= SIGRTMAX ; signo++ ) {
if ( set & signo_to_mask( signo ) ) {
goto found_it;
}
}
/*
* We assume SIGHUP == 1 and is the first non-real-time signal.
*/
#if (SIGHUP != 1)
#error "Assumption that SIGHUP==1 violated!!"
#endif
for ( signo = SIGHUP ; signo <= __SIGLASTNOTRT ; signo++ ) {
if ( set & signo_to_mask( signo ) ) {
goto found_it;
}
}
/*
* This is structured this way to eliminate the need to have
* a return 0. This routine will NOT be called unless a signal
* is pending in the set passed in.
*/
found_it:
return signo;
}
int pthread_kill( pthread_t thread, int sig )
{
Thread_Control *the_thread;
ISR_lock_Context lock_context;
POSIX_API_Control *api;
Per_CPU_Control *cpu_self;
if ( !is_valid_signo( sig ) ) {
return EINVAL;
}
the_thread = _Thread_Get( thread, &lock_context );
if ( the_thread == NULL ) {
return ESRCH;
}
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) {
_ISR_lock_ISR_enable( &lock_context );
return 0;
}
/* XXX critical section */
api->signals_pending |= signo_to_mask( sig );
cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
_ISR_lock_ISR_enable( &lock_context );
(void) _POSIX_signals_Unblock_thread( the_thread, sig, NULL );
_Thread_Dispatch_enable( cpu_self );
return 0;
}
boolean _POSIX_signals_Clear_signals(
POSIX_API_Control *api,
int signo,
siginfo_t *info,
boolean is_global,
boolean check_blocked
)
{
sigset_t mask;
sigset_t signals_blocked;
ISR_Level level;
boolean do_callout;
POSIX_signals_Siginfo_node *psiginfo;
mask = signo_to_mask( signo );
do_callout = FALSE;
/* set blocked signals based on if checking for them, SIGNAL_ALL_MASK
* insures that no signals are blocked and all are checked.
*/
if ( check_blocked )
signals_blocked = ~api->signals_blocked;
else
signals_blocked = SIGNAL_ALL_MASK;
/* XXX this is not right for siginfo type signals yet */
/* XXX since they can't be cleared the same way */
_ISR_Disable( level );
if ( is_global ) {
if ( mask & (_POSIX_signals_Pending & signals_blocked) ) {
if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) {
psiginfo = (POSIX_signals_Siginfo_node *)
_Chain_Get_unprotected( &_POSIX_signals_Siginfo[ signo ] );
if ( _Chain_Is_empty( &_POSIX_signals_Siginfo[ signo ] ) )
_POSIX_signals_Clear_process_signals( mask );
if ( psiginfo ) {
*info = psiginfo->Info;
_Chain_Append_unprotected(
&_POSIX_signals_Inactive_siginfo,
&psiginfo->Node
);
} else
do_callout = FALSE;
} else
_POSIX_signals_Clear_process_signals( mask );
do_callout = TRUE;
}
} else {
if ( mask & (api->signals_pending & signals_blocked) ) {
api->signals_pending &= ~mask;
do_callout = TRUE;
}
}
_ISR_Enable( level );
return do_callout;
}
int pthread_kill(
pthread_t thread,
int sig
)
{
POSIX_API_Control *api;
Thread_Control *the_thread;
Objects_Locations location;
if ( !sig )
rtems_set_errno_and_return_minus_one( EINVAL );
if ( !is_valid_signo(sig) )
rtems_set_errno_and_return_minus_one( EINVAL );
/* commented out when posix timers added
if ( _POSIX_signals_Vectors[ sig ].sa_flags == SA_SIGINFO )
rtems_set_errno_and_return_minus_one( ENOSYS );
*/
the_thread = _POSIX_Threads_Get( thread, &location );
switch ( location ) {
case OBJECTS_ERROR:
case OBJECTS_REMOTE:
rtems_set_errno_and_return_minus_one( ESRCH );
case OBJECTS_LOCAL:
/*
* If sig == 0 then just validate arguments
*/
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( sig ) {
if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) {
_Thread_Enable_dispatch();
return 0;
}
/* XXX critical section */
api->signals_pending |= signo_to_mask( sig );
(void) _POSIX_signals_Unblock_thread( the_thread, sig, NULL );
the_thread->do_post_task_switch_extension = TRUE;
if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) )
_ISR_Signals_to_thread_executing = TRUE;
}
_Thread_Enable_dispatch();
return 0;
}
return POSIX_BOTTOM_REACHED();
}
int pthread_kill(
pthread_t thread,
int sig
)
{
POSIX_API_Control *api;
Thread_Control *the_thread;
Objects_Locations location;
if ( !sig )
rtems_set_errno_and_return_minus_one( EINVAL );
if ( !is_valid_signo(sig) )
rtems_set_errno_and_return_minus_one( EINVAL );
the_thread = _Thread_Get( thread, &location );
switch ( location ) {
case OBJECTS_LOCAL:
/*
* If sig == 0 then just validate arguments
*/
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( sig ) {
if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN ) {
_Thread_Enable_dispatch();
return 0;
}
/* XXX critical section */
api->signals_pending |= signo_to_mask( sig );
(void) _POSIX_signals_Unblock_thread( the_thread, sig, NULL );
the_thread->do_post_task_switch_extension = true;
if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) )
_ISR_Signals_to_thread_executing = true;
}
_Thread_Enable_dispatch();
return 0;
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
#endif
case OBJECTS_ERROR:
break;
}
rtems_set_errno_and_return_minus_one( ESRCH );
}
int sigismember(
const sigset_t *set,
int signo
)
{
if ( !set )
rtems_set_errno_and_return_minus_one( EINVAL );
if ( !signo )
return 0;
if ( !is_valid_signo(signo) )
rtems_set_errno_and_return_minus_one( EINVAL );
if ( *set & signo_to_mask(signo) )
return 1;
return 0;
}
void *POSIX_Init(
void *argument
)
{
struct sigaction act;
siginfo_t info;
bool bc;
TEST_BEGIN();
act.sa_handler = NULL;
act.sa_sigaction = Signal_handler;
act.sa_flags = SA_SIGINFO;
sigaction( SIGNAL_ONE, &act, NULL );
sigaction( SIGNAL_TWO, &act, NULL );
printf(
"Init - _POSIX_signals_Clear_signals when signals pending but\n"
"Init - not queued on SA_SIGINFO configured signal.\n"
);
/* cheat and put signal directly in */
_POSIX_signals_Pending |= signo_to_mask( SIGUSR1 );
bc = _POSIX_signals_Clear_signals(
_Thread_Get_executing()->API_Extensions[ THREAD_API_POSIX ],
SIGNAL_ONE,
&info,
true, /* is_global */
false, /* check_blocked */
true /* do_signals_acquire_release */
);
rtems_test_assert( bc );
TEST_END();
rtems_test_exit(0);
return NULL; /* just so the compiler thinks we returned something */
}
void _POSIX_signals_Clear_process_signals(
int signo
)
{
sigset_t mask;
bool clear_signal;
clear_signal = true;
mask = signo_to_mask( signo );
ISR_Level level;
_ISR_Disable( level );
if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) {
if ( !_Chain_Is_empty( &_POSIX_signals_Siginfo[ signo ] ) )
clear_signal = false;
}
if ( clear_signal ) {
_POSIX_signals_Pending &= ~mask;
}
_ISR_Enable( level );
}
int killinfo(
pid_t pid,
int sig,
const union sigval *value
)
{
sigset_t mask;
POSIX_API_Control *api;
uint32_t the_api;
uint32_t index;
uint32_t maximum;
Objects_Information *the_info;
Objects_Control **object_table;
Thread_Control *the_thread;
Thread_Control *interested;
Priority_Control interested_priority;
Chain_Control *the_chain;
Chain_Node *the_node;
siginfo_t siginfo_struct;
siginfo_t *siginfo;
POSIX_signals_Siginfo_node *psiginfo;
/*
* Only supported for the "calling process" (i.e. this node).
*/
if ( pid != getpid() )
rtems_set_errno_and_return_minus_one( ESRCH );
/*
* Validate the signal passed.
*/
if ( !sig )
rtems_set_errno_and_return_minus_one( EINVAL );
if ( !is_valid_signo(sig) )
rtems_set_errno_and_return_minus_one( EINVAL );
/*
* If the signal is being ignored, then we are out of here.
*/
if ( _POSIX_signals_Vectors[ sig ].sa_handler == SIG_IGN )
return 0;
/*
* P1003.1c/Draft 10, p. 33 says that certain signals should always
* be directed to the executing thread such as those caused by hardware
* faults.
*/
if ( (sig == SIGFPE) || (sig == SIGILL) || (sig == SIGSEGV ) )
return pthread_kill( pthread_self(), sig );
mask = signo_to_mask( sig );
/*
* Build up a siginfo structure
*/
siginfo = &siginfo_struct;
siginfo->si_signo = sig;
siginfo->si_code = SI_USER;
if ( !value ) {
siginfo->si_value.sival_int = 0;
} else {
siginfo->si_value = *value;
}
_Thread_Disable_dispatch();
/*
* Is the currently executing thread interested? If so then it will
* get it an execute it as soon as the dispatcher executes.
*/
the_thread = _Thread_Executing;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
if ( _POSIX_signals_Is_interested( api, mask ) ) {
goto process_it;
}
/*
* Is an interested thread waiting for this signal (sigwait())?
*
* There is no requirement on the order of threads pending on a sigwait().
*/
/* XXX violation of visibility -- need to define thread queue support */
the_chain = &_POSIX_signals_Wait_queue.Queues.Fifo;
for ( the_node = _Chain_First( the_chain );
!_Chain_Is_tail( the_chain, the_node ) ;
the_node = the_node->next ) {
the_thread = THREAD_CHAIN_NODE_TO_THREAD( the_node );
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
#if defined(DEBUG_SIGNAL_PROCESSING)
printk( "Waiting Thread=%p option=0x%08x mask=0x%08x blocked=0x%08x\n",
the_thread, the_thread->Wait.option, mask, api->signals_blocked);
#endif
/*
* Is this thread is actually blocked waiting for the signal?
*/
if (the_thread->Wait.option & mask)
goto process_it;
/*
* Is this thread is blocked waiting for another signal but has
* not blocked this one?
*/
if (~api->signals_blocked & mask)
goto process_it;
}
/*
* Is any other thread interested? The highest priority interested
* thread is selected. In the event of a tie, then the following
* additional criteria is used:
*
* + ready thread over blocked
* + blocked on call interruptible by signal (can return EINTR)
* + blocked on call not interruptible by signal
*
* This looks at every thread in the system regardless of the creating API.
*
* NOTES:
*
* + rtems internal threads do not receive signals.
*/
interested = NULL;
interested_priority = PRIORITY_MAXIMUM + 1;
for (the_api = OBJECTS_CLASSIC_API; the_api <= OBJECTS_APIS_LAST; the_api++) {
/*
* This can occur when no one is interested and an API is not configured.
*/
if ( !_Objects_Information_table[ the_api ] )
continue;
the_info = _Objects_Information_table[ the_api ][ 1 ];
#if defined(RTEMS_DEBUG)
/*
* This cannot happen in the current (as of June 2009) implementation
* of initialization but at some point, the object information
* structure for a particular manager may not be installed.
*/
if ( !the_info )
continue;
#endif
maximum = the_info->maximum;
object_table = the_info->local_table;
for ( index = 1 ; index <= maximum ; index++ ) {
the_thread = (Thread_Control *) object_table[ index ];
if ( !the_thread )
continue;
#if defined(DEBUG_SIGNAL_PROCESSING)
printk("\n 0x%08x/0x%08x %d/%d 0x%08x 1",
the_thread->Object.id,
((interested) ? interested->Object.id : 0),
the_thread->current_priority, interested_priority,
the_thread->current_state
);
#endif
/*
* If this thread is of lower priority than the interested thread,
* go on to the next thread.
*/
if ( the_thread->current_priority > interested_priority )
continue;
DEBUG_STEP("2");
/*
* If this thread is not interested, then go on to the next thread.
*/
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
#if defined(RTEMS_DEBUG)
if ( !api )
continue;
#endif
if ( !_POSIX_signals_Is_interested( api, mask ) )
continue;
DEBUG_STEP("3");
/*
* Now we know the thread under consideration is interested.
* If the thread under consideration is of higher priority, then
* it becomes the interested thread.
*
* NOTE: We initialized interested_priority to PRIORITY_MAXIMUM + 1
* so we never have to worry about deferencing a NULL
* interested thread.
*/
if ( the_thread->current_priority < interested_priority ) {
interested = the_thread;
interested_priority = the_thread->current_priority;
continue;
}
DEBUG_STEP("4");
/*
* Now the thread and the interested thread have the same priority.
* We have to sort through the combinations of blocked/not blocked
* and blocking interruptibutable by signal.
*
* If the interested thread is ready, don't think about changing.
*/
if ( interested && !_States_Is_ready( interested->current_state ) ) {
/* preferred ready over blocked */
DEBUG_STEP("5");
if ( _States_Is_ready( the_thread->current_state ) ) {
interested = the_thread;
interested_priority = the_thread->current_priority;
continue;
}
DEBUG_STEP("6");
/* prefer blocked/interruptible over blocked/not interruptible */
if ( !_States_Is_interruptible_by_signal(interested->current_state) ) {
DEBUG_STEP("7");
if ( _States_Is_interruptible_by_signal(the_thread->current_state) ) {
DEBUG_STEP("8");
interested = the_thread;
interested_priority = the_thread->current_priority;
continue;
}
}
}
}
}
if ( interested ) {
the_thread = interested;
goto process_it;
}
/*
* OK so no threads were interested right now. It will be left on the
* global pending until a thread receives it. The global set of threads
* can change interest in this signal in one of the following ways:
*
* + a thread is created with the signal unblocked,
* + pthread_sigmask() unblocks the signal,
* + sigprocmask() unblocks the signal, OR
* + sigaction() which changes the handler to SIG_IGN.
*/
the_thread = NULL;
goto post_process_signal;
/*
* We found a thread which was interested, so now we mark that this
* thread needs to do the post context switch extension so it can
* evaluate the signals pending.
*/
process_it:
/*
* Returns true if the signal was synchronously given to a thread
* blocked waiting for the signal.
*/
if ( _POSIX_signals_Unblock_thread( the_thread, sig, siginfo ) ) {
_Thread_Enable_dispatch();
return 0;
}
post_process_signal:
/*
* We may have woken up a thread but we definitely need to post the
* signal to the process wide information set.
*/
_POSIX_signals_Set_process_signals( mask );
if ( _POSIX_signals_Vectors[ sig ].sa_flags == SA_SIGINFO ) {
psiginfo = (POSIX_signals_Siginfo_node *)
_Chain_Get( &_POSIX_signals_Inactive_siginfo );
if ( !psiginfo ) {
_Thread_Enable_dispatch();
rtems_set_errno_and_return_minus_one( EAGAIN );
}
psiginfo->Info = *siginfo;
_Chain_Append( &_POSIX_signals_Siginfo[ sig ], &psiginfo->Node );
}
DEBUG_STEP("\n");
_Thread_Enable_dispatch();
return 0;
}
/* XXX this routine could probably be cleaned up */
bool _POSIX_signals_Unblock_thread(
Thread_Control *the_thread,
int signo,
siginfo_t *info
)
{
POSIX_API_Control *api;
sigset_t mask;
siginfo_t *the_info = NULL;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
mask = signo_to_mask( signo );
/*
* Is the thread is specifically waiting for a signal?
*/
if ( _States_Is_interruptible_signal( the_thread->current_state ) ) {
if ( (the_thread->Wait.option & mask) || (~api->signals_blocked & mask) ) {
the_thread->Wait.return_code = EINTR;
the_info = (siginfo_t *) the_thread->Wait.return_argument;
if ( !info ) {
the_info->si_signo = signo;
the_info->si_code = SI_USER;
the_info->si_value.sival_int = 0;
} else {
*the_info = *info;
}
_Thread_queue_Extract_with_proxy( the_thread );
return true;
}
/*
* This should only be reached via pthread_kill().
*/
return false;
}
/*
* Thread is not waiting due to a sigwait.
*/
if ( ~api->signals_blocked & mask ) {
/*
* The thread is interested in this signal. We are going
* to post it. We have a few broad cases:
* + If it is blocked on an interruptible signal, THEN
* we unblock the thread.
* + If it is in the ready state AND
* we are sending from an ISR AND
* it is the interrupted thread AND
* it is not blocked, THEN
* we need to dispatch at the end of this ISR.
* + Any other combination, do nothing.
*/
the_thread->do_post_task_switch_extension = true;
if ( _States_Is_interruptible_by_signal( the_thread->current_state ) ) {
the_thread->Wait.return_code = EINTR;
/*
* In pthread_cond_wait, a thread will be blocking on a thread
* queue, but is also interruptible by a POSIX signal.
*/
if ( _States_Is_waiting_on_thread_queue(the_thread->current_state) )
_Thread_queue_Extract_with_proxy( the_thread );
else if ( _States_Is_delaying(the_thread->current_state) ){
(void) _Watchdog_Remove( &the_thread->Timer );
_Thread_Unblock( the_thread );
}
} else if ( the_thread->current_state == STATES_READY ) {
if ( _ISR_Is_in_progress() && _Thread_Is_executing( the_thread ) )
_ISR_Signals_to_thread_executing = true;
}
}
return false;
}
bool _POSIX_signals_Clear_signals(
POSIX_API_Control *api,
int signo,
siginfo_t *info,
bool is_global,
bool check_blocked
)
{
sigset_t mask;
sigset_t signals_blocked;
ISR_Level level;
bool do_callout;
POSIX_signals_Siginfo_node *psiginfo;
mask = signo_to_mask( signo );
do_callout = false;
/* set blocked signals based on if checking for them, SIGNAL_ALL_MASK
* insures that no signals are blocked and all are checked.
*/
if ( check_blocked )
signals_blocked = ~api->signals_blocked;
else
signals_blocked = SIGNAL_ALL_MASK;
/* XXX is this right for siginfo type signals? */
/* XXX are we sure they can be cleared the same way? */
_ISR_Disable( level );
if ( is_global ) {
if ( mask & (_POSIX_signals_Pending & signals_blocked) ) {
if ( _POSIX_signals_Vectors[ signo ].sa_flags == SA_SIGINFO ) {
psiginfo = (POSIX_signals_Siginfo_node *)
_Chain_Get_unprotected( &_POSIX_signals_Siginfo[ signo ] );
_POSIX_signals_Clear_process_signals( signo );
/*
* It may be impossible to get here with an empty chain
* BUT until that is proven we need to be defensive and
* protect against it.
*/
if ( psiginfo ) {
*info = psiginfo->Info;
_Chain_Append_unprotected(
&_POSIX_signals_Inactive_siginfo,
&psiginfo->Node
);
} else
do_callout = false;
}
_POSIX_signals_Clear_process_signals( signo );
do_callout = true;
}
} else {
if ( mask & (api->signals_pending & signals_blocked) ) {
api->signals_pending &= ~mask;
do_callout = true;
}
}
_ISR_Enable( level );
return do_callout;
}
int sigtimedwait(
const sigset_t *set,
siginfo_t *info,
const struct timespec *timeout
)
{
Thread_Control *the_thread;
POSIX_API_Control *api;
Watchdog_Interval interval;
siginfo_t signal_information;
siginfo_t *the_info;
int signo;
ISR_Level level;
/*
* Error check parameters before disabling interrupts.
*/
if ( !set )
rtems_set_errno_and_return_minus_one( EINVAL );
/* NOTE: This is very specifically a RELATIVE not ABSOLUTE time
* in the Open Group specification.
*/
interval = 0;
if ( timeout ) {
if ( !_Timespec_Is_valid( timeout ) )
rtems_set_errno_and_return_minus_one( EINVAL );
interval = _Timespec_To_ticks( timeout );
if ( !interval )
rtems_set_errno_and_return_minus_one( EINVAL );
}
/*
* Initialize local variables.
*/
the_info = ( info ) ? info : &signal_information;
the_thread = _Thread_Executing;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
/*
* What if they are already pending?
*/
/* API signals pending? */
_ISR_Disable( level );
if ( *set & api->signals_pending ) {
/* XXX real info later */
the_info->si_signo = _POSIX_signals_Get_lowest( api->signals_pending );
_POSIX_signals_Clear_signals(
api,
the_info->si_signo,
the_info,
false,
false
);
_ISR_Enable( level );
the_info->si_code = SI_USER;
the_info->si_value.sival_int = 0;
return the_info->si_signo;
}
/* Process pending signals? */
if ( *set & _POSIX_signals_Pending ) {
signo = _POSIX_signals_Get_lowest( _POSIX_signals_Pending );
_POSIX_signals_Clear_signals( api, signo, the_info, true, false );
_ISR_Enable( level );
the_info->si_signo = signo;
the_info->si_code = SI_USER;
the_info->si_value.sival_int = 0;
return signo;
}
the_info->si_signo = -1;
_Thread_Disable_dispatch();
the_thread->Wait.queue = &_POSIX_signals_Wait_queue;
the_thread->Wait.return_code = EINTR;
the_thread->Wait.option = *set;
the_thread->Wait.return_argument = the_info;
_Thread_queue_Enter_critical_section( &_POSIX_signals_Wait_queue );
_ISR_Enable( level );
_Thread_queue_Enqueue( &_POSIX_signals_Wait_queue, interval );
_Thread_Enable_dispatch();
/*
* When the thread is set free by a signal, it is need to eliminate
* the signal.
*/
_POSIX_signals_Clear_signals( api, the_info->si_signo, the_info, false, false );
/* Set errno only if return code is not EINTR or
* if EINTR was caused by a signal being caught, which
* was not in our set.
*/
if ( (_Thread_Executing->Wait.return_code != EINTR)
|| !(*set & signo_to_mask( the_info->si_signo )) ) {
errno = _Thread_Executing->Wait.return_code;
return -1;
}
return the_info->si_signo;
}
/* XXX this routine could probably be cleaned up */
boolean _POSIX_signals_Unblock_thread(
Thread_Control *the_thread,
int signo,
siginfo_t *info
)
{
POSIX_API_Control *api;
sigset_t mask;
siginfo_t *the_info = NULL;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
mask = signo_to_mask( signo );
/*
* Is the thread is specifically waiting for a signal?
*/
if ( _States_Is_interruptible_signal( the_thread->current_state ) ) {
if ( (the_thread->Wait.option & mask) || (~api->signals_blocked & mask) ) {
the_thread->Wait.return_code = EINTR;
the_info = (siginfo_t *) the_thread->Wait.return_argument;
if ( !info ) {
the_info->si_signo = signo;
the_info->si_code = SI_USER;
the_info->si_value.sival_int = 0;
} else {
*the_info = *info;
}
_Thread_queue_Extract_with_proxy( the_thread );
return TRUE;
}
/*
* This should only be reached via pthread_kill().
*/
return FALSE;
}
if ( ~api->signals_blocked & mask ) {
the_thread->do_post_task_switch_extension = TRUE;
if ( the_thread->current_state & STATES_INTERRUPTIBLE_BY_SIGNAL ) {
the_thread->Wait.return_code = EINTR;
if ( _States_Is_waiting_on_thread_queue(the_thread->current_state) )
_Thread_queue_Extract_with_proxy( the_thread );
else if ( _States_Is_delaying(the_thread->current_state)){
if ( _Watchdog_Is_active( &the_thread->Timer ) )
(void) _Watchdog_Remove( &the_thread->Timer );
_Thread_Unblock( the_thread );
}
}
}
return FALSE;
}
bool _POSIX_signals_Unblock_thread(
Thread_Control *the_thread,
int signo,
siginfo_t *info
)
{
POSIX_API_Control *api;
sigset_t mask;
siginfo_t *the_info = NULL;
api = the_thread->API_Extensions[ THREAD_API_POSIX ];
mask = signo_to_mask( signo );
/*
* Is the thread is specifically waiting for a signal?
*/
if ( _States_Is_interruptible_signal( the_thread->current_state ) ) {
if ( (the_thread->Wait.option & mask) || (api->signals_unblocked & mask) ) {
the_thread->Wait.return_code = STATUS_INTERRUPTED;
the_info = (siginfo_t *) the_thread->Wait.return_argument;
if ( !info ) {
the_info->si_signo = signo;
the_info->si_code = SI_USER;
the_info->si_value.sival_int = 0;
} else {
*the_info = *info;
}
_Thread_queue_Extract_with_proxy( the_thread );
return _POSIX_signals_Unblock_thread_done( the_thread, api, true );
}
/*
* This should only be reached via pthread_kill().
*/
return _POSIX_signals_Unblock_thread_done( the_thread, api, false );
}
/*
* Thread is not waiting due to a sigwait.
*/
if ( api->signals_unblocked & mask ) {
/*
* The thread is interested in this signal. We are going
* to post it. We have a few broad cases:
* + If it is blocked on an interruptible signal, THEN
* we unblock the thread.
* + If it is in the ready state AND
* we are sending from an ISR AND
* it is the interrupted thread AND
* it is not blocked, THEN
* we need to dispatch at the end of this ISR.
* + Any other combination, do nothing.
*/
if ( _States_Is_interruptible_by_signal( the_thread->current_state ) ) {
the_thread->Wait.return_code = STATUS_INTERRUPTED;
_Thread_queue_Extract_with_proxy( the_thread );
}
}
return _POSIX_signals_Unblock_thread_done( the_thread, api, false );
}