/*!
* Send signal to thread (from thread)
* \param pid Thread descriptor (user level descriptor)
* \param signo Signal number
* \param sigval Parameter to send with signal
* \return 0 if successful, -1 otherwise and appropriate error number is set
*/
int sys__sigqueue ( void *p )
{
pid_t pid;
int signo;
sigval_t sigval;
pthread_t thread, sender;
kthread_t *kthread;
siginfo_t sig;
pid = *( (pid_t *) p ); p += sizeof (pid_t);
signo = *( (int *) p ); p += sizeof (int);
sigval = *( (sigval_t *) p );
ASSERT_ERRNO_AND_EXIT ( signo > 0 && signo <= SIGMAX, EINVAL );
thread = (pthread_t) pid; /* pid_t should be pthread_t */
ASSERT_ERRNO_AND_EXIT ( thread.ptr, EINVAL );
kthread = thread.ptr;
ASSERT_ERRNO_AND_EXIT ( kthread_get_id (kthread) == thread.id, EINVAL );
ASSERT_ERRNO_AND_EXIT ( kthread_check_kthread ( kthread ), EINVAL );
sender.id = kthread_get_id (NULL);
sender.ptr = kthread_get_active ();
sig.si_signo = signo;
sig.si_value = sigval;
sig.si_pid = sender;
sig.si_code = SI_USER;
sig.si_errno = 0;
EXIT ( ksignal_queue ( kthread, &sig ) );
}
/*!
* Change scheduling parameters
* \param thread User level thread descriptor
* \param policy Thread scheduling policy
* \param param Additional scheduling parameters (when policy != SCHED_FIFO)
* \return 0
*/
int sys__pthread_setschedparam ( void *p )
{
pthread_t *thread;
int policy;
sched_param_t *param;
kthread_t *kthread;
thread = *( (pthread_t **) p ); p += sizeof (pthread_t *);
policy = *( (int *) p ); p += sizeof (int);
param = *( (sched_param_t **) p );
kthread = thread->ptr;
ASSERT_ERRNO_AND_EXIT ( kthread, EINVAL );
ASSERT_ERRNO_AND_EXIT ( kthread_get_id (kthread) == thread->id, ESRCH );
ASSERT_ERRNO_AND_EXIT ( kthread_is_alive (kthread), ESRCH );
ASSERT_ERRNO_AND_EXIT ( policy >= 0 && policy < SCHED_NUM, EINVAL );
if ( param )
{
ASSERT_ERRNO_AND_EXIT (
param->sched_priority >= THREAD_MIN_PRIO &&
param->sched_priority <= THREAD_MAX_PRIO, EINVAL );
}
return kthread_setschedparam ( kthread, policy, param );
}
/*!
* Change scheduling parameters
* \param thread User level thread descriptor
* \param policy Thread scheduling policy
* \param param Additional scheduling parameters (when policy != SCHED_FIFO)
* \return 0
*/
int sys__pthread_setschedparam ( pthread_t *thread, int policy,
sched_param_t *param )
{
kthread_t *kthread;
int retval;
SYS_ENTRY();
kthread = thread->ptr;
ASSERT_ERRNO_AND_EXIT ( kthread, EINVAL );
ASSERT_ERRNO_AND_EXIT ( kthread_get_id (kthread) == thread->id, ESRCH );
ASSERT_ERRNO_AND_EXIT ( kthread_is_alive (kthread), ESRCH );
ASSERT_ERRNO_AND_EXIT ( policy == SCHED_FIFO, ENOTSUP );
if ( param )
{
ASSERT_ERRNO_AND_EXIT (
param->sched_priority >= THREAD_MIN_PRIO &&
param->sched_priority <= THREAD_MAX_PRIO, EINVAL );
}
retval = kthread_setschedparam ( kthread, policy, param );
if ( retval == EXIT_SUCCESS )
SYS_EXIT ( EXIT_SUCCESS, retval );
else
SYS_EXIT ( retval, EXIT_FAILURE );
}
/*!
* Create new thread (params on user stack!)
* \param thread User level thread descriptor
* \param attr Thread attributes
* \param start_routine Starting function for new thread
* \param arg Parameter sent to starting function
* (parameters are on calling thread stack)
*/
int sys__pthread_create ( void *p )
{
pthread_t *thread;
pthread_attr_t *attr;
void *(*start_routine) (void *);
void *arg;
kthread_t *kthread;
uint flags = 0;
int sched_policy = SCHED_FIFO;
int sched_priority = THREAD_DEF_PRIO;
void *stackaddr = NULL;
size_t stacksize = 0;
thread = *( (pthread_t **) p ); p += sizeof (pthread_t *);
attr = *( (pthread_attr_t **) p ); p += sizeof (pthread_attr_t *);
start_routine = *( (void **) p ); p += sizeof (void *);
arg = *( (void **) p );
if ( attr )
{
flags = attr->flags;
sched_policy = attr->sched_policy;
sched_priority = attr->sched_params.sched_priority;
stackaddr = attr->stackaddr;
stacksize = attr->stacksize;
ASSERT_ERRNO_AND_EXIT (
sched_policy >= 0 && sched_policy < SCHED_NUM,
ENOTSUP
);
ASSERT_ERRNO_AND_EXIT (
sched_priority >= THREAD_MIN_PRIO &&
sched_priority <= THREAD_MAX_PRIO,
ENOMEM
);
/* if ( flags & SOMETHING ) change attributes ... */
}
kthread = kthread_create ( start_routine, arg, flags,
sched_policy, sched_priority,
stackaddr, stacksize );
ASSERT_ERRNO_AND_EXIT ( kthread, ENOMEM );
if ( thread )
{
thread->ptr = kthread;
thread->id = kthread_get_id (kthread);
}
SET_ERRNO ( EXIT_SUCCESS );
kthreads_schedule ();
return EXIT_SUCCESS;
}
/*! Return calling thread descriptor
* \param thread Thread descriptor (user level descriptor)
* \return 0
*/
int sys__pthread_self ( pthread_t *thread )
{
SYS_ENTRY();
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
thread->ptr = kthread_get_active ();
thread->id = kthread_get_id (NULL);
SYS_EXIT ( EXIT_SUCCESS, EXIT_SUCCESS );
}
/*! Return calling thread descriptor
* \param thread Thread descriptor (user level descriptor)
* \return 0
*/
int sys__pthread_self ( void *p )
{
pthread_t *thread;
thread = *( (void **) p );
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
thread->ptr = kthread_get_active ();
thread->id = kthread_get_id (NULL);
EXIT ( EXIT_SUCCESS );
}
/*!
* Create new thread (params on user stack!)
* \param thread User level thread descriptor
* \param attr Thread attributes
* \param start_routine Starting function for new thread
* \param arg Parameter sent to starting function
* (parameters are on calling thread stack)
*/
int sys__pthread_create ( pthread_t *thread, pthread_attr_t *attr,
void *(*start_routine) (void *), void *arg )
{
kthread_t *kthread;
uint flags = 0;
int sched_policy = SCHED_FIFO;
int sched_priority = THREAD_DEF_PRIO;
void *stackaddr = NULL;
size_t stacksize = 0;
SYS_ENTRY();
if ( attr )
{
flags = attr->flags;
sched_policy = attr->sched_policy;
sched_priority = attr->sched_params.sched_priority;
stackaddr = attr->stackaddr;
stacksize = attr->stacksize;
ASSERT_ERRNO_AND_EXIT ( sched_policy == SCHED_FIFO,
ENOTSUP );
ASSERT_ERRNO_AND_EXIT (
sched_priority >= THREAD_MIN_PRIO &&
sched_priority <= THREAD_MAX_PRIO,
ENOMEM
);
/* if ( flags & SOMETHING ) change attributes ... */
}
kthread = kthread_create ( start_routine, arg, flags,
sched_policy, sched_priority,
stackaddr, stacksize );
ASSERT_ERRNO_AND_EXIT ( kthread, ENOMEM );
if ( thread )
{
thread->ptr = kthread;
thread->id = kthread_get_id (kthread);
}
kthreads_schedule ();
SYS_EXIT ( EXIT_SUCCESS, EXIT_SUCCESS );
}
/*!
* Wait for thread termination
* \param thread Thread descriptor (user level descriptor)
* \param retval Where to store exit status of joined thread
* \return 0 if thread already gone; -1 if not finished and 'wait' not set;
* 'thread exit status' otherwise
*/
int sys__pthread_join ( void *p )
{
pthread_t *thread;
void **retval;
kthread_t *kthread;
int ret_value = 0;
thread = *( (pthread_t **) p ); p += sizeof (pthread_t *);
retval = *( (void ***) p );
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
kthread = thread->ptr;
if ( kthread_get_id (kthread) != thread->id )
{
/* at 'kthread' is now something else */
ret_value = EXIT_FAILURE;
SET_ERRNO ( ESRCH );
}
else if ( kthread_is_alive (kthread) )
{
ret_value = EXIT_SUCCESS;
SET_ERRNO ( EXIT_SUCCESS );
kthread_set_private_param ( kthread_get_active(), retval );
kthread_wait_thread ( NULL, kthread );
kthreads_schedule ();
}
else {
/* target thread is passive, collect status and free descr. */
ret_value = EXIT_SUCCESS;
SET_ERRNO ( EXIT_SUCCESS );
kthread_collect_status ( kthread, retval );
}
return ret_value;
}
/*!
* Wait for thread termination
* \param thread Thread descriptor (user level descriptor)
* \param retval Where to store exit status of joined thread
* \return 0 if thread already gone; -1 if not finished and 'wait' not set;
* 'thread exit status' otherwise
*/
int sys__pthread_join ( pthread_t *thread, void **retval )
{
kthread_t *kthread;
SYS_ENTRY();
ASSERT_ERRNO_AND_EXIT ( thread, ESRCH );
kthread = thread->ptr;
if ( kthread_get_id (kthread) != thread->id )
{
/* at 'kthread' is now something else */
SYS_EXIT ( ESRCH, EXIT_FAILURE );
}
else if ( kthread_is_alive (kthread) )
{
kthread_set_errno ( NULL, EXIT_SUCCESS );
kthread_set_syscall_retval ( NULL, EXIT_SUCCESS );
kthread_set_private_param ( kthread_get_active(), retval );
kthread_wait_thread ( NULL, kthread );
kthreads_schedule ();
SYS_EXIT ( kthread_get_errno(NULL),
kthread_get_syscall_retval(NULL) );
}
else {
/* target thread is passive, collect status and free descr. */
kthread_collect_status ( kthread, retval );
SYS_EXIT ( EXIT_SUCCESS, EXIT_SUCCESS );
}
}
/*! Process event defined with sigevent_t */
int ksignal_process_event ( sigevent_t *evp, kthread_t *kthread, int code )
{
int retval = EXIT_SUCCESS;
kthread_t *target = kthread;
siginfo_t sig;
pid_t pid;
void (*func) ( sigval_t );
ASSERT ( evp && kthread );
switch ( evp->sigev_notify )
{
case SIGEV_WAKE_THREAD:
func = evp->sigev_notify_function;
func ( evp->sigev_value );
break;
case SIGEV_NONE:
break;
case SIGEV_THREAD_ID:
pid = evp->sigev_notify_thread_id;
target = pid.ptr;
if ( !target || !kthread_is_alive (target) ||
pid.id != kthread_get_id (target) )
return ESRCH;
case SIGEV_SIGNAL:
sig.si_signo = evp->sigev_signo;
sig.si_value = evp->sigev_value;
sig.si_code = code;
sig.si_errno = 0;
sig.si_pid.id = kthread_get_id ( kthread );
sig.si_pid.ptr = kthread;
retval = ksignal_queue ( target, &sig );
break;
case SIGEV_THREAD:
if ( evp->sigev_notify_function )
{
if ( !kthread_create ( evp->sigev_notify_function,
evp->sigev_value.sival_ptr, 0,
SCHED_FIFO, THREAD_DEF_PRIO,
NULL, 0,
kthread_get_process(kthread) ) )
retval = EINVAL;
}
else {
retval = EINVAL;
}
break;
default:
retval = EINVAL;
break;
}
return retval;
}
