struct hurd_sigstate *
_hurd_thread_sigstate (thread_t thread)
{
struct hurd_sigstate *ss;
__mutex_lock (&_hurd_siglock);
for (ss = _hurd_sigstates; ss != NULL; ss = ss->next)
if (ss->thread == thread)
break;
if (ss == NULL)
{
ss = malloc (sizeof (*ss));
if (ss == NULL)
__libc_fatal ("hurd: Can't allocate sigstate\n");
ss->thread = thread;
__spin_lock_init (&ss->lock);
/* Initialize default state. */
__sigemptyset (&ss->blocked);
__sigemptyset (&ss->pending);
memset (&ss->sigaltstack, 0, sizeof (ss->sigaltstack));
ss->preemptors = NULL;
ss->suspended = MACH_PORT_NULL;
ss->intr_port = MACH_PORT_NULL;
ss->context = NULL;
if (thread == MACH_PORT_NULL)
{
/* Process-wide sigstate, use the system defaults. */
default_sigaction (ss->actions);
/* The global sigstate is not added to the _hurd_sigstates list.
It is created with _hurd_thread_sigstate (MACH_PORT_NULL)
but should be accessed through _hurd_global_sigstate. */
}
else
{
/* Use the global actions as a default for new threads. */
struct hurd_sigstate *s = _hurd_global_sigstate;
if (s)
{
__spin_lock (&s->lock);
memcpy (ss->actions, s->actions, sizeof (s->actions));
__spin_unlock (&s->lock);
}
else
default_sigaction (ss->actions);
ss->next = _hurd_sigstates;
_hurd_sigstates = ss;
}
}
__mutex_unlock (&_hurd_siglock);
return ss;
}
struct hurd_sigstate *
_hurd_thread_sigstate (thread_t thread)
{
struct hurd_sigstate *ss;
__mutex_lock (&_hurd_siglock);
for (ss = _hurd_sigstates; ss != NULL; ss = ss->next)
if (ss->thread == thread)
break;
if (ss == NULL)
{
ss = malloc (sizeof (*ss));
if (ss == NULL)
__libc_fatal ("hurd: Can't allocate thread sigstate\n");
ss->thread = thread;
__spin_lock_init (&ss->lock);
/* Initialize default state. */
__sigemptyset (&ss->blocked);
__sigemptyset (&ss->pending);
memset (&ss->sigaltstack, 0, sizeof (ss->sigaltstack));
ss->sigaltstack.ss_flags |= SS_DISABLE;
ss->preemptors = NULL;
ss->suspended = MACH_PORT_NULL;
ss->intr_port = MACH_PORT_NULL;
ss->context = NULL;
/* Initialize the sigaction vector from the default signal receiving
thread's state, and its from the system defaults. */
if (thread == _hurd_sigthread)
default_sigaction (ss->actions);
else
{
struct hurd_sigstate *s;
for (s = _hurd_sigstates; s != NULL; s = s->next)
if (s->thread == _hurd_sigthread)
break;
if (s)
{
__spin_lock (&s->lock);
memcpy (ss->actions, s->actions, sizeof (s->actions));
__spin_unlock (&s->lock);
}
else
default_sigaction (ss->actions);
}
ss->next = _hurd_sigstates;
_hurd_sigstates = ss;
}
__mutex_unlock (&_hurd_siglock);
return ss;
}