diff options
Diffstat (limited to 'nptl/pthread_setcancelstate.c')
| -rw-r--r-- | nptl/pthread_setcancelstate.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/nptl/pthread_setcancelstate.c b/nptl/pthread_setcancelstate.c index 9905b12..f8edf18 100644 --- a/nptl/pthread_setcancelstate.c +++ b/nptl/pthread_setcancelstate.c @@ -30,9 +30,29 @@ __pthread_setcancelstate (int state, int *oldstate) self = THREAD_SELF; - if (oldstate != NULL) - *oldstate = self->cancelstate; - self->cancelstate = state; + int oldval = atomic_load_relaxed (&self->cancelhandling); + while (1) + { + int newval = (state == PTHREAD_CANCEL_DISABLE + ? oldval | CANCELSTATE_BITMASK + : oldval & ~CANCELSTATE_BITMASK); + + if (oldstate != NULL) + *oldstate = ((oldval & CANCELSTATE_BITMASK) + ? PTHREAD_CANCEL_DISABLE : PTHREAD_CANCEL_ENABLE); + + if (oldval == newval) + break; + + if (atomic_compare_exchange_weak_acquire (&self->cancelhandling, + &oldval, newval)) + { + if (cancel_enabled_and_canceled_and_async (newval)) + __do_cancel (); + + break; + } + } return 0; } |