static void docancel(struct pthread *self)
{
struct __ptcb cb = { .__next = self->cancelbuf };
+ sigset_t set;
+ self->canceldisable = 1;
+ self->cancelasync = 0;
+ sigemptyset(&set);
+ sigaddset(&set, SIGCANCEL);
+ __libc_sigprocmask(SIG_UNBLOCK, &set, 0);
__pthread_unwind_next(&cb);
}
struct pthread *self = __pthread_self();
if (si->si_code > 0 || si->si_pid != self->pid) return;
self->cancel = 1;
- if (self->canceldisable || (!self->cancelasync && !self->cancelpoint))
- return;
- docancel(self);
+ if (self->canceldisable) return;
+ if (self->cancelasync || (self->cancelpoint==1 && PC_AT_SYS(ctx)))
+ docancel(self);
}
static void cancelpt(int x)
{
struct pthread *self = __pthread_self();
if (self->canceldisable) return;
- self->cancelpoint = x;
- if (self->cancel) docancel(self);
+ if ((self->cancelpoint+=x)==1 && x>=0 && self->cancel)
+ docancel(self);
}
/* "rsyscall" is a mechanism by which a thread can synchronously force all