Synchronously wait for queued signals specified in uthese
long sys_rt_sigtimedwait(const sigset_t __user * uthese, siginfo_t __user * uinfo, const struct timespec __user * uts, size_t sigsetsize);
uthese
queued signals to wait for
uinfo
if non-null, the signal's siginfo is returned here
uts
upper bound on process time suspension
sigsetsize
size of sigset_t type