- int r;
- struct timespec to;
- if (at) {
- clock_gettime(clk, &to);
- to.tv_sec = at->tv_sec - to.tv_sec;
- if ((to.tv_nsec = at->tv_nsec - to.tv_nsec) < 0) {
- to.tv_sec--;
- to.tv_nsec += 1000000000;
- }
- if (to.tv_sec < 0) return ETIMEDOUT;
+ int r, flag = 0;
+ struct timespec to, *top=0;
+
+ if (!at) goto notimeout;
+ if (at->tv_nsec >= 1000000000UL)
+ return EINVAL;
+ if (clk == CLOCK_REALTIME || clk == CLOCK_MONOTONIC) {
+ if (clk == CLOCK_REALTIME) flag = FUTEX_CLOCK_REALTIME;
+ if (cp) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT_BITSET|flag, val, at, 0, -1);
+ else r = -__syscall(SYS_futex, addr, FUTEX_WAIT_BITSET|flag, val, at, 0, -1);
+ if (r != ENOSYS) goto done;