FD_ISSET

FD_ISSET :: (fd: s32, set: *fd_set) -> s32

Returns 1 when descriptor fd is in set and 0 when it is not. A null set, a negative descriptor and one past the set's capacity (usually 1024) count as not in the set. After select returns, use it to ask which descriptors are ready.

Parameters

fd: s32

set: *fd_set

Returns

s32

set: fd_set;

FD_SET(7, *set);
assert(FD_ISSET(7, *set) == 1);
assert(FD_ISSET(8, *set) == 0);
assert(FD_ISSET(100000, *set) == 0);