| io_waituntil(3) | Library Functions Manual | io_waituntil(3) |
io_waituntil - wait for events
#include <libowfat/io.h>
void io_waituntil(tai6464 t);
io_waituntil(t) is like io_wait() but does not wait (noticeably) past time t.
Depending on the underlying operating system primitive, there is a potential race condition to be aware of. Some event notification mechanisms (for example, kqueue on BSD and epoll on Linux) will return multiple events. If your application operates on pairs of file descriptors (a proxy server maybe), and an error on one descriptor can lead to closing the other descriptor, then an outstanding event on the other descriptor can still be queued for delivery to you. Be prepared to receive events for a descriptor that has already been closed.
io_wait(3), io_check(3), io_wantread(3), io_wantwrite(3), io_fd(3)