int explain_eventfd_or_die(unsigned int initval, int flags);
int explain_eventfd_on_error(unsigned int initval, int flags);
DESCRIPTION
The explain_eventfd_or_die function is used to call the
eventfd(2) system call. On failure an explanation will be printed
to stderr, obtained from the explain_eventfd(3) function,
and then the process terminates by calling exit(EXIT_FAILURE).
The explain_eventfd_on_error function is used to call the
eventfd(2) system call. On failure an explanation will be printed
to stderr, obtained from the explain_eventfd(3) function,
but still returns to the caller.
initval
The initval, exactly as to be passed to the eventfd(2) system call.
flags
The flags, exactly as to be passed to the eventfd(2) system call.
RETURN VALUE
The explain_eventfd_or_die function only returns on success, see
eventfd(2) for more information. On failure, prints an explanation
and exits, it does not return.
The explain_eventfd_on_error function always returns the value
return by the wrapped eventfd(2) system call.
EXAMPLE
The explain_eventfd_or_die function is intended to be used in a
fashion similar to the following example:
int result = explain_eventfd_or_die(initval, flags);