Where to find eventfd_write documentation?

Question

Is there a detailed documentation for eventfd_write?

man eventfd_write brings up the manpage of eventfd. On that manpage, it mentions eventfd_write() is offered by glibc.

Google only indexed 6 pages of entire gnu's site for eventfd_write. None of them is related to the documentation.

Any idea where I can find it?

P.S. Another side question (but sort of related): is there a mailing list to ask non-distribution specific questions about glibc? I only see the point of contacts for distribution specific questions.

Answer 1

What kind of detailed documentation are you looking for? I asked Google for "eventfd", the first hit was a Linux man-pages website, and the online man page says

The GNU C library defines an additional type, and two functions that attempt to abstract some of the details of reading and writing on an eventfd file descriptor:

    typedef uint64_t eventfd_t;

    int eventfd_read(int fd, eventfd_t *value);
    int eventfd_write(int fd, eventfd_t value);

The functions perform the read and write operations on an eventfd file descriptor, returning 0 if the correct number of bytes was transferred, or -1 otherwise.

Basically, the eventfd_write() function takes a file descriptor (which must have been obtained via a call to eventfd()), and a 64-bit unsigned integer, writes the 64-bit unsigned integer to the file descriptor, and returns either 0 for success, or -1 for failure.

How is that not detailed enough?