Type Definition melib::backends::notmuch::bindings::notmuch_query_count_threads

type notmuch_query_count_threads = unsafe extern "C" fn(query: *mut notmuch_query_t, count: *mut c_uint) -> notmuch_status_t;

Return the number of threads matching a search.

This function performs a search and returns the number of unique thread IDs in the matching messages. This is the same as number of threads matching a search.

Note that this is a significantly heavier operation than notmuch_query_count_messages{_st}().

@returns

NOTMUCH_STATUS_OUT_OF_MEMORY: Memory allocation failed. The value of *count is not defined

NOTMUCH_STATUS_SUCCESS: query completed successfully.

NOTMUCH_STATUS_XAPIAN_EXCEPTION: a Xapian exception occurred. The value of *count is not defined.

@since libnotmuch 5 (notmuch 0.25)