eventfd_signal - Adds n to the eventfd counter.
2. SYNOPSIS ▲
__u64 eventfd_signal(struct eventfd_ctx * ctx , __u64 n );
3. ARGUMENTS ▲
[in] Pointer to the eventfd context.
[in] Value of the counter to be added to the eventfd internal counter. The value cannot be negative.
4. DESCRIPTION ▲
This function is supposed to be called by the kernel in paths that do not allow sleeping. In this function we allow the counter to reach the ULLONG_MAX value, and we signal this as overflow condition by returining a POLLERR to poll(2).
Returns the amount by which the counter was incrememnted. This will be less than n if the counter has overflowed.
5. COPYRIGHT ▲