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package polly
This module provides an interface to the eventfd(2) system call
create initval flags creates an evenfd with the given initial value and flags. See man evenfd(2).
val close : t -> unitval cloexec : flagsclose on exec
val nonblock : flagsnon blocking
val semaphore : flagssemaphore semantics, see man eventfd(2)
val empty : flagsno flags
test x y returns true, if and only if the intersection of the * two sets is not empty. The common case is test set x where set * is unknown and x is a singleton to check that x is contained in * set.
val to_string : flags -> stringto_string flags return a string representation of flags for debugging
val read : t -> int64Read the vaue of the eventfd. Block if it is zero (or trigger EAGAIN) and if non zero, reset to 0 if it is not a semaphore otherwise it decrements by 1.
val add : t -> int64 -> unitAdd the given value in the eventfd