Module Async_unix__Log.Output

create f returns a t, given a function that actually performs the final output work. It is the responsibility of the write function to contain all state, and to clean up after itself when it is garbage collected (which may require a finalizer). The function should avoid modifying the contents of the queue; it's reused for each Output.t.

The "stock" output modules support a sexp and bin_prot output format, and other output modules should make efforts to support them as well where it is meaningful/appropriate to do so.

The unit Deferred returned by the function should not be fulfilled until the all of the messages in the given queue are completely handled (e.g. written to disk).

An optional rotate function may be given which will be called when Log.rotate t is called while this output is in effect. This is useful for programs that want very precise control over rotation.

If close is provided it will be called when the log falls out of scope. (Note that it is not called directly even if you close a log which is using this output, because outputs are sometimes reused.)

returns a tail of the filenames. When rotate is called, the previous filename is put on the tail