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open Base
let await_readable fd : unit =
let trigger = Trigger.create () in
Perform_action_in_lwt.schedule
@@ Action.Wait_readable
( fd,
fun cancel ->
Trigger.signal trigger;
Lwt_engine.stop_event cancel );
Trigger.await_exn trigger
let rec read fd buf i len : int =
if len = 0 then
0
else (
match Unix.read fd buf i len with
| exception Unix.Unix_error ((Unix.EAGAIN | Unix.EWOULDBLOCK), _, _) ->
await_readable fd;
read fd buf i len
| n -> n
)
let await_writable fd =
let trigger = Trigger.create () in
Perform_action_in_lwt.schedule
@@ Action.Wait_writable
( fd,
fun cancel ->
Trigger.signal trigger;
Lwt_engine.stop_event cancel );
Trigger.await_exn trigger
let rec write_once fd buf i len : int =
if len = 0 then
0
else (
match Unix.write fd buf i len with
| exception Unix.Unix_error ((Unix.EAGAIN | Unix.EWOULDBLOCK), _, _) ->
await_writable fd;
write_once fd buf i len
| n -> n
)
let write fd buf i len : unit =
let i = ref i in
let len = ref len in
while !len > 0 do
let n = write_once fd buf !i !len in
i := !i + n;
len := !len - n
done
(** Sleep for the given amount of seconds *)
let sleep_s (f : float) : unit =
if f > 0. then (
let trigger = Trigger.create () in
Perform_action_in_lwt.schedule
@@ Action.Sleep
( f,
false,
fun cancel ->
Trigger.signal trigger;
Lwt_engine.stop_event cancel );
Trigger.await_exn trigger
)