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vmmd_console: reuse ring if already present in map - this preserves console output between re-creations

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This commit is contained in:
Hannes Mehnert 2019-01-27 12:55:23 +01:00
parent 943ea45e25
commit d9f76312ed
1 changed files with 9 additions and 6 deletions
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15
app/vmmd_console.ml
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@ -69,15 +69,18 @@ let t = ref String.Map.empty
let add_fifo id = let add_fifo id =
let name = Vmm_core.Name.to_string id in let name = Vmm_core.Name.to_string id in
open_fifo id >|= function open_fifo id >|= function
| None -> Error (`Msg "opening")
| Some f -> | Some f ->
let ring = Vmm_ring.create "" () in let ring = match String.Map.find name !t with
Logs.debug (fun m -> m "inserting fifo %s" name) ; | None ->
let map = String.Map.add name ring !t in let ring = Vmm_ring.create "" () in
t := map ; let map = String.Map.add name ring !t in
t := map ;
ring
| Some ring -> ring
in
Lwt.async (read_console id name ring f) ; Lwt.async (read_console id name ring f) ;
Ok () Ok ()
| None ->
Error (`Msg "opening")
let subscribe s id = let subscribe s id =
let name = Vmm_core.Name.to_string id in let name = Vmm_core.Name.to_string id in