package qcow

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in-package search v0.2.0

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Exclusive write locks

val with_lock : 
  ?client:Client.t ->
  t ->
  Qcow_types.Cluster.t ->
  (unit -> 'a Lwt.t) ->
  'a Lwt.t

with_lock t f executes f () with the lock held for writing

val with_locks : 
  ?client:Client.t ->
  t ->
  first:Qcow_types.Cluster.t ->
  last:Qcow_types.Cluster.t ->
  (unit -> 'a Lwt.t) ->
  'a Lwt.t

with_locks t ~first ~last f executes f () with all clusters in the interval first .. last inclusive locked for writing.

val try_lock : ?client:Client.t -> t -> Qcow_types.Cluster.t -> lock option

try_lock ?client t cluster returns a write lock on cluster if it can be done without blocking, or returns None.