package async

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package async
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Lock_file_async is a wrapper that provides Async equivalents for Lock_file_blocking.

val create : ?message:string -> ?close_on_exec:bool -> ?unlink_on_exit:bool -> string -> bool Async.Deferred.t

create ?message path tries to create a file at path containing the text message, pid if none provided. It returns true on success, false on failure. Note: there is no way to release the lock or the fd created inside! It will only be released when the process dies.

val create_exn : ?message:string -> ?close_on_exec:bool -> ?unlink_on_exit:bool -> string -> unit Async.Deferred.t

create_exn ?message path is like create except that it throws an exception on failure instead of returning a boolean value.

val waiting_create : ?abort:unit Async.Deferred.t -> ?message:string -> ?close_on_exec:bool -> ?unlink_on_exit:bool -> string -> unit Async.Deferred.t

waiting_create path repeatedly tries to lock path, becoming determined when path is locked or raising when abort becomes determined. Similar to Lock_file_blocking.create.

val is_locked : string -> bool Async.Deferred.t

is_locked path returns true when the file at path exists and is locked, false otherwise.

module Nfs : sig ... end

Nfs has analogs of functions in Lock_file_blocking.Nfs; see there for documentation. In addition to adding Deferred's, blocking_create was renamed waiting_create to avoid the impression that it blocks Async.

module Flock : sig ... end