package b0

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Guards

package b0

b0
- B0_build
- B0_cli
  - Arg
- B0_cmdlet
  - Env
  - Map
  - Set
- B0_def
  - Make
    
    Map
    
    Set
    
    V
  - S
    
    Map
    
    Set
  - Scope
  - VALUE
- B0_dir
- B0_driver
  - Cli
  - Compile
  - Conf
  - Env
  - Exit
- B0_file
- B0_meta
  - Key
- B0_pack
  - Map
  - Set
- B0_unit
  - Action
  - Map
  - Set
b0.b0
- B0_b0
  - Cli
  - Def
- B0_cmd_build
- B0_cmd_cmd
- B0_cmd_cmdlet
- B0_cmd_delete
- B0_cmd_file
- B0_cmd_log
- B0_cmd_pack
- B0_cmd_root
- B0_cmd_scope
- B0_cmd_unit
- B0_main
b0.b00
- B00
  - Env
  - Memo
  - Store
  - Tool
- B000
  - Exec
  - File_cache
  - Guard
  - Op
    
    Copy
    
    Delete
    
    Map
    
    Mkdir
    
    Notify
    
    Read
    
    Set
    
    Spawn
    
    Wait_files
    
    Write
  - Reviver
  - Trash
- B000_conv
  - Op
b0.b00.kit
- B00_base64
- B00_cli
  - Arg
  - B00_std
  - Exit
  - File_cache
  - Memo
    
    Log
  - Op
- B00_cmark
- B00_editor
  - Env
- B00_fexts
- B00_findex
- B00_github
  - Auth
  - Issue
  - Pages
  - Release
  - Repo
- B00_htmlg
  - At
    
    Name
  - El
- B00_http
  - Http
  - Httpr
  - Uri
- B00_jsoo
- B00_lines
- B00_ocaml
  - Archive
  - Cobj
    
    Map
    
    Set
  - Compile
  - Conf
  - Crunch
  - Lib
    
    Name
    
    Map
    
    Set
    
    Resolver
  - Link
  - Mod
    
    Name
    
    Ref
    
    Map
    
    Set
    
    Src
    
    Deps
  - Ocamlpath
  - Tool
- B00_odoc
  - Compile
    
    Dep
    
    Writes
  - Html
    
    Dep
    
    Writes
  - Html_fragment
  - Support_files
    
    Writes
  - Theme
- B00_os
- B00_pager
  - Env
- B00_pdf_viewer
  - Env
- B00_rsync
- B00_serialk_json
  - Json
  - Jsong
  - Jsonq
- B00_serialk_sexp
  - Sexp
  - Sexpg
  - Sexpq
- B00_serialk_text
  - Tdec
  - Tloc
- B00_trace
  - Compilation_database
  - Trace_event
- B00_vcs
  - Git
  - Hg
- B00_www_browser
  - Env
b0.b00.std
- B00_std
  - Bincode
  - Char
    
    Ascii
  - Cmd
  - Fmt
  - Fpath
    
    Map
    
    Set
  - Fut
    
    Syntax
  - Hash
    
    Murmur3_128
    
    T
    
    Xxh_64
  - List
  - Log
  - Mtime
    
    Span
  - Os
    
    Cmd
    
    Cpu
    
    Time
    
    Dir
    
    Env
    
    Exit
    
    Fd
    
    File
    
    Mtime
    
    Path
  - Result
    
    Syntax
  - Rqueue
  - String
    
    Ascii
    
    Map
    
    Set
  - Tid
  - Tty
b0.kit
- B0_jsoo
- B0_kit
  - V000
- B0_ocaml
  - Meta
- B0_ocaml_eco
- B0_opam
  - Cmdlet
  - File
  - Meta
- B0_release
  - Cmdlet
  - Meta
- B0_srcs

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Build operation guards.

A guard ensure that a build operation is allowed to proceed. This means either that:

It is ready and can be submitted for execution. This happens once all the files the operation reads are ready: they exist and are up-to-date.
It is aborted. This happens if a file it needs to read never becomes ready.

Note. This module does not access the file system it trusts clients that call Guard.set_file_ready not to lie about its existence on the file system.

Guards

type t

The type for build operations guards.

val create : unit -> t

create () is a new guard.

val set_file_ready : t -> B00_std.Fpath.t -> unit

set_file_ready g f indicates to g that file f is ready, i.e. that it exists and is up-to-date.

val set_file_never : t -> B00_std.Fpath.t -> unit

set_file_never g f indicate to g that file f will never become ready.

val add : t -> Op.t -> unit

add g o guards o in g until it is allowed.

val allowed : t -> Op.t option

allowed g is an operation that is either ready or aborted in g (if any). In the second case the Op.status is Op.status.Aborted.