(* Title: Pure/PIDE/document.ML
Author: Makarius
Document as collection of named nodes, each consisting of an editable
list of commands, associated with asynchronous execution process.
*)
signature DOCUMENT =
sig
type id = int
type version_id = id
type command_id = id
type exec_id = id
val no_id: id
val new_id: unit -> id
val parse_id: string -> id
val print_id: id -> string
type node_header = (string * string list * (string * bool) list) Exn.result
datatype node_edit =
Clear |
Edits of (command_id option * command_id option) list |
Header of node_header
type edit = string * node_edit
type state
val init_state: state
val join_commands: state -> unit
val cancel_execution: state -> Future.task list
val define_command: command_id -> string -> state -> state
val edit: version_id -> version_id -> edit list -> state -> (command_id * exec_id) list * state
val execute: version_id -> state -> state
val state: unit -> state
val change_state: (state -> state) -> unit
end;
structure Document: DOCUMENT =
struct
(* unique identifiers *)
type id = int;
type version_id = id;
type command_id = id;
type exec_id = id;
val no_id = 0;
val new_id = Synchronized.counter ();
val parse_id = Markup.parse_int;
val print_id = Markup.print_int;
fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ print_id id);
fun err_undef kind id = error ("Undefined " ^ kind ^ ": " ^ print_id id);
(** document structure **)
type node_header = (string * string list * (string * bool) list) Exn.result;
structure Entries = Linear_Set(type key = command_id val ord = int_ord);
abstype node = Node of
{header: node_header,
entries: exec_id option Entries.T, (*command entries with excecutions*)
result: Toplevel.state lazy}
and version = Version of node Graph.T (*development graph wrt. static imports*)
with
fun make_node (header, entries, result) =
Node {header = header, entries = entries, result = result};
fun map_node f (Node {header, entries, result}) =
make_node (f (header, entries, result));
fun get_header (Node {header, ...}) = header;
fun set_header header = map_node (fn (_, entries, result) => (header, entries, result));
fun map_entries f (Node {header, entries, result}) = make_node (header, f entries, result);
fun fold_entries start f (Node {entries, ...}) = Entries.fold start f entries;
fun first_entry start P (Node {entries, ...}) = Entries.get_first start P entries;
fun get_theory pos (Node {result, ...}) = Toplevel.end_theory pos (Lazy.get_finished result);
fun set_result result = map_node (fn (header, entries, _) => (header, entries, result));
val empty_exec = Lazy.value Toplevel.toplevel;
val empty_node = make_node (Exn.Exn (ERROR "Bad theory header"), Entries.empty, empty_exec);
val clear_node = map_node (fn (header, _, _) => (header, Entries.empty, empty_exec));
fun get_node nodes name = Graph.get_node nodes name handle Graph.UNDEF _ => empty_node;
fun default_node name = Graph.default_node (name, empty_node);
fun update_node name f = default_node name #> Graph.map_node name f;
(* node edits and associated executions *)
datatype node_edit =
Clear |
Edits of (command_id option * command_id option) list |
Header of node_header;
type edit = string * node_edit;
fun the_entry (Node {entries, ...}) id =
(case Entries.lookup entries id of
NONE => err_undef "command entry" id
| SOME entry => entry);
fun update_entry (id, exec_id) =
map_entries (Entries.update (id, SOME exec_id));
fun reset_after id entries =
(case Entries.get_after entries id of
NONE => entries
| SOME next => Entries.update (next, NONE) entries);
val edit_node = map_entries o fold
(fn (id, SOME id2) => Entries.insert_after id (id2, NONE)
| (id, NONE) => Entries.delete_after id #> reset_after id);
(* version operations *)
val empty_version = Version Graph.empty;
fun nodes_of (Version nodes) = nodes;
val node_of = get_node o nodes_of;
fun cycle_msg names = "Cyclic dependency of " ^ space_implode " via " (map quote names);
fun touch_descendants name nodes =
fold (fn desc => desc <> name ? update_node desc (map_entries (reset_after NONE)))
(Graph.all_succs nodes [name]) nodes;
fun edit_nodes (name, node_edit) (Version nodes) =
Version
(touch_descendants name
(case node_edit of
Clear => update_node name clear_node nodes
| Edits edits =>
nodes
|> update_node name (edit_node edits)
| Header header =>
let
val parents = (case header of Exn.Res (_, parents, _) => parents | _ => []);
val nodes1 = nodes
|> default_node name
|> fold default_node parents;
val nodes2 = nodes1
|> fold (fn dep => Graph.del_edge (dep, name)) (Graph.imm_preds nodes1 name);
val (header', nodes3) =
(header, Graph.add_deps_acyclic (name, parents) nodes2)
handle Graph.CYCLES cs => (Exn.Exn (ERROR (cat_lines (map cycle_msg cs))), nodes2);
in Graph.map_node name (set_header header') nodes3 end));
fun put_node (name, node) (Version nodes) =
Version (update_node name (K node) nodes);
end;
(** global state -- document structure and execution process **)
abstype state = State of
{versions: version Inttab.table, (*version_id -> document content*)
commands: Toplevel.transition future Inttab.table, (*command_id -> transition (future parsing)*)
execs: Toplevel.state lazy Inttab.table, (*exec_id -> execution process*)
execution: Future.group} (*global execution process*)
with
fun make_state (versions, commands, execs, execution) =
State {versions = versions, commands = commands, execs = execs, execution = execution};
fun map_state f (State {versions, commands, execs, execution}) =
make_state (f (versions, commands, execs, execution));
val init_state =
make_state (Inttab.make [(no_id, empty_version)],
Inttab.make [(no_id, Future.value Toplevel.empty)],
Inttab.make [(no_id, empty_exec)],
Future.new_group NONE);
(* document versions *)
fun define_version (id: version_id) version =
map_state (fn (versions, commands, execs, execution) =>
let val versions' = Inttab.update_new (id, version) versions
handle Inttab.DUP dup => err_dup "document version" dup
in (versions', commands, execs, execution) end);
fun the_version (State {versions, ...}) (id: version_id) =
(case Inttab.lookup versions id of
NONE => err_undef "document version" id
| SOME version => version);
(* commands *)
fun define_command (id: command_id) text =
map_state (fn (versions, commands, execs, execution) =>
let
val id_string = print_id id;
val tr =
Future.fork_pri 2 (fn () =>
Position.setmp_thread_data (Position.id_only id_string)
(fn () => Outer_Syntax.prepare_command (Position.id id_string) text) ());
val commands' =
Inttab.update_new (id, tr) commands
handle Inttab.DUP dup => err_dup "command" dup;
in (versions, commands', execs, execution) end);
fun the_command (State {commands, ...}) (id: command_id) =
(case Inttab.lookup commands id of
NONE => err_undef "command" id
| SOME tr => tr);
fun join_commands (State {commands, ...}) =
Inttab.fold (fn (_, tr) => fn () => ignore (Future.join_result tr)) commands ();
(* command executions *)
fun define_exec (exec_id, exec) =
map_state (fn (versions, commands, execs, execution) =>
let val execs' = Inttab.update_new (exec_id, exec) execs
handle Inttab.DUP dup => err_dup "command execution" dup
in (versions, commands, execs', execution) end);
fun the_exec (State {execs, ...}) exec_id =
(case Inttab.lookup execs exec_id of
NONE => err_undef "command execution" exec_id
| SOME exec => exec);
(* document execution *)
fun cancel_execution (State {execution, ...}) = Future.cancel_group execution;
end;
(* toplevel transactions *)
local
fun timing tr t = Toplevel.status tr (Markup.timing t);
fun proof_status tr st =
(case try Toplevel.proof_of st of
SOME prf => Toplevel.status tr (Proof.status_markup prf)
| NONE => ());
fun async_state tr st =
(singleton o Future.forks)
{name = "Document.async_state", group = SOME (Future.new_group NONE),
deps = [], pri = 0, interrupts = true}
(fn () =>
Toplevel.setmp_thread_position tr
(fn () => Toplevel.print_state false st) ())
|> ignore;
fun run int tr st =
(case Toplevel.transition int tr st of
SOME (st', NONE) => ([], SOME st')
| SOME (_, SOME (exn, _)) =>
(case ML_Compiler.exn_messages exn of
[] => Exn.interrupt ()
| errs => (errs, NONE))
| NONE => ([(serial (), ML_Compiler.exn_message Runtime.TERMINATE)], NONE));
in
fun run_command tr st =
let
val is_init = Toplevel.is_init tr;
val is_proof = Keyword.is_proof (Toplevel.name_of tr);
val do_print = not is_init andalso (Toplevel.print_of tr orelse is_proof);
val start = Timing.start ();
val (errs, result) =
if Toplevel.is_toplevel st andalso not is_init then ([], SOME st)
else run (is_init orelse is_proof) (Toplevel.set_print false tr) st;
val _ = timing tr (Timing.result start);
val _ = List.app (Toplevel.error_msg tr) errs;
in
(case result of
NONE => (Toplevel.status tr Markup.failed; st)
| SOME st' =>
(Toplevel.status tr Markup.finished;
proof_status tr st';
if do_print then async_state tr st' else ();
st'))
end;
end;
(** editing **)
(* edit *)
local
fun is_changed node' ((_, id), exec) =
(case try (the_entry node') id of
NONE => true
| SOME exec' => exec' <> exec);
fun new_exec (command_id, command) (assigns, execs, exec) =
let
val exec_id' = new_id ();
val exec' =
Lazy.lazy (fn () =>
let
val tr = Toplevel.put_id (print_id exec_id') (Future.get_finished command);
val st = Lazy.get_finished exec;
in run_command tr st end);
in ((command_id, exec_id') :: assigns, (exec_id', exec') :: execs, exec') end;
in
fun edit (old_id: version_id) (new_id: version_id) edits state =
let
val old_version = the_version state old_id;
val _ = Time.now (); (* FIXME odd workaround for polyml-5.4.0/x86_64 *)
val new_version = fold edit_nodes edits old_version;
val updates =
nodes_of new_version |> Graph.schedule
(fn deps => fn (name, node) =>
(case first_entry NONE (is_changed (node_of old_version name)) node of
NONE => Future.value (([], [], []), node)
| SOME ((prev, id), _) =>
let
fun init () =
let
val (thy_name, imports, uses) = Exn.release (get_header node);
(* FIXME provide files via Scala layer *)
val (dir, files) =
if ML_System.platform_is_cygwin then (Path.current, [])
else (Path.dir (Path.explode name), map (apfst Path.explode) uses);
val parents =
imports |> map (fn import =>
(case Thy_Info.lookup_theory import of
SOME thy => thy
| NONE =>
get_theory (Position.file_only import)
(#2 (Future.join (the (AList.lookup (op =) deps import))))));
in Thy_Load.begin_theory dir thy_name imports files parents end
fun get_command id =
(id, the_command state id |> Future.map (Toplevel.modify_init init));
in
(singleton o Future.forks)
{name = "Document.edit", group = NONE,
deps = map (Future.task_of o #2) deps, pri = 2, interrupts = false}
(fn () =>
let
val prev_exec =
(case prev of
NONE => no_id
| SOME prev_id => the_default no_id (the_entry node prev_id));
val (assigns, execs, result) =
fold_entries (SOME id) (new_exec o get_command o #2 o #1)
node ([], [], the_exec state prev_exec);
val node' = node
|> fold update_entry assigns
|> set_result result;
in ((assigns, execs, [(name, node')]), node') end)
end))
|> Future.join_results |> Par_Exn.release_all |> map #1;
val state' = state
|> fold (fold define_exec o #2) updates
|> define_version new_id (fold (fold put_node o #3) updates new_version);
in (maps #1 (rev updates), state') end;
end;
(* execute *)
fun execute version_id state =
state |> map_state (fn (versions, commands, execs, _) =>
let
val version = the_version state version_id;
fun force_exec NONE = ()
| force_exec (SOME exec_id) = ignore (Lazy.force (the_exec state exec_id));
val execution = Future.new_group NONE;
val _ =
nodes_of version |> Graph.schedule
(fn deps => fn (name, node) =>
(singleton o Future.forks)
{name = "theory:" ^ name, group = SOME (Future.new_group (SOME execution)),
deps = map (Future.task_of o #2) deps, pri = 1, interrupts = true}
(fold_entries NONE (fn (_, exec) => fn () => force_exec exec) node));
in (versions, commands, execs, execution) end);
(** global state **)
val global_state = Synchronized.var "Document" init_state;
fun state () = Synchronized.value global_state;
val change_state = Synchronized.change global_state;
end;