author  wenzelm 
Thu, 01 Sep 2011 11:33:44 +0200  
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parent 44611  857c52a1c3f7 
child 44643  9987ae55e17b 
permissions  rwrr 
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(* Title: Pure/PIDE/document.ML 
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Author: Makarius 
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Document as collection of named nodes, each consisting of an editable 
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list of commands, with asynchronous read/eval/print processes. 
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*) 
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signature DOCUMENT = 
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sig 
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type id = int 
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type version_id = id 
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type command_id = id 
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type exec_id = id 
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val no_id: id 
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val new_id: unit > id 
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val parse_id: string > id 
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val print_id: id > string 
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type node_header = (string * string list * (string * bool) list) Exn.result 
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datatype node_edit = 
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Clear  
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Edits of (command_id option * command_id option) list  
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Header of node_header  
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Perspective of command_id list 
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type edit = string * node_edit 
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type state 
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val init_state: state 
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val define_command: command_id > string > state > state 
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val join_commands: state > state 
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val cancel_execution: state > Future.task list 
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val update_perspective: version_id > version_id > string > command_id list > state > state 
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val update: version_id > version_id > edit list > state > 
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((command_id * exec_id option) list * (string * command_id option) list) * state 
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val execute: version_id > state > state 
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val state: unit > state 
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val change_state: (state > state) > unit 
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end; 
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structure Document: DOCUMENT = 
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struct 
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(* unique identifiers *) 
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type id = int; 
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type version_id = id; 
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type command_id = id; 
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type exec_id = id; 
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val no_id = 0; 
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val new_id = Synchronized.counter (); 
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val parse_id = Markup.parse_int; 
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val print_id = Markup.print_int; 
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fun err_dup kind id = error ("Duplicate " ^ kind ^ ": " ^ print_id id); 
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fun err_undef kind id = error ("Undefined " ^ kind ^ ": " ^ print_id id); 
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(** document structure **) 
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type node_header = (string * string list * (string * bool) list) Exn.result; 
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type perspective = (command_id > bool) * command_id option; (*visible commands, last*) 
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structure Entries = Linear_Set(type key = command_id val ord = int_ord); 
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abstype node = Node of 
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{touched: bool, 
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header: node_header, 
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perspective: perspective, 
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entries: exec_id option Entries.T, (*command entries with excecutions*) 
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last_exec: command_id option, (*last command with exec state assignment*) 
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result: Toplevel.state lazy} 
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and version = Version of node Graph.T (*development graph wrt. static imports*) 
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with 
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fun make_node (touched, header, perspective, entries, last_exec, result) = 
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Node {touched = touched, header = header, perspective = perspective, 
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entries = entries, last_exec = last_exec, result = result}; 
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fun map_node f (Node {touched, header, perspective, entries, last_exec, result}) = 
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make_node (f (touched, header, perspective, entries, last_exec, result)); 
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fun make_perspective command_ids : perspective = 
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(Inttab.defined (Inttab.make (map (rpair ()) command_ids)), try List.last command_ids); 
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val no_header = Exn.Exn (ERROR "Bad theory header"); 
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val no_perspective = make_perspective []; 
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val no_print = Lazy.value (); 
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val no_result = Lazy.value Toplevel.toplevel; 
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val empty_node = make_node (false, no_header, no_perspective, Entries.empty, NONE, no_result); 
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val clear_node = map_node (fn (_, header, _, _, _, _) => 
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(false, header, no_perspective, Entries.empty, NONE, no_result)); 
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(* basic components *) 
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fun is_touched (Node {touched, ...}) = touched; 
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fun set_touched touched = 
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map_node (fn (_, header, perspective, entries, last_exec, result) => 
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(touched, header, perspective, entries, last_exec, result)); 
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fun get_header (Node {header, ...}) = header; 
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fun set_header header = 
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map_node (fn (touched, _, perspective, entries, last_exec, result) => 
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(touched, header, perspective, entries, last_exec, result)); 
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fun get_perspective (Node {perspective, ...}) = perspective; 
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fun set_perspective ids = 
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map_node (fn (touched, header, _, entries, last_exec, result) => 
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(touched, header, make_perspective ids, entries, last_exec, result)); 
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fun map_entries f = 
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map_node (fn (touched, header, perspective, entries, last_exec, result) => 
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(touched, header, perspective, f entries, last_exec, result)); 
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fun iterate_entries start f (Node {entries, ...}) = Entries.iterate start f entries; 
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fun get_last_exec (Node {last_exec, ...}) = last_exec; 
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fun set_last_exec last_exec = 
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map_node (fn (touched, header, perspective, entries, _, result) => 
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(touched, header, perspective, entries, last_exec, result)); 
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fun get_theory pos (Node {result, ...}) = Toplevel.end_theory pos (Lazy.force result); 
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fun set_result result = 
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map_node (fn (touched, header, perspective, entries, last_exec, _) => 
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(touched, header, perspective, entries, last_exec, result)); 
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fun get_node nodes name = Graph.get_node nodes name handle Graph.UNDEF _ => empty_node; 
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fun default_node name = Graph.default_node (name, empty_node); 
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fun update_node name f = default_node name #> Graph.map_node name f; 

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(* node edits and associated executions *) 
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datatype node_edit = 
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Edits of (command_id option * command_id option) list  
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Header of node_header  
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Perspective of command_id list; 
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type edit = string * node_edit; 
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fun after_entry (Node {entries, ...}) = Entries.get_after entries; 
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fun lookup_entry (Node {entries, ...}) id = 
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(case Entries.lookup entries id of 
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NONE => NONE 
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 SOME (exec, _) => exec); 
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fun the_entry (Node {entries, ...}) id = 
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(case Entries.lookup entries id of 
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NONE => err_undef "command entry" id 
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 SOME (exec, _) => exec); 
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fun the_default_entry node (SOME id) = the_default no_id (the_entry node id) 
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 the_default_entry _ NONE = no_id; 
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fun update_entry id exec = 
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map_entries (Entries.update (id, exec)); 
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fun reset_entry id node = 
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if is_some (lookup_entry node id) then update_entry id NONE node else node; 
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fun reset_after id entries = 
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(case Entries.get_after entries id of 
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NONE => entries 
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 SOME next => Entries.update (next, NONE) entries); 
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val edit_node = map_entries o fold 
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(fn (id, SOME id2) => Entries.insert_after id (id2, NONE) 

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 (id, NONE) => Entries.delete_after id #> reset_after id); 

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(* version operations *) 
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val empty_version = Version Graph.empty; 
176 

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fun nodes_of (Version nodes) = nodes; 
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val node_of = get_node o nodes_of; 
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local 
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44185  182 
fun cycle_msg names = "Cyclic dependency of " ^ space_implode " via " (map quote names); 
44180  183 

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fun touch_node name nodes = 
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fold (fn desc => 
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update_node desc (set_touched true) #> 
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desc <> name ? update_node desc (map_entries (reset_after NONE))) 
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(Graph.all_succs nodes [name]) nodes; 
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in 
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fun edit_nodes (name, node_edit) (Version nodes) = 
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Version 
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(case node_edit of 
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Clear => 
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nodes 
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> update_node name clear_node 
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> touch_node name 
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 Edits edits => 
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nodes 
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> update_node name (edit_node edits) 
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> touch_node name 
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 Header header => 
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let 
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val parents = (case header of Exn.Res (_, parents, _) => parents  _ => []); 
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val nodes1 = nodes 
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> default_node name 
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> fold default_node parents; 
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val nodes2 = nodes1 
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> Graph.Keys.fold 
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(fn dep => Graph.del_edge (dep, name)) (Graph.imm_preds nodes1 name); 
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val (header', nodes3) = 
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(header, Graph.add_deps_acyclic (name, parents) nodes2) 
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handle Graph.CYCLES cs => (Exn.Exn (ERROR (cat_lines (map cycle_msg cs))), nodes2); 
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in Graph.map_node name (set_header header') nodes3 end 
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> touch_node name 
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 Perspective perspective => 
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update_node name (set_perspective perspective) nodes); 
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end; 
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fun put_node (name, node) (Version nodes) = 
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Version (update_node name (K node) nodes); 
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224 

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end; 
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(** global state  document structure and execution process **) 
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230 

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abstype state = State of 
40398  232 
{versions: version Inttab.table, (*version_id > document content*) 
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commands: 
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Toplevel.transition future Inttab.table * (*command_id > transition (future parsing)*) 
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Toplevel.transition future list, (*recent commands to be joined*) 
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execs: (command_id * (Toplevel.state * unit lazy) lazy) Inttab.table, 
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(*exec_id > command_id with eval/print process*) 
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execution: Future.group} (*global execution process*) 
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with 
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240 

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fun make_state (versions, commands, execs, execution) = 
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State {versions = versions, commands = commands, execs = execs, execution = execution}; 
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fun map_state f (State {versions, commands, execs, execution}) = 
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make_state (f (versions, commands, execs, execution)); 
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246 

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val init_state = 
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make_state (Inttab.make [(no_id, empty_version)], 
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(Inttab.make [(no_id, Future.value Toplevel.empty)], []), 
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Inttab.make [(no_id, (no_id, Lazy.value (Toplevel.toplevel, no_print)))], 
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Future.new_group NONE); 
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252 

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253 

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(* document versions *) 
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255 

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fun define_version (id: version_id) version = 
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map_state (fn (versions, commands, execs, execution) => 
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let val versions' = Inttab.update_new (id, version) versions 
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handle Inttab.DUP dup => err_dup "document version" dup 
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in (versions', commands, execs, execution) end); 
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261 

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fun the_version (State {versions, ...}) (id: version_id) = 
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(case Inttab.lookup versions id of 
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NONE => err_undef "document version" id 
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 SOME version => version); 
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266 

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(* commands *) 
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fun define_command (id: command_id) text = 
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map_state (fn (versions, (commands, recent), execs, execution) => 
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let 
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val id_string = print_id id; 
44302  274 
val tr = 
275 
Future.fork_pri 2 (fn () => 

276 
Position.setmp_thread_data (Position.id_only id_string) 

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(fn () => Outer_Syntax.read_command (Position.id id_string) text) ()); 
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val commands' = 
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Inttab.update_new (id, tr) commands 
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handle Inttab.DUP dup => err_dup "command" dup; 
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in (versions, (commands', tr :: recent), execs, execution) end); 
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282 

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fun the_command (State {commands, ...}) (id: command_id) = 
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(case Inttab.lookup (#1 commands) id of 
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NONE => err_undef "command" id 
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 SOME tr => tr); 
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val join_commands = 
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map_state (fn (versions, (commands, recent), execs, execution) => 
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(Future.join_results recent; (versions, (commands, []), execs, execution))); 
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(* command executions *) 
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294 

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fun define_exec (exec_id, exec) = 
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map_state (fn (versions, commands, execs, execution) => 
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let val execs' = Inttab.update_new (exec_id, exec) execs 
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handle Inttab.DUP dup => err_dup "command execution" dup 
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in (versions, commands, execs', execution) end); 
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300 

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301 
fun the_exec (State {execs, ...}) exec_id = 
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302 
(case Inttab.lookup execs exec_id of 
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303 
NONE => err_undef "command execution" exec_id 
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304 
 SOME exec => exec); 
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305 

41634
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306 

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307 
(* document execution *) 
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308 

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309 
fun cancel_execution (State {execution, ...}) = Future.cancel_group execution; 
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310 

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311 
end; 
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312 

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313 

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314 

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315 
(* toplevel transactions *) 
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316 

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317 
local 
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318 

44440  319 
fun timing tr t = 
320 
if Timing.is_relevant t then Toplevel.status tr (Markup.timing t) else (); 

40391
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321 

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322 
fun proof_status tr st = 
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323 
(case try Toplevel.proof_of st of 
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324 
SOME prf => Toplevel.status tr (Proof.status_markup prf) 
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325 
 NONE => ()); 
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326 

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327 
fun print_state tr st = 
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328 
(Lazy.lazy o Toplevel.setmp_thread_position tr) 
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329 
(fn () => Toplevel.print_state false st); 
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330 

40390  331 
fun run int tr st = 
332 
(case Toplevel.transition int tr st of 

333 
SOME (st', NONE) => ([], SOME st') 

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334 
 SOME (_, SOME (exn, _)) => (ML_Compiler.exn_messages exn, NONE) 
44270
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335 
 NONE => ([(serial (), ML_Compiler.exn_message Runtime.TERMINATE)], NONE)); 
40390  336 

38888
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337 
in 
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338 

44199
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339 
fun run_command tr st = 
44185  340 
let 
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341 
val is_init = Toplevel.is_init tr; 
44185  342 
val is_proof = Keyword.is_proof (Toplevel.name_of tr); 
343 
val do_print = not is_init andalso (Toplevel.print_of tr orelse is_proof); 

344 

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345 
val _ = Multithreading.interrupted (); 
44611  346 
val _ = Toplevel.status tr Markup.forked; 
44185  347 
val start = Timing.start (); 
348 
val (errs, result) = 

349 
if Toplevel.is_toplevel st andalso not is_init then ([], SOME st) 

350 
else run (is_init orelse is_proof) (Toplevel.set_print false tr) st; 

351 
val _ = timing tr (Timing.result start); 

44611  352 
val _ = Toplevel.status tr Markup.joined; 
44185  353 
val _ = List.app (Toplevel.error_msg tr) errs; 
354 
in 

355 
(case result of 

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356 
NONE => 
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357 
(if null errs then Exn.interrupt () else (); 
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358 
Toplevel.status tr Markup.failed; 
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359 
(st, no_print)) 
44185  360 
 SOME st' => 
361 
(Toplevel.status tr Markup.finished; 

362 
proof_status tr st'; 

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363 
(st', if do_print then print_state tr st' else no_print))) 
44185  364 
end; 
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365 

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366 
end; 
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367 

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368 

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369 

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370 

44481  371 
(** update **) 
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372 

44436
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373 
(* perspective *) 
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374 

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375 
fun update_perspective (old_id: version_id) (new_id: version_id) name perspective state = 
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376 
let 
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377 
val old_version = the_version state old_id; 
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378 
val _ = Time.now (); (* FIXME odd workaround for polyml5.4.0/x86_64  needed? *) 
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379 
val new_version = edit_nodes (name, Perspective perspective) old_version; 
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380 
in define_version new_id new_version state end; 
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381 

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382 

44481  383 
(* edits *) 
38418
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384 

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385 
local 
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386 

44482
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387 
fun last_common last_visible node0 node = 
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388 
let 
44544
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389 
fun get_common ((prev, id), exec) (found, (_, visible)) = 
44482
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390 
if found then NONE 
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391 
else 
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392 
let val found' = is_none exec orelse exec <> lookup_entry node0 id 
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393 
in SOME (found', (prev, visible andalso prev <> last_visible)) end; 
44483
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diff
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394 
in #2 (iterate_entries NONE get_common node (false, (NONE, true))) end; 
44482
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changeset

395 

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diff
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396 
fun new_exec state init command_id' (execs, exec) = 
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397 
let 
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398 
val command' = the_command state command_id'; 
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diff
changeset

399 
val exec_id' = new_id (); 
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diff
changeset

400 
val exec' = 
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diff
changeset

401 
snd exec > Lazy.map (fn (st, _) => 
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diff
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402 
let val tr = 
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further clarification of Document.updated, based on last_common and after_entry;
wenzelm
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diff
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403 
Future.join command' 
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wenzelm
parents:
44481
diff
changeset

404 
> Toplevel.modify_init init 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
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diff
changeset

405 
> Toplevel.put_id (print_id exec_id'); 
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diff
changeset

406 
in run_command tr st end) 
c7225307acf2
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44481
diff
changeset

407 
> pair command_id'; 
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diff
changeset

408 
in ((exec_id', exec') :: execs, exec') end; 
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diff
changeset

409 

44544
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diff
changeset

410 
fun make_required nodes = 
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diff
changeset

411 
let 
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diff
changeset

412 
val all_visible = 
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diff
changeset

413 
Graph.fold (fn (a, (node, _)) => is_some (#2 (get_perspective node)) ? cons a) nodes [] 
da5f0af32c1b
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diff
changeset

414 
> Graph.all_preds nodes; 
da5f0af32c1b
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44483
diff
changeset

415 
val required = 
da5f0af32c1b
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diff
changeset

416 
fold (fn a => exists (fn b => Graph.is_edge nodes (a, b)) all_visible ? Symtab.update (a, ())) 
da5f0af32c1b
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diff
changeset

417 
all_visible Symtab.empty; 
da5f0af32c1b
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diff
changeset

418 
in Symtab.defined required end; 
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419 

44441  420 
fun init_theory deps name node = 
44435  421 
let 
422 
val (thy_name, imports, uses) = Exn.release (get_header node); 

423 
(* FIXME provide files via Scala layer *) 

424 
val (dir, files) = 

425 
if ML_System.platform_is_cygwin then (Path.current, []) 

426 
else (Path.dir (Path.explode name), map (apfst Path.explode) uses); 

427 

428 
val parents = 

429 
imports > map (fn import => 

44441  430 
(case Thy_Info.lookup_theory import of (* FIXME more robust!? *) 
44435  431 
SOME thy => thy 
432 
 NONE => 

433 
get_theory (Position.file_only import) 

44482
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
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diff
changeset

434 
(snd (Future.join (the (AList.lookup (op =) deps import)))))); 
44435  435 
in Thy_Load.begin_theory dir thy_name imports files parents end; 
436 

38418
9a7af64d71bb
more explicit / functional ML version of document model;
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parents:
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changeset

437 
in 
9a7af64d71bb
more explicit / functional ML version of document model;
wenzelm
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diff
changeset

438 

44481  439 
fun update (old_id: version_id) (new_id: version_id) edits state = 
38418
9a7af64d71bb
more explicit / functional ML version of document model;
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diff
changeset

440 
let 
9a7af64d71bb
more explicit / functional ML version of document model;
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parents:
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diff
changeset

441 
val old_version = the_version state old_id; 
44180  442 
val _ = Time.now (); (* FIXME odd workaround for polyml5.4.0/x86_64 *) 
44222
9d5ef6cd4ee1
use full .thy file name as node name, which makes MiscUtilities.resolveSymlinks/File.getCanonicalPath more predictable;
wenzelm
parents:
44202
diff
changeset

443 
val new_version = fold edit_nodes edits old_version; 
38418
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more explicit / functional ML version of document model;
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diff
changeset

444 

44544
da5f0af32c1b
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parents:
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diff
changeset

445 
val nodes = nodes_of new_version; 
da5f0af32c1b
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wenzelm
parents:
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diff
changeset

446 
val is_required = make_required nodes; 
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wenzelm
parents:
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diff
changeset

447 

44476
e8a87398f35d
propagate information about last command with exec state assignment through document model;
wenzelm
parents:
44446
diff
changeset

448 
val updated = 
44544
da5f0af32c1b
more precise treatment of nodes that are fully required for partially visible ones;
wenzelm
parents:
44483
diff
changeset

449 
nodes > Graph.schedule 
44199
e38885e3ea60
retrieve imports from document state, with fallback on theory loader for preloaded theories;
wenzelm
parents:
44198
diff
changeset

450 
(fn deps => fn (name, node) => 
44544
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diff
changeset

451 
if not (is_touched node orelse is_required name) 
da5f0af32c1b
more precise treatment of nodes that are fully required for partially visible ones;
wenzelm
parents:
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diff
changeset

452 
then Future.value (([], [], []), node) 
44444
33a5616a7571
tuned Document.node: maintain "touched" flag to indicate changes in entries etc.;
wenzelm
parents:
44441
diff
changeset

453 
else 
44479
9a04e7502e22
refined document state assignment: observe perspective, more explicit assignment message;
wenzelm
parents:
44478
diff
changeset

454 
let 
9a04e7502e22
refined document state assignment: observe perspective, more explicit assignment message;
wenzelm
parents:
44478
diff
changeset

455 
val node0 = node_of old_version name; 
9a04e7502e22
refined document state assignment: observe perspective, more explicit assignment message;
wenzelm
parents:
44478
diff
changeset

456 
fun init () = init_theory deps name node; 
9a04e7502e22
refined document state assignment: observe perspective, more explicit assignment message;
wenzelm
parents:
44478
diff
changeset

457 
in 
44482
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
44481
diff
changeset

458 
(singleton o Future.forks) 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
44481
diff
changeset

459 
{name = "Document.update", group = NONE, 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
44481
diff
changeset

460 
deps = map (Future.task_of o #2) deps, pri = 0, interrupts = false} 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
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diff
changeset

461 
(fn () => 
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further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
44481
diff
changeset

462 
let 
44544
da5f0af32c1b
more precise treatment of nodes that are fully required for partially visible ones;
wenzelm
parents:
44483
diff
changeset

463 
val required = is_required name; 
44482
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
44481
diff
changeset

464 
val last_visible = #2 (get_perspective node); 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
wenzelm
parents:
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diff
changeset

465 
val (common, visible) = last_common last_visible node0 node; 
c7225307acf2
further clarification of Document.updated, based on last_common and after_entry;
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466 
val common_exec = the_exec state (the_default_entry node common); 
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467 

44482
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468 
val (execs, exec) = ([], common_exec) > 
44544
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more precise treatment of nodes that are fully required for partially visible ones;
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469 
(visible orelse required) ? 
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470 
iterate_entries (after_entry node common) 
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471 
(fn ((prev, id), _) => fn res => 
44544
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472 
if not required andalso prev = last_visible then NONE 
44482
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473 
else SOME (new_exec state init id res)) node; 
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474 

44482
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475 
val no_execs = 
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476 
iterate_entries (after_entry node0 common) 
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changeset

477 
(fn ((_, id0), exec0) => fn res => 
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478 
if is_none exec0 then NONE 
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479 
else if exists (fn (_, (id, _)) => id0 = id) execs then SOME res 
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changeset

480 
else SOME (id0 :: res)) node0 []; 
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changeset

481 

44482
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482 
val last_exec = if #1 exec = no_id then NONE else SOME (#1 exec); 
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diff
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483 
val result = 
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changeset

484 
if is_some (after_entry node last_exec) then no_result 
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changeset

485 
else Lazy.map #1 (#2 exec); 
44480
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changeset

486 

44482
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487 
val node' = node 
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changeset

488 
> fold reset_entry no_execs 
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489 
> fold (fn (exec_id, (id, _)) => update_entry id (SOME exec_id)) execs 
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490 
> set_last_exec last_exec 
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491 
> set_result result 
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492 
> set_touched false; 
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493 
in ((no_execs, execs, [(name, node')]), node') end) 
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494 
end) 
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495 
> Future.joins > map #1; 
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changeset

496 

44479
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497 
val command_execs = 
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changeset

498 
map (rpair NONE) (maps #1 updated) @ 
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diff
changeset

499 
map (fn (exec_id, (command_id, _)) => (command_id, SOME exec_id)) (maps #2 updated); 
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changeset

500 
val updated_nodes = maps #3 updated; 
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changeset

501 
val last_execs = map (fn (name, node) => (name, get_last_exec node)) updated_nodes; 
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changeset

502 

44197
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refined Document.edit: less stateful update via Graph.schedule;
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diff
changeset

503 
val state' = state 
44479
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diff
changeset

504 
> fold (fold define_exec o #2) updated 
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changeset

505 
> define_version new_id (fold put_node updated_nodes new_version); 
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diff
changeset

506 
in ((command_execs, last_execs), state') end; 
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diff
changeset

507 

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changeset

508 
end; 
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more explicit / functional ML version of document model;
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diff
changeset

509 

9a7af64d71bb
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diff
changeset

510 

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diff
changeset

511 
(* execute *) 
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diff
changeset

512 

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changeset

513 
fun execute version_id state = 
41673  514 
state > map_state (fn (versions, commands, execs, _) => 
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wenzelm
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diff
changeset

515 
let 
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diff
changeset

516 
val version = the_version state version_id; 
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changeset

517 

44386
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diff
changeset

518 
fun force_exec _ NONE = () 
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diff
changeset

519 
 force_exec node (SOME exec_id) = 
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diff
changeset

520 
let 
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diff
changeset

521 
val (command_id, exec) = the_exec state exec_id; 
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diff
changeset

522 
val (_, print) = Lazy.force exec; 
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diff
changeset

523 
val _ = 
44439
2bcd2aefaf7f
print state only for visible command, to avoid wasting resources for the larger part of the text;
wenzelm
parents:
44436
diff
changeset

524 
if #1 (get_perspective node) command_id 
44386
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parents:
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diff
changeset

525 
then ignore (Lazy.future Future.default_params print) 
4048ca2658b7
some support for toplevel printing wrt. editor perspective (still inactive);
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diff
changeset

526 
else (); 
4048ca2658b7
some support for toplevel printing wrt. editor perspective (still inactive);
wenzelm
parents:
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diff
changeset

527 
in () end; 
38418
9a7af64d71bb
more explicit / functional ML version of document model;
wenzelm
parents:
38414
diff
changeset

528 

44300
349cc426d929
tuned signature  treat structure Task_Queue as private to implementation;
wenzelm
parents:
44299
diff
changeset

529 
val execution = Future.new_group NONE; 
44299
061599cb6eb0
refined Future.cancel: explicit future allows to join actual cancellation;
wenzelm
parents:
44271
diff
changeset

530 
val _ = 
44201  531 
nodes_of version > Graph.schedule 
532 
(fn deps => fn (name, node) => 

44302  533 
(singleton o Future.forks) 
534 
{name = "theory:" ^ name, group = SOME (Future.new_group (SOME execution)), 

44614
466ea227e00d
more careful treatment of interrupts, to retain them within forked/joined boundary of command transactions;
wenzelm
parents:
44611
diff
changeset

535 
deps = map (Future.task_of o #2) deps, pri = 1, interrupts = false} 
44483
383a5b9efbd0
tuned signature  iterate subsumes both fold and get_first;
wenzelm
parents:
44482
diff
changeset

536 
(iterate_entries NONE (fn (_, exec) => fn () => SOME (force_exec node exec)) node)); 
40520
77a7b0a7d4b1
await_cancellation in the main thread, independently of the execution futures, which might get interrupted or be absent after node deletetion;
wenzelm
parents:
40481
diff
changeset

537 

44299
061599cb6eb0
refined Future.cancel: explicit future allows to join actual cancellation;
wenzelm
parents:
44271
diff
changeset

538 
in (versions, commands, execs, execution) end); 
38418
9a7af64d71bb
more explicit / functional ML version of document model;
wenzelm
parents:
38414
diff
changeset

539 

43713
1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

540 

1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

541 

1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

542 
(** global state **) 
1ba5331b4623
moved global state to structure Document (again);
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parents:
43668
diff
changeset

543 

1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
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diff
changeset

544 
val global_state = Synchronized.var "Document" init_state; 
1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

545 

1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

546 
fun state () = Synchronized.value global_state; 
1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

547 
val change_state = Synchronized.change global_state; 
1ba5331b4623
moved global state to structure Document (again);
wenzelm
parents:
43668
diff
changeset

548 

38418
9a7af64d71bb
more explicit / functional ML version of document model;
wenzelm
parents:
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changeset

549 
end; 
9a7af64d71bb
more explicit / functional ML version of document model;
wenzelm
parents:
38414
diff
changeset

550 