author | wenzelm |
Thu, 31 Dec 2009 00:35:54 +0100 | |
changeset 34215 | f0322b595146 |
parent 34214 | 99eefb83a35d |
child 36735 | 42b7f881f5fc |
permissions | -rw-r--r-- |
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moved isabelle_process.ML, isabelle_process.scala, isar.ML, session.ML to Pure/System/ (together with associated Isar commands);
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/* Title: Pure/System/isabelle_process.ML |
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Author: Makarius |
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Options: :folding=explicit:collapseFolds=1: |
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Isabelle process management -- always reactive due to multi-threaded I/O. |
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*/ |
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package isabelle |
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use java.util.concurrent.LinkedBlockingQueue, which blocks as required;
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import java.util.concurrent.LinkedBlockingQueue |
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import java.io.{BufferedReader, BufferedWriter, InputStreamReader, OutputStreamWriter, |
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InputStream, OutputStream, IOException} |
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import scala.actors.Actor |
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import Actor._ |
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object Isabelle_Process |
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{ |
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/* results */ |
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object Kind extends Enumeration { |
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//{{{ values and codes |
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// internal system notification |
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val SYSTEM = Value("SYSTEM") |
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// Posix channels/events |
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val STDIN = Value("STDIN") |
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val STDOUT = Value("STDOUT") |
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val SIGNAL = Value("SIGNAL") |
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val EXIT = Value("EXIT") |
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// Isabelle messages |
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val INIT = Value("INIT") |
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val STATUS = Value("STATUS") |
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val WRITELN = Value("WRITELN") |
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val PRIORITY = Value("PRIORITY") |
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val TRACING = Value("TRACING") |
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val WARNING = Value("WARNING") |
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val ERROR = Value("ERROR") |
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val DEBUG = Value("DEBUG") |
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// messages codes |
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val code = Map( |
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('A' : Int) -> Kind.INIT, |
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('B' : Int) -> Kind.STATUS, |
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('C' : Int) -> Kind.WRITELN, |
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('D' : Int) -> Kind.PRIORITY, |
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('E' : Int) -> Kind.TRACING, |
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('F' : Int) -> Kind.WARNING, |
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('G' : Int) -> Kind.ERROR, |
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('H' : Int) -> Kind.DEBUG, |
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('0' : Int) -> Kind.SYSTEM, |
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('1' : Int) -> Kind.STDIN, |
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('2' : Int) -> Kind.STDOUT, |
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('3' : Int) -> Kind.SIGNAL, |
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('4' : Int) -> Kind.EXIT) |
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// message markup |
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val markup = Map( |
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Kind.INIT -> Markup.INIT, |
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Kind.STATUS -> Markup.STATUS, |
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Kind.WRITELN -> Markup.WRITELN, |
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Kind.PRIORITY -> Markup.PRIORITY, |
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Kind.TRACING -> Markup.TRACING, |
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Kind.WARNING -> Markup.WARNING, |
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Kind.ERROR -> Markup.ERROR, |
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Kind.DEBUG -> Markup.DEBUG, |
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Kind.SYSTEM -> Markup.SYSTEM, |
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Kind.STDIN -> Markup.STDIN, |
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Kind.STDOUT -> Markup.STDOUT, |
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Kind.SIGNAL -> Markup.SIGNAL, |
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Kind.EXIT -> Markup.EXIT) |
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//}}} |
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def is_raw(kind: Value) = |
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kind == STDOUT |
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def is_control(kind: Value) = |
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kind == SYSTEM || |
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kind == SIGNAL || |
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kind == EXIT |
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def is_system(kind: Value) = |
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kind == SYSTEM || |
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kind == STDIN || |
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kind == SIGNAL || |
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kind == EXIT || |
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kind == STATUS |
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} |
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class Result(val kind: Kind.Value, val props: List[(String, String)], val body: List[XML.Tree]) |
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{ |
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def message = XML.Elem(Markup.MESSAGE, (Markup.CLASS, Kind.markup(kind)) :: props, body) |
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override def toString: String = |
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{ |
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val res = |
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if (kind == Kind.STATUS) body.map(_.toString).mkString |
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else body.map(XML.content(_).mkString).mkString |
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if (props.isEmpty) |
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kind.toString + " [[" + res + "]]" |
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else |
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kind.toString + " " + |
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(for ((x, y) <- props) yield x + "=" + y).mkString("{", ",", "}") + " [[" + res + "]]" |
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} |
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def is_raw = Kind.is_raw(kind) |
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def is_control = Kind.is_control(kind) |
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def is_system = Kind.is_system(kind) |
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def is_ready = kind == Kind.STATUS && body == List(XML.Elem(Markup.READY, Nil, Nil)) |
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def cache(c: XML.Cache): Result = |
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new Result(kind, c.cache_props(props), c.cache_trees(body)) |
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} |
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} |
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class Isabelle_Process(system: Isabelle_System, receiver: Actor, args: String*) |
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{ |
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import Isabelle_Process._ |
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/* demo constructor */ |
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def this(args: String*) = |
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this(new Isabelle_System, |
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actor { loop { react { case res => Console.println(res) } } }, args: _*) |
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/* process information */ |
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@volatile private var proc: Process = null |
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@volatile private var closing = false |
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@volatile private var pid: String = null |
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/* results */ |
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private def put_result(kind: Kind.Value, props: List[(String, String)], body: List[XML.Tree]) |
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{ |
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if (kind == Kind.INIT) { |
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for ((Markup.PID, p) <- props) pid = p |
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} |
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receiver ! new Result(kind, props, body) |
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} |
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private def put_result(kind: Kind.Value, text: String) |
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{ |
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put_result(kind, Nil, List(XML.Text(system.symbols.decode(text)))) |
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} |
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/* signals */ |
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def interrupt() = synchronized { |
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if (proc == null) error("Cannot interrupt Isabelle: no process") |
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if (pid == null) put_result(Kind.SYSTEM, "Cannot interrupt: unknown pid") |
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else { |
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try { |
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if (system.execute(true, "kill", "-INT", pid).waitFor == 0) |
155 |
put_result(Kind.SIGNAL, "INT") |
|
27990 | 156 |
else |
34100 | 157 |
put_result(Kind.SYSTEM, "Cannot interrupt: kill command failed") |
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158 |
} |
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|
159 |
catch { case e: IOException => error("Cannot interrupt Isabelle: " + e.getMessage) } |
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160 |
} |
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|
161 |
} |
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|
162 |
|
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|
163 |
def kill() = synchronized { |
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|
164 |
if (proc == 0) error("Cannot kill Isabelle: no process") |
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|
165 |
else { |
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|
166 |
try_close() |
27990 | 167 |
Thread.sleep(500) |
34100 | 168 |
put_result(Kind.SIGNAL, "KILL") |
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|
169 |
proc.destroy |
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|
170 |
proc = null |
27990 | 171 |
pid = null |
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|
172 |
} |
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|
173 |
} |
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|
174 |
|
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|
175 |
|
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|
176 |
/* output being piped into the process */ |
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177 |
|
27990 | 178 |
private val output = new LinkedBlockingQueue[String] |
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179 |
|
28045 | 180 |
private def output_raw(text: String) = synchronized { |
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|
181 |
if (proc == null) error("Cannot output to Isabelle: no process") |
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|
182 |
if (closing) error("Cannot output to Isabelle: already closing") |
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183 |
output.put(text) |
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184 |
} |
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|
185 |
|
28303 | 186 |
def output_sync(text: String) = |
28045 | 187 |
output_raw(" \\<^sync>\n; " + text + " \\<^sync>;\n") |
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|
188 |
|
27963 | 189 |
|
190 |
def command(text: String) = |
|
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|
191 |
output_sync("Isabelle.command " + Isabelle_Syntax.encode_string(text)) |
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|
192 |
|
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|
193 |
def command(props: List[(String, String)], text: String) = |
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|
194 |
output_sync("Isabelle.command " + Isabelle_Syntax.encode_properties(props) + " " + |
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|
195 |
Isabelle_Syntax.encode_string(text)) |
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196 |
|
27963 | 197 |
def ML(text: String) = |
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|
198 |
output_sync("ML_val " + Isabelle_Syntax.encode_string(text)) |
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|
199 |
|
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|
200 |
def close() = synchronized { // FIXME watchdog/timeout |
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|
201 |
output_raw("\u0000") |
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|
202 |
closing = true |
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|
203 |
} |
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|
204 |
|
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|
205 |
def try_close() = synchronized { |
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|
206 |
if (proc != null && !closing) { |
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|
207 |
try { close() } |
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|
208 |
catch { case _: RuntimeException => } |
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|
209 |
} |
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|
210 |
} |
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|
211 |
|
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changeset
|
212 |
|
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|
213 |
/* stdin */ |
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|
214 |
|
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changeset
|
215 |
private class Stdin_Thread(out_stream: OutputStream) extends Thread("isabelle: stdin") { |
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|
216 |
override def run() = { |
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c95dcd12f48a
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|
217 |
val writer = new BufferedWriter(new OutputStreamWriter(out_stream, Standard_System.charset)) |
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|
218 |
var finished = false |
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changeset
|
219 |
while (!finished) { |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
220 |
try { |
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Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
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diff
changeset
|
221 |
//{{{ |
27955
4c32c5e75eca
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parents:
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changeset
|
222 |
val s = output.take |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
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|
223 |
if (s == "\u0000") { |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
224 |
writer.close |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
225 |
finished = true |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
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changeset
|
226 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
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changeset
|
227 |
else { |
34100 | 228 |
put_result(Kind.STDIN, s) |
27949
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changeset
|
229 |
writer.write(s) |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
230 |
writer.flush |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
231 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
232 |
//}}} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
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parents:
diff
changeset
|
233 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
234 |
catch { |
34100 | 235 |
case e: IOException => put_result(Kind.SYSTEM, "Stdin thread: " + e.getMessage) |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
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parents:
diff
changeset
|
236 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
237 |
} |
34100 | 238 |
put_result(Kind.SYSTEM, "Stdin thread terminated") |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
239 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
240 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
241 |
|
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
242 |
|
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
243 |
/* stdout */ |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
244 |
|
34213
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removed obsolete version check -- sanity delegated to Isabelle_System;
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34201
diff
changeset
|
245 |
private class Stdout_Thread(in_stream: InputStream) extends Thread("isabelle: stdout") { |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
246 |
override def run() = { |
34201
c95dcd12f48a
separate Standard_System (Cygwin/Posix compatibility) vs. Isabelle_System (settings environment etc.);
wenzelm
parents:
34117
diff
changeset
|
247 |
val reader = new BufferedReader(new InputStreamReader(in_stream, Standard_System.charset)) |
28045 | 248 |
var result = new StringBuilder(100) |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
249 |
|
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
250 |
var finished = false |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
251 |
while (!finished) { |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
252 |
try { |
28045 | 253 |
//{{{ |
254 |
var c = -1 |
|
255 |
var done = false |
|
256 |
while (!done && (result.length == 0 || reader.ready)) { |
|
257 |
c = reader.read |
|
258 |
if (c >= 0) result.append(c.asInstanceOf[Char]) |
|
259 |
else done = true |
|
260 |
} |
|
261 |
if (result.length > 0) { |
|
34100 | 262 |
put_result(Kind.STDOUT, result.toString) |
28045 | 263 |
result.length = 0 |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
264 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
265 |
else { |
28045 | 266 |
reader.close |
267 |
finished = true |
|
268 |
try_close() |
|
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
269 |
} |
28045 | 270 |
//}}} |
27963 | 271 |
} |
272 |
catch { |
|
34100 | 273 |
case e: IOException => put_result(Kind.SYSTEM, "Stdout thread: " + e.getMessage) |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
274 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
275 |
} |
34100 | 276 |
put_result(Kind.SYSTEM, "Stdout thread terminated") |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
277 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
278 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
279 |
|
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
280 |
|
28045 | 281 |
/* messages */ |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
282 |
|
34213
9e86c1ca6e51
removed obsolete version check -- sanity delegated to Isabelle_System;
wenzelm
parents:
34201
diff
changeset
|
283 |
private class Message_Thread(fifo: String) extends Thread("isabelle: messages") |
34100 | 284 |
{ |
285 |
private class Protocol_Error(msg: String) extends Exception(msg) |
|
286 |
override def run() |
|
287 |
{ |
|
288 |
val stream = system.fifo_stream(fifo) |
|
289 |
val default_buffer = new Array[Byte](65536) |
|
290 |
var c = -1 |
|
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
291 |
|
34100 | 292 |
def read_chunk(): List[XML.Tree] = |
293 |
{ |
|
294 |
//{{{ |
|
295 |
// chunk size |
|
296 |
var n = 0 |
|
297 |
c = stream.read |
|
298 |
while (48 <= c && c <= 57) { |
|
299 |
n = 10 * n + (c - 48) |
|
300 |
c = stream.read |
|
301 |
} |
|
302 |
if (c != 10) throw new Protocol_Error("bad message chunk header") |
|
303 |
||
304 |
// chunk content |
|
305 |
val buf = |
|
306 |
if (n <= default_buffer.size) default_buffer |
|
307 |
else new Array[Byte](n) |
|
308 |
||
309 |
var i = 0 |
|
310 |
var m = 0 |
|
311 |
do { |
|
312 |
m = stream.read(buf, i, n - i) |
|
313 |
i += m |
|
314 |
} while (m > 0 && n > i) |
|
315 |
||
316 |
if (i != n) throw new Protocol_Error("bad message chunk content") |
|
317 |
||
318 |
YXML.parse_body_failsafe(YXML.decode_chars(system.symbols.decode, buf, 0, n)) |
|
319 |
//}}} |
|
320 |
} |
|
321 |
||
322 |
do { |
|
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
323 |
try { |
34100 | 324 |
//{{{ |
325 |
c = stream.read |
|
326 |
var non_sync = 0 |
|
327 |
while (c >= 0 && c != 2) { |
|
328 |
non_sync += 1 |
|
329 |
c = stream.read |
|
28063 | 330 |
} |
34100 | 331 |
if (non_sync > 0) |
332 |
throw new Protocol_Error("lost synchronization -- skipping " + non_sync + " bytes") |
|
333 |
if (c == 2) { |
|
334 |
val header = read_chunk() |
|
335 |
val body = read_chunk() |
|
336 |
header match { |
|
337 |
case List(XML.Elem(name, props, Nil)) |
|
338 |
if name.size == 1 && Kind.code.isDefinedAt(name(0)) => |
|
339 |
put_result(Kind.code(name(0)), props, body) |
|
340 |
case _ => throw new Protocol_Error("bad header: " + header.toString) |
|
28063 | 341 |
} |
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
342 |
} |
34100 | 343 |
//}}} |
27963 | 344 |
} |
28063 | 345 |
catch { |
34100 | 346 |
case e: IOException => |
347 |
put_result(Kind.SYSTEM, "Cannot read message:\n" + e.getMessage) |
|
348 |
case e: Protocol_Error => |
|
349 |
put_result(Kind.SYSTEM, "Malformed message:\n" + e.getMessage) |
|
28063 | 350 |
} |
34100 | 351 |
} while (c != -1) |
352 |
stream.close |
|
353 |
try_close() |
|
354 |
||
355 |
put_result(Kind.SYSTEM, "Message thread terminated") |
|
27949
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
356 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
357 |
} |
6eb0327c0b9b
Isabelle process management -- always reactive due to multi-threaded I/O.
wenzelm
parents:
diff
changeset
|
358 |
|
6eb0327c0b9b
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359 |
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29192 | 360 |
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/** main **/ |
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Isabelle process management -- always reactive due to multi-threaded I/O.
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|
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{ |
29192 | 364 |
/* messages */ |
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|
34100 | 366 |
val message_fifo = system.mk_fifo() |
367 |
def rm_fifo() = system.rm_fifo(message_fifo) |
|
28045 | 368 |
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val message_thread = new Message_Thread(message_fifo) |
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message_thread.start |
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|
372 |
||
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/* exec process */ |
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try { |
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val cmdline = List(system.getenv_strict("ISABELLE_PROCESS"), "-W", message_fifo) ++ args |
377 |
proc = system.execute(true, cmdline: _*) |
|
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} |
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379 |
catch { |
28063 | 380 |
case e: IOException => |
381 |
rm_fifo() |
|
382 |
error("Failed to execute Isabelle process: " + e.getMessage) |
|
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383 |
} |
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384 |
|
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385 |
|
28045 | 386 |
/* stdin/stdout */ |
387 |
||
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388 |
new Stdin_Thread(proc.getOutputStream).start |
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389 |
new Stdout_Thread(proc.getInputStream).start |
28045 | 390 |
|
391 |
||
392 |
/* exit */ |
|
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393 |
|
28063 | 394 |
new Thread("isabelle: exit") { |
28045 | 395 |
override def run() = { |
396 |
val rc = proc.waitFor() |
|
397 |
Thread.sleep(300) |
|
34100 | 398 |
put_result(Kind.SYSTEM, "Exit thread terminated") |
399 |
put_result(Kind.EXIT, rc.toString) |
|
28063 | 400 |
rm_fifo() |
28045 | 401 |
} |
28063 | 402 |
}.start |
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403 |
} |
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404 |
} |