author | wenzelm |
Wed, 24 Feb 2016 22:11:28 +0100 | |
changeset 62400 | 833af0d6d469 |
parent 62399 | 36e885190439 |
child 62543 | 57f379ef662f |
permissions | -rw-r--r-- |
60991 | 1 |
/* Title: Pure/Concurrent/bash.scala |
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Author: Makarius |
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GNU bash processes, with propagation of interrupts. |
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*/ |
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package isabelle |
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import java.io.{File => JFile, BufferedReader, InputStreamReader, |
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BufferedWriter, OutputStreamWriter} |
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object Bash |
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{ |
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def process(cwd: JFile, env: Map[String, String], redirect: Boolean, args: String*): Process = |
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new Process(cwd, env, redirect, args:_*) |
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class Process private [Bash]( |
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cwd: JFile, env: Map[String, String], redirect: Boolean, args: String*) |
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extends Prover.System_Process |
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{ |
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private val proc = |
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e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
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{ |
e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
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val params = |
e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
|
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List(File.platform_path(Path.variable("ISABELLE_BASH_PROCESS")), "-", "bash") |
e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
|
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Isabelle_System.process( |
e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
|
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cwd, Isabelle_System.settings(env), redirect, (params ::: args.toList):_*) |
e7a52a838a23
more direct invocation of ISABELLE_BASH_PROCESS on Windows;
wenzelm
parents:
62303
diff
changeset
|
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} |
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// channels |
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val stdin: BufferedWriter = |
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new BufferedWriter(new OutputStreamWriter(proc.getOutputStream, UTF8.charset)) |
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val stdout: BufferedReader = |
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new BufferedReader(new InputStreamReader(proc.getInputStream, UTF8.charset)) |
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val stderr: BufferedReader = |
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new BufferedReader(new InputStreamReader(proc.getErrorStream, UTF8.charset)) |
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// signals |
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private val pid = stdout.readLine |
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private def kill(signal: String): Boolean = |
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Exn.Interrupt.postpone { |
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Isabelle_System.kill(signal, pid) |
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Isabelle_System.kill("0", pid)._2 == 0 } getOrElse true |
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private def multi_kill(signal: String): Boolean = |
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{ |
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var running = true |
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var count = 10 |
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while (running && count > 0) { |
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if (kill(signal)) { |
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Exn.Interrupt.postpone { |
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Thread.sleep(100) |
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count -= 1 |
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} |
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} |
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else running = false |
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} |
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running |
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} |
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def interrupt() { multi_kill("INT") } |
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def terminate() { multi_kill("INT") && multi_kill("TERM") && kill("KILL"); proc.destroy } |
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// JVM shutdown hook |
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private val shutdown_hook = new Thread { override def run = terminate() } |
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try { Runtime.getRuntime.addShutdownHook(shutdown_hook) } |
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catch { case _: IllegalStateException => } |
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private def cleanup() = |
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try { Runtime.getRuntime.removeShutdownHook(shutdown_hook) } |
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catch { case _: IllegalStateException => } |
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/* result */ |
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def join: Int = { val rc = proc.waitFor; cleanup(); rc } |
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} |
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} |