author | wenzelm |
Sat, 25 Jul 2009 00:39:05 +0200 | |
changeset 32185 | 57ecfab3bcfe |
parent 32184 | cfa0ef0c0c5f |
child 32186 | 8026b73cd357 |
permissions | -rw-r--r-- |
28241 | 1 |
(* Title: Pure/Concurrent/simple_thread.ML |
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Author: Makarius |
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28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
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Simplified thread operations. |
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*) |
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signature SIMPLE_THREAD = |
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sig |
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val fork: bool -> (unit -> unit) -> Thread.thread |
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val interrupt: Thread.thread -> unit |
28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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val synchronized: string -> Mutex.mutex -> (unit -> 'a) -> 'a |
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end; |
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structure SimpleThread: SIMPLE_THREAD = |
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struct |
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fun fork interrupts body = |
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Thread.fork (fn () => exception_trace (fn () => body ()), |
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if interrupts then Multithreading.regular_interrupts else Multithreading.no_interrupts); |
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fun interrupt thread = Thread.interrupt thread handle Thread _ => (); |
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28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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(* basic synchronization *) |
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
26 |
fun synchronized name lock e = Exn.release (uninterruptible (fn restore_attributes => fn () => |
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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let |
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val immediate = |
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if Mutex.trylock lock then true |
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28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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else |
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let |
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val _ = Multithreading.tracing 5 (fn () => name ^ ": locking ..."); |
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val time = Multithreading.real_time Mutex.lock lock; |
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val _ = Multithreading.tracing_time time |
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(fn () => name ^ ": locked after " ^ Time.toString time); |
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in false end; |
28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
37 |
val result = Exn.capture (restore_attributes e) (); |
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val _ = |
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if immediate then () else Multithreading.tracing 5 (fn () => name ^ ": unlocking ..."); |
28577
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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val _ = Mutex.unlock lock; |
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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in result end) ()); |
bd2456e0d944
added generic combinator for synchronized evaluation (formerly in future.ML);
wenzelm
parents:
28550
diff
changeset
|
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end; |