author | wenzelm |
Thu, 21 Sep 2023 23:45:03 +0200 | |
changeset 78681 | 38fe769658be |
parent 78678 | 5b2391321bab |
child 78688 | ff7db9055002 |
permissions | -rw-r--r-- |
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(* Title: Pure/Concurrent/isabelle_thread.ML |
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Author: Makarius |
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Isabelle-specific thread management. |
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*) |
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signature ISABELLE_THREAD = |
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sig |
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type T |
78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
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val get_thread: T -> Thread.Thread.thread |
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val get_name: T -> string |
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val get_id: T -> int |
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val equal: T * T -> bool |
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val print: T -> string |
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val self: unit -> T |
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val is_self: T -> bool |
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val stack_limit: unit -> int option |
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type params = {name: string, stack_limit: int option, interrupts: bool} |
78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
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val attributes: params -> Thread.Thread.threadAttribute list |
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val fork: params -> (unit -> unit) -> T |
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val is_active: T -> bool |
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val join: T -> unit |
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val interrupt: exn |
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val interrupt_exn: 'a Exn.result |
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val interrupt_self: unit -> 'a |
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val interrupt_other: T -> unit |
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end; |
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structure Isabelle_Thread: ISABELLE_THREAD = |
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struct |
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(* abstract type *) |
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78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
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abstype T = T of {thread: Thread.Thread.thread, name: string, id: int} |
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with |
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val make = T; |
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fun dest (T args) = args; |
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end; |
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val get_thread = #thread o dest; |
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val get_name = #name o dest; |
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val get_id = #id o dest; |
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78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
|
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val equal = Thread.Thread.equal o apply2 get_thread; |
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fun print t = |
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(case get_name t of "" => "ML" | a => "Isabelle." ^ a) ^ |
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"-" ^ string_of_int (get_id t); |
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(* self *) |
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val make_id = Counter.make (); |
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local |
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val self_var = Thread_Data.var () : T Thread_Data.var; |
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in |
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fun init_self args = |
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let val t = make args in Thread_Data.put self_var (SOME t); t end; |
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fun self () = |
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(case Thread_Data.get self_var of |
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SOME t => t |
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| NONE => init_self {thread = Thread.Thread.self (), name = "", id = make_id ()}); |
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fun is_self t = equal (t, self ()); |
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end; |
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(* fork *) |
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fun stack_limit () = |
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let |
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val threads_stack_limit = |
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Real.floor (Options.default_real "threads_stack_limit" * 1024.0 * 1024.0 * 1024.0); |
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in if threads_stack_limit <= 0 then NONE else SOME threads_stack_limit end; |
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type params = {name: string, stack_limit: int option, interrupts: bool}; |
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fun attributes ({stack_limit, interrupts, ...}: params) = |
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78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
|
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Thread.Thread.MaximumMLStack stack_limit :: |
64557
37074e22e8be
more tight thread attributes, based in internal word arithmetic instead of symbolic datatypes: measurable performance improvement;
wenzelm
parents:
62923
diff
changeset
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Thread_Attributes.convert_attributes |
37074e22e8be
more tight thread attributes, based in internal word arithmetic instead of symbolic datatypes: measurable performance improvement;
wenzelm
parents:
62923
diff
changeset
|
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(if interrupts then Thread_Attributes.public_interrupts else Thread_Attributes.no_interrupts); |
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explicit threads_stack_limit (for recent Poly/ML SVN versions), which leads to soft interrupt instead of exhaustion of virtual memory, which is particularly relevant for the bigger address space of x86_64;
wenzelm
parents:
59055
diff
changeset
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fun fork (params: params) body = |
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let |
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val self = Single_Assignment.var "self"; |
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fun main () = |
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let |
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val t = init_self {thread = Thread.Thread.self (), name = #name params, id = make_id ()}; |
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val _ = Single_Assignment.assign self t; |
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in body () end; |
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val _ = Thread.Thread.fork (main, attributes params); |
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in Single_Assignment.await self end; |
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(* join *) |
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78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
|
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val is_active = Thread.Thread.isActive o get_thread; |
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fun join t = |
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while is_active t |
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do OS.Process.sleep (seconds 0.1); |
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(* interrupts *) |
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val interrupt = Thread.Thread.Interrupt; |
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val interrupt_exn = Exn.Exn interrupt; |
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fun interrupt_self () = raise interrupt; |
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fun interrupt_other t = |
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78650
47d0c333d155
clarified signature: retain original Poly/ML names Thread.Thread, Thread.Mutex, Thread.ConditionVar and de-emphasize them for Isabelle/ML;
wenzelm
parents:
78648
diff
changeset
|
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Thread.Thread.interrupt (get_thread t) handle Thread.Thread _ => (); |
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end; |