50 lines
1.9 KiB
OCaml
50 lines
1.9 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy and Damien Doligez, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the GNU Library General Public License, with *)
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(* the special exception on linking described in file ../../LICENSE. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(** Locks for mutual exclusion.
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Mutexes (mutual-exclusion locks) are used to implement critical sections
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and protect shared mutable data structures against concurrent accesses.
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The typical use is (if [m] is the mutex associated with the data structure
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[D]):
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{[
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Mutex.lock m;
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(* Critical section that operates over D *);
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Mutex.unlock m
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]}
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*)
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type t
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(** The type of mutexes. *)
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val create : unit -> t
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(** Return a new mutex. *)
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val lock : t -> unit
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(** Lock the given mutex. Only one thread can have the mutex locked
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at any time. A thread that attempts to lock a mutex already locked
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by another thread will suspend until the other thread unlocks
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the mutex. *)
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val try_lock : t -> bool
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(** Same as {!Mutex.lock}, but does not suspend the calling thread if
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the mutex is already locked: just return [false] immediately
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in that case. If the mutex is unlocked, lock it and
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return [true]. *)
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val unlock : t -> unit
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(** Unlock the given mutex. Other threads suspended trying to lock
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the mutex will restart. *)
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