81 lines
2.4 KiB
Haxe
81 lines
2.4 KiB
Haxe
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/*
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* Copyright (C)2005-2019 Haxe Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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package sys.thread;
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#if (!target.threaded)
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#error "This class is not available on this target"
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#end
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/**
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A Lock allows blocking execution until it has been unlocked. It keeps track
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of how often `release` has been called, and blocks exactly as many `wait`
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calls.
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The order of the `release` and `wait` calls is irrelevant. That is, a Lock
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can be released before anyone waits for it. In that case, the `wait` call
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will execute immediately.
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Usage example:
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```haxe
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var lock = new Lock();
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var elements = [1, 2, 3];
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for (element in elements) {
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// Create one thread per element
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new Thread(function() {
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trace(element);
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Sys.sleep(1);
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// Release once per thread = 3 times
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lock.release();
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});
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}
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for (_ in elements) {
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// Wait 3 times
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lock.wait();
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}
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trace("All threads finished");
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```
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**/
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extern class Lock {
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/**
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Creates a new Lock which is initially locked.
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**/
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function new():Void;
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/**
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Waits for the lock to be released, or `timeout` (in seconds)
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to expire. Returns `true` if the lock is released and `false`
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if a time-out occurs.
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**/
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function wait(?timeout:Float):Bool;
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/**
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Releases the lock once.
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The thread does not need to own the lock in order to release
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it. Each call to `release` allows exactly one call to `wait`
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to execute.
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**/
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function release():Void;
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}
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