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Kha/Tools/linux_arm64/std/sys/thread/Lock.hx

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