1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
/*
* 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;
import java.Lib;
import java.lang.System;
using haxe.Int64;
@:coreApi
@:native('haxe.java.vm.Lock') class Lock {
@:private @:volatile var releasedCount = 0;
public function new() {}
public function wait(?timeout:Float):Bool {
var ret = false;
java.Lib.lock(this, {
if (--releasedCount < 0) {
if (timeout == null) {
// since .notify() is asynchronous, this `while` is needed
// because there is a very remote possibility of release() awaking a thread,
// but before it releases, another thread calls wait - and since the release count
// is still positive, it will get the lock.
while (releasedCount < 0) {
try {
(cast this : java.lang.Object).wait();
} catch (e:java.lang.InterruptedException) {}
}
} else {
var timeout:haxe.Int64 = cast timeout * 1000;
var cur = System.currentTimeMillis(),
max = cur.add(timeout);
// see above comment about this while loop
while (releasedCount < 0 && cur.compare(max) < 0) {
try {
var t = max.sub(cur);
(cast this : java.lang.Object).wait(t);
cur = System.currentTimeMillis();
} catch (e:java.lang.InterruptedException) {}
}
}
}
ret = this.releasedCount >= 0;
if (!ret)
this.releasedCount++; // timed out
});
return ret;
}
public function release():Void {
untyped __lock__(this, {
if (++releasedCount >= 0) {
untyped this.notify();
}
});
}
}
|
