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fix bug in CountUpAndDownLatch

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This commit is contained in:
Bixilon 2021-07-22 20:04:26 +02:00
parent 8a09f25fe8
commit 4b26398e90
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GPG Key ID: 5CAD791931B09AC4
1 changed files with 22 additions and 10 deletions
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32
src/main/java/de/bixilon/minosoft/util/CountUpAndDownLatch.kt
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@ -18,21 +18,27 @@ import de.bixilon.minosoft.util.KUtil.toSynchronizedList
class CountUpAndDownLatch @JvmOverloads constructor(count: Int, var parent: CountUpAndDownLatch? = null) {
private val lock = Object()
private val children: MutableSet<CountUpAndDownLatch> = mutableSetOf()
var count: Int = 0
private var rawCount = 0
set(value) {
val diff = value - field
check(value >= 0) { "Can not set count (previous=$rawCount, value=$value)" }
if (diff > 0) {
total += diff
}
field = value
}
var count: Int
get() {
synchronized(lock) {
return field
return rawCount
}
}
set(value) {
val diff: Int
synchronized(lock) {
diff = value - field
check(value >= 0) { "Can not set count (previous=$field, value=$value)" }
if (diff > 0) {
total += diff
}
field = value
diff = value - rawCount
rawCount = value
}
parent?.plus(diff) ?: notify()
}
@ -67,8 +73,11 @@ class CountUpAndDownLatch @JvmOverloads constructor(count: Int, var parent: Coun
@JvmOverloads
fun await(timeout: Long = 0L) {
while (count > 0) {
while (true) {
synchronized(lock) {
if (rawCount == 0) {
return
}
lock.wait(timeout)
}
}
@ -102,7 +111,10 @@ class CountUpAndDownLatch @JvmOverloads constructor(count: Int, var parent: Coun
}
fun plus(value: Int): CountUpAndDownLatch {
count += value
synchronized(lock) {
rawCount += value
}
parent?.plus(value) ?: notify()
return this
}