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Make use of AtomicLongFieldUpdater.addAndGet(...) for cleaner code

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Motivation:

The code in ChannelOutboundBuffer can be simplified by using AtomicLongFieldUpdater.addAndGet(...)

Modification:

Replace our manual looping with AtomicLongFieldUpdater.addAndGet(...)

Result:

Cleaner code
This commit is contained in:
Norman Maurer 2014-06-17 18:02:41 +02:00
parent b627824b18
commit 917132e28d
1 changed files with 5 additions and 26 deletions
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31
transport/src/main/java/io/netty/channel/ChannelOutboundBuffer.java
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@ -206,16 +206,8 @@ public final class ChannelOutboundBuffer {
return;
}
long oldValue = totalPendingSize;
long newWriteBufferSize = oldValue + size;
while (!TOTAL_PENDING_SIZE_UPDATER.compareAndSet(this, oldValue, newWriteBufferSize)) {
oldValue = totalPendingSize;
newWriteBufferSize = oldValue + size;
}
int highWaterMark = channel.config().getWriteBufferHighWaterMark();
if (newWriteBufferSize > highWaterMark) {
long newWriteBufferSize = TOTAL_PENDING_SIZE_UPDATER.addAndGet(this, size);
if (newWriteBufferSize > channel.config().getWriteBufferHighWaterMark()) {
if (WRITABLE_UPDATER.compareAndSet(this, 1, 0)) {
channel.pipeline().fireChannelWritabilityChanged();
}
@ -234,16 +226,8 @@ public final class ChannelOutboundBuffer {
return;
}
long oldValue = totalPendingSize;
long newWriteBufferSize = oldValue - size;
while (!TOTAL_PENDING_SIZE_UPDATER.compareAndSet(this, oldValue, newWriteBufferSize)) {
oldValue = totalPendingSize;
newWriteBufferSize = oldValue - size;
}
int lowWaterMark = channel.config().getWriteBufferLowWaterMark();
if (newWriteBufferSize == 0 || newWriteBufferSize < lowWaterMark) {
long newWriteBufferSize = TOTAL_PENDING_SIZE_UPDATER.addAndGet(this, -size);
if (newWriteBufferSize == 0 || newWriteBufferSize < channel.config().getWriteBufferLowWaterMark()) {
if (WRITABLE_UPDATER.compareAndSet(this, 0, 1)) {
channel.pipeline().fireChannelWritabilityChanged();
}
@ -579,12 +563,7 @@ public final class ChannelOutboundBuffer {
// Just decrease; do not trigger any events via decrementPendingOutboundBytes()
int size = e.pendingSize;
long oldValue = totalPendingSize;
long newWriteBufferSize = oldValue - size;
while (!TOTAL_PENDING_SIZE_UPDATER.compareAndSet(this, oldValue, newWriteBufferSize)) {
oldValue = totalPendingSize;
newWriteBufferSize = oldValue - size;
}
TOTAL_PENDING_SIZE_UPDATER.addAndGet(this, -size);
e.pendingSize = 0;
if (!e.cancelled) {