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Use byte padding to avoid fields re-ordering on JDK 15 and above #3168

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merged 12 commits into from
Aug 29, 2022
Merged

Use byte padding to avoid fields re-ordering on JDK 15 and above #3168

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9a0f4ff
Replace 'long' padding by 'byte' padding to avoid re-ordering on mode…
lantalex Aug 24, 2022
65747a9
Update license header
lantalex Aug 25, 2022
fc14627
Replace 'long' padding for QueueDrainSubscriber
lantalex Aug 26, 2022
f381459
Replace the QueueDrainSubscriber#objectLayout() test with the simplif…
lantalex Aug 26, 2022
f23ab52
Use 'pad' prefix for padding field names
lantalex Aug 26, 2022
0eba668
Add object layout test for SpscArrayQueue
lantalex Aug 26, 2022
3d8ef21
Extend padding for QueueDrainSubscriber + update test
lantalex Aug 28, 2022
ab0fa1d
Making SpscArrayQueue internal padding consistent for actual versions…
lantalex Aug 28, 2022
c58af9d
Fix alignment
lantalex Aug 29, 2022
915a8b4
Add `unused` annotation for padding fields
lantalex Aug 29, 2022
4420d41
Add `unused` annotation for padding fields
lantalex Aug 29, 2022
463c559
Remove unnecessary `public` modifier
lantalex Aug 29, 2022
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62 changes: 52 additions & 10 deletions reactor-core/src/main/java/reactor/util/concurrent/SpscArrayQueue.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2021 VMware Inc. or its affiliates, All Rights Reserved.
* Copyright (c) 2016-2022 VMware Inc. or its affiliates, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
Expand Down Expand Up @@ -178,9 +178,23 @@ public SpscArrayQueueCold(int length) {
class SpscArrayQueueP1<T> extends SpscArrayQueueCold<T> {
/** */
private static final long serialVersionUID = -4461305682174876914L;

long p00, p01, p02, p03, p04, p05, p06, p07;
long p08, p09, p0A, p0B, p0C, p0D, p0E;

byte b000,b001,b002,b003,b004,b005,b006,b007;// 8b
byte b010,b011,b012,b013,b014,b015,b016,b017;// 16b
byte b020,b021,b022,b023,b024,b025,b026,b027;// 24b
byte b030,b031,b032,b033,b034,b035,b036,b037;// 32b
byte b040,b041,b042,b043,b044,b045,b046,b047;// 40b
byte b050,b051,b052,b053,b054,b055,b056,b057;// 48b
byte b060,b061,b062,b063,b064,b065,b066,b067;// 56b
byte b070,b071,b072,b073,b074,b075,b076,b077;// 64b
byte b100,b101,b102,b103,b104,b105,b106,b107;// 72b
byte b110,b111,b112,b113,b114,b115,b116,b117;// 80b
byte b120,b121,b122,b123,b124,b125,b126,b127;// 88b
byte b130,b131,b132,b133,b134,b135,b136,b137;// 96b
byte b140,b141,b142,b143,b144,b145,b146,b147;//104b
byte b150,b151,b152,b153,b154,b155,b156,b157;//112b
byte b160,b161,b162,b163,b164,b165,b166,b167;//120b
byte b170,b171,b172,b173,b174,b175,b176,b177;//128b

SpscArrayQueueP1(int length) {
super(length);
Expand All @@ -206,9 +220,23 @@ class SpscArrayQueueProducer<T> extends SpscArrayQueueP1<T> {
class SpscArrayQueueP2<T> extends SpscArrayQueueProducer<T> {
/** */
private static final long serialVersionUID = -5400235061461013116L;

long p00, p01, p02, p03, p04, p05, p06, p07;
long p08, p09, p0A, p0B, p0C, p0D, p0E;

byte b000,b001,b002,b003,b004,b005,b006,b007;// 8b
byte b010,b011,b012,b013,b014,b015,b016,b017;// 16b
byte b020,b021,b022,b023,b024,b025,b026,b027;// 24b
byte b030,b031,b032,b033,b034,b035,b036,b037;// 32b
byte b040,b041,b042,b043,b044,b045,b046,b047;// 40b
byte b050,b051,b052,b053,b054,b055,b056,b057;// 48b
byte b060,b061,b062,b063,b064,b065,b066,b067;// 56b
byte b070,b071,b072,b073,b074,b075,b076,b077;// 64b
byte b100,b101,b102,b103,b104,b105,b106,b107;// 72b
byte b110,b111,b112,b113,b114,b115,b116,b117;// 80b
byte b120,b121,b122,b123,b124,b125,b126,b127;// 88b
byte b130,b131,b132,b133,b134,b135,b136,b137;// 96b
byte b140,b141,b142,b143,b144,b145,b146,b147;//104b
byte b150,b151,b152,b153,b154,b155,b156,b157;//112b
byte b160,b161,b162,b163,b164,b165,b166,b167;//120b
byte b170,b171,b172,b173,b174,b175,b176,b177;//128b

SpscArrayQueueP2(int length) {
super(length);
Expand All @@ -234,9 +262,23 @@ class SpscArrayQueueConsumer<T> extends SpscArrayQueueP2<T> {
class SpscArrayQueueP3<T> extends SpscArrayQueueConsumer<T> {
/** */
private static final long serialVersionUID = -2684922090021364171L;

long p00, p01, p02, p03, p04, p05, p06, p07;
long p08, p09, p0A, p0B, p0C, p0D, p0E;

byte b000,b001,b002,b003,b004,b005,b006,b007;// 8b
byte b010,b011,b012,b013,b014,b015,b016,b017;// 16b
byte b020,b021,b022,b023,b024,b025,b026,b027;// 24b
byte b030,b031,b032,b033,b034,b035,b036,b037;// 32b
byte b040,b041,b042,b043,b044,b045,b046,b047;// 40b
byte b050,b051,b052,b053,b054,b055,b056,b057;// 48b
byte b060,b061,b062,b063,b064,b065,b066,b067;// 56b
byte b070,b071,b072,b073,b074,b075,b076,b077;// 64b
byte b100,b101,b102,b103,b104,b105,b106,b107;// 72b
byte b110,b111,b112,b113,b114,b115,b116,b117;// 80b
byte b120,b121,b122,b123,b124,b125,b126,b127;// 88b
byte b130,b131,b132,b133,b134,b135,b136,b137;// 96b
byte b140,b141,b142,b143,b144,b145,b146,b147;//104b
byte b150,b151,b152,b153,b154,b155,b156,b157;//112b
byte b160,b161,b162,b163,b164,b165,b166,b167;//120b
byte b170,b171,b172,b173,b174,b175,b176,b177;//128b

SpscArrayQueueP3(int length) {
super(length);
Expand Down