|
|
Java example source code file (ArraysParallelSortHelpers.java)
This example Java source code file (ArraysParallelSortHelpers.java) is included in the alvinalexander.com
"Java Source Code
Warehouse" project. The intent of this project is to help you "Learn
Java by Example" TM.
Learn more about this Java project at its project page.
The ArraysParallelSortHelpers.java Java example source code
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util;
import java.util.concurrent.RecursiveAction;
import java.util.concurrent.CountedCompleter;
/**
* Helper utilities for the parallel sort methods in Arrays.parallelSort.
*
* For each primitive type, plus Object, we define a static class to
* contain the Sorter and Merger implementations for that type:
*
* Sorter classes based mainly on CilkSort
* <A href="http://supertech.lcs.mit.edu/cilk/"> Cilk:
* Basic algorithm:
* if array size is small, just use a sequential quicksort (via Arrays.sort)
* Otherwise:
* 1. Break array in half.
* 2. For each half,
* a. break the half in half (i.e., quarters),
* b. sort the quarters
* c. merge them together
* 3. merge together the two halves.
*
* One reason for splitting in quarters is that this guarantees that
* the final sort is in the main array, not the workspace array.
* (workspace and main swap roles on each subsort step.) Leaf-level
* sorts use the associated sequential sort.
*
* Merger classes perform merging for Sorter. They are structured
* such that if the underlying sort is stable (as is true for
* TimSort), then so is the full sort. If big enough, they split the
* largest of the two partitions in half, find the greatest point in
* smaller partition less than the beginning of the second half of
* larger via binary search; and then merge in parallel the two
* partitions. In part to ensure tasks are triggered in
* stability-preserving order, the current CountedCompleter design
* requires some little tasks to serve as place holders for triggering
* completion tasks. These classes (EmptyCompleter and Relay) don't
* need to keep track of the arrays, and are never themselves forked,
* so don't hold any task state.
*
* The primitive class versions (FJByte... FJDouble) are
* identical to each other except for type declarations.
*
* The base sequential sorts rely on non-public versions of TimSort,
* ComparableTimSort, and DualPivotQuicksort sort methods that accept
* temp workspace array slices that we will have already allocated, so
* avoids redundant allocation. (Except for DualPivotQuicksort byte[]
* sort, that does not ever use a workspace array.)
*/
/*package*/ class ArraysParallelSortHelpers {
/*
* Style note: The task classes have a lot of parameters, that are
* stored as task fields and copied to local variables and used in
* compute() methods, We pack these into as few lines as possible,
* and hoist consistency checks among them before main loops, to
* reduce distraction.
*/
/**
* A placeholder task for Sorters, used for the lowest
* quartile task, that does not need to maintain array state.
*/
static final class EmptyCompleter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
EmptyCompleter(CountedCompleter<?> p) { super(p); }
public final void compute() { }
}
/**
* A trigger for secondary merge of two merges
*/
static final class Relay extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final CountedCompleter<?> task;
Relay(CountedCompleter<?> task) {
super(null, 1);
this.task = task;
}
public final void compute() { }
public final void onCompletion(CountedCompleter<?> t) {
task.compute();
}
}
/** Object + Comparator support class */
static final class FJObject {
static final class Sorter<T> extends CountedCompleter {
static final long serialVersionUID = 2446542900576103244L;
final T[] a, w;
final int base, size, wbase, gran;
Comparator<? super T> comparator;
Sorter(CountedCompleter<?> par, T[] a, T[] w, int base, int size,
int wbase, int gran,
Comparator<? super T> comparator) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
this.comparator = comparator;
}
public final void compute() {
CountedCompleter<?> s = this;
Comparator<? super T> c = this.comparator;
T[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger<T>(s, w, a, wb, h,
wb+h, n-h, b, g, c));
Relay rc = new Relay(new Merger<T>(fc, a, w, b+h, q,
b+u, n-u, wb+h, g, c));
new Sorter<T>(rc, a, w, b+u, n-u, wb+u, g, c).fork();
new Sorter<T>(rc, a, w, b+h, q, wb+h, g, c).fork();;
Relay bc = new Relay(new Merger<T>(fc, a, w, b, q,
b+q, h-q, wb, g, c));
new Sorter<T>(bc, a, w, b+q, h-q, wb+q, g, c).fork();
s = new EmptyCompleter(bc);
n = q;
}
TimSort.sort(a, b, b + n, c, w, wb, n);
s.tryComplete();
}
}
static final class Merger<T> extends CountedCompleter {
static final long serialVersionUID = 2446542900576103244L;
final T[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Comparator<? super T> comparator;
Merger(CountedCompleter<?> par, T[] a, T[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran,
Comparator<? super T> comparator) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
this.comparator = comparator;
}
public final void compute() {
Comparator<? super T> c = this.comparator;
T[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0 ||
c == null)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
T split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (c.compare(split, a[rm + rb]) <= 0)
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
T split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (c.compare(split, a[lm + lb]) <= 0)
lh = lm;
else
lo = lm + 1;
}
}
Merger<T> m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g, c);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
T t, al, ar;
if (c.compare((al = a[lb]), (ar = a[rb])) <= 0) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJObject
/** byte support class */
static final class FJByte {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final byte[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, byte[] a, byte[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
byte[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final byte[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, byte[] a, byte[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
byte[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
byte split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
byte split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
byte t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJByte
/** char support class */
static final class FJChar {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final char[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, char[] a, char[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
char[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final char[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, char[] a, char[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
char[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
char split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
char split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
char t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJChar
/** short support class */
static final class FJShort {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final short[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, short[] a, short[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
short[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final short[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, short[] a, short[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
short[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
short split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
short split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
short t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJShort
/** int support class */
static final class FJInt {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final int[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, int[] a, int[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
int[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final int[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, int[] a, int[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
int[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
int split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
int split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
int t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJInt
/** long support class */
static final class FJLong {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final long[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, long[] a, long[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
long[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final long[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, long[] a, long[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
long[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
long split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
long split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
long t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJLong
/** float support class */
static final class FJFloat {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final float[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, float[] a, float[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
float[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final float[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, float[] a, float[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
float[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
float split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
float split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
float t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJFloat
/** double support class */
static final class FJDouble {
static final class Sorter extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final double[] a, w;
final int base, size, wbase, gran;
Sorter(CountedCompleter<?> par, double[] a, double[] w, int base,
int size, int wbase, int gran) {
super(par);
this.a = a; this.w = w; this.base = base; this.size = size;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
CountedCompleter<?> s = this;
double[] a = this.a, w = this.w; // localize all params
int b = this.base, n = this.size, wb = this.wbase, g = this.gran;
while (n > g) {
int h = n >>> 1, q = h >>> 1, u = h + q; // quartiles
Relay fc = new Relay(new Merger(s, w, a, wb, h,
wb+h, n-h, b, g));
Relay rc = new Relay(new Merger(fc, a, w, b+h, q,
b+u, n-u, wb+h, g));
new Sorter(rc, a, w, b+u, n-u, wb+u, g).fork();
new Sorter(rc, a, w, b+h, q, wb+h, g).fork();;
Relay bc = new Relay(new Merger(fc, a, w, b, q,
b+q, h-q, wb, g));
new Sorter(bc, a, w, b+q, h-q, wb+q, g).fork();
s = new EmptyCompleter(bc);
n = q;
}
DualPivotQuicksort.sort(a, b, b + n - 1, w, wb, n);
s.tryComplete();
}
}
static final class Merger extends CountedCompleter<Void> {
static final long serialVersionUID = 2446542900576103244L;
final double[] a, w; // main and workspace arrays
final int lbase, lsize, rbase, rsize, wbase, gran;
Merger(CountedCompleter<?> par, double[] a, double[] w,
int lbase, int lsize, int rbase,
int rsize, int wbase, int gran) {
super(par);
this.a = a; this.w = w;
this.lbase = lbase; this.lsize = lsize;
this.rbase = rbase; this.rsize = rsize;
this.wbase = wbase; this.gran = gran;
}
public final void compute() {
double[] a = this.a, w = this.w; // localize all params
int lb = this.lbase, ln = this.lsize, rb = this.rbase,
rn = this.rsize, k = this.wbase, g = this.gran;
if (a == null || w == null || lb < 0 || rb < 0 || k < 0)
throw new IllegalStateException(); // hoist checks
for (int lh, rh;;) { // split larger, find point in smaller
if (ln >= rn) {
if (ln <= g)
break;
rh = rn;
double split = a[(lh = ln >>> 1) + lb];
for (int lo = 0; lo < rh; ) {
int rm = (lo + rh) >>> 1;
if (split <= a[rm + rb])
rh = rm;
else
lo = rm + 1;
}
}
else {
if (rn <= g)
break;
lh = ln;
double split = a[(rh = rn >>> 1) + rb];
for (int lo = 0; lo < lh; ) {
int lm = (lo + lh) >>> 1;
if (split <= a[lm + lb])
lh = lm;
else
lo = lm + 1;
}
}
Merger m = new Merger(this, a, w, lb + lh, ln - lh,
rb + rh, rn - rh,
k + lh + rh, g);
rn = rh;
ln = lh;
addToPendingCount(1);
m.fork();
}
int lf = lb + ln, rf = rb + rn; // index bounds
while (lb < lf && rb < rf) {
double t, al, ar;
if ((al = a[lb]) <= (ar = a[rb])) {
lb++; t = al;
}
else {
rb++; t = ar;
}
w[k++] = t;
}
if (rb < rf)
System.arraycopy(a, rb, w, k, rf - rb);
else if (lb < lf)
System.arraycopy(a, lb, w, k, lf - lb);
tryComplete();
}
}
} // FJDouble
}
Other Java examples (source code examples)
Here is a short list of links related to this Java ArraysParallelSortHelpers.java source code file:
|
The search page
Other Java source code examples at this package level
Click here to learn more about this project
