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annotate example/many_task/ppe/QuickSort.cc @ 639:70c5c2d2eb24

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fix
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Thu, 19 Nov 2009 18:45:24 +0900
parents 60aa3f241b10
children f4d7cf77ec3d
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1 #include "QuickSort.h"
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2 #include <stdio.h>
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3 #include <string.h>
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4
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5 SchedDefineTask(QuickSort);
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6
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7 static void quick_sort( Data *data, int begin, int end ) ;
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8 static void swap( Data *data, int left, int right );
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9
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10 static int
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11 run(SchedTask *s, void* rbuff, void* wbuff) {
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12 // copy value
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13 int begin = 0;
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14 long end = (long)s->get_param(0);
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16 Data *r_data = (Data*)s->get_input(rbuff, 0);
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17 Data *w_data = (Data*)s->get_output(wbuff, 0);
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19 //printf("[PPE] Quick: length:%d addr->%x \n",end, (int*)rbuff);
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20 //printf("[PPE] Quick: data[0]: %d addr->%x\n",sizeof(r_data),r_data);
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21
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22 //show_data(r_data, end);
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23 quick_sort(r_data, begin, end-1);
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24 memcpy(w_data, r_data, sizeof(Data)*end);
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25
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26 return 0;
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27 }
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29 static void
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30 quick_sort( Data *data, int begin, int end ) {
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32 if (begin < end) {
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33 int where = (begin + end) / 2;
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34 int pivot = data[where].index;
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35 data[where].index = data[begin].index;
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36 int p = begin;
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37 int i;
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38 for (i=begin+1; i<=end; i++) {
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39 if (data[i].index < pivot) {
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40 p++;
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41 swap(data, p, i);
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42 }
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43 }
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44 data[begin].index = data[p].index;
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45 data[p].index = pivot;
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46
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47 quick_sort(data, begin, p-1);
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48 quick_sort(data, p+1, end);
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49 }
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50 }
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51
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52 static void
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53 swap( Data *data, int left, int right )
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54 {
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55 int tmp = data[left].index;
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56 data[left].index = data[right].index;
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57 data[right].index = tmp;
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58 }