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annotate example/many_task/ppe/QuickSort.cc @ 945:9ed1c4a877ca draft

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sort example fix ( simple task accepts one param and more compatible with old task)
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sun, 01 Aug 2010 19:29:27 +0900
parents e01b551f25d6
children 7823233584da
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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
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9 static void
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10 swap( Data *data, int left, int right )
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11 {
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12 Data tmp = data[left];
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13 data[left] = data[right];
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14 data[right] = tmp;
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15 }
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16
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17 // #define USE_MEMCPY
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18
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19 static int
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20 run(SchedTask *s, void* rbuff, void* wbuff) {
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21 // copy value
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22 int begin = 0;
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23 #if USE_SIMPLE_TASK
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24 int end = s->read_size()/sizeof(Data);
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25 Data *r_data = (Data*)rbuff;
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26 #ifdef USE_MEMCPY
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27 Data *w_data = (Data*)wbuff;
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28 #endif
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29 #else
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30 int end = s->get_inputSize(0)/sizeof(Data);
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31 DataPtr r_data = (DataPtr)s->get_input(0);
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32 #ifdef USE_MEMCPY
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33 DataPtr w_data = (DataPtr)s->get_output(0);
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34 #endif
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35 #endif
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36
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37 // printf("[PPE] Quick: length:%d addr->%x \n",end, (int)rbuff);
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38 //printf("[PPE] Quick: data[0]: %d addr->%x\n",sizeof(r_data),r_data);
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40 //show_data(r_data, end);
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41 quick_sort(r_data, begin, end-1);
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42 #ifdef USE_MEMCPY
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43 memcpy(w_data, r_data, sizeof(Data)*end);
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44 #else
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45 s->swap();
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46 #endif
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47
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48 return 0;
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49 }
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50
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51 static void
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52 quick_sort( Data *data, int begin, int end ) {
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54 if (begin < end) {
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55 int where = (begin + end) / 2;
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56 int pivot = data[where].index;
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57 data[where].index = data[begin].index;
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58 int p = begin;
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59 int i;
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60 for (i=begin+1; i<=end; i++) {
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61 if (data[i].index < pivot) {
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62 p++;
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63 swap(data, p, i);
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64 }
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65 }
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66 data[begin].index = data[p].index;
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67 data[p].index = pivot;
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68
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69 quick_sort(data, begin, p-1);
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70 quick_sort(data, p+1, end); // tail call
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71 }
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72 }
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74
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75 /* end */