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annotate parallel_processing/ppb_data_split/ppb_data_split.cc @ 9:fe8c1c25296a

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fix ppb_data_split
author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Fri, 03 Jan 2014 01:53:39 +0900
parents 645b93cbf36c
children
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1 #include <stdio.h>
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2 #include <pthread.h>
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4 #define THREAD_NUM 2
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5 #define DATA_NUM 10
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6 #define SPLIT_DATA_NUM (DATA_NUM / THREAD_NUM)
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8 typedef struct _thread_arg {
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9 int thread_no;
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10 int *data;
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11 } thread_arg_t;
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13 void *
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14 thread_func(void *arg)
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15 {
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16 thread_arg_t *targ = (thread_arg_t *)arg;
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18 for (int i = 0; i < SPLIT_DATA_NUM; i++) {
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19 printf("thread%d : %d + 1 = %d\n",
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20 targ->thread_no, targ->data[i], targ->data[i] + 1);
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21 }
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22 return 0;
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23 }
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25 int
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26 main()
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27 {
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28 pthread_t handle[THREAD_NUM];
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29 thread_arg_t targ[THREAD_NUM];
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30 int data[DATA_NUM];
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31 int i;
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33 /* initialize */
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34 for (i = 0; i < DATA_NUM; i++) data[i] = i;
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36 /* spawn thread a number of THREAD_NUM */
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37 for (i = 0; i < THREAD_NUM; i++) {
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38 targ[i].thread_no = i;
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40 /* divide a data into THREAD_NUM*/
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41 targ[i].data = &data[SPLIT_DATA_NUM * i];
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42 /* spawn thread*/
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43 pthread_create(&handle[i], NULL, &thread_func, (void*)&targ[i]);
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44 }
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46 /* wait for running all thread */
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47 for (i = 0; i < THREAD_NUM; i++) pthread_join(handle[i], NULL);
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48 return 0;
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49 }