Mercurial > hg > Applications > Grep

comparison parallel_processing/chapter3/ppb_first_thread/ppb_first_thread.cc @ 22:508b47c8f4d8

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
package Chapter3
author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Tue, 07 Jan 2014 14:30:28 +0900
parents parallel_processing/ppb_first_thread/ppb_first_thread.cc@edf4445da580
children
comparison
equal deleted inserted replaced
21:d137f1823794 22:508b47c8f4d8
1 #include <stdio.h>
2 #include <pthread.h>
3
4 #define THREAD_NUM 2
5 #define DATA_NUM 10
6
7 typedef struct _thread_arg {
8 int thread_no;
9 int *data;
10 } thread_arg_t;
11
12 void *
13 thread_func(void *arg)
14 {
15 thread_arg_t *targ = (thread_arg_t *)arg;
16
17 for (int i = 0; i < DATA_NUM; i++) {
18 printf("thread%d : %d + 1 = %d\n",
19 targ->thread_no, targ->data[i], targ->data[i] + 1);
20 }
21 return 0;
22 }
23
24 int
25 main()
26 {
27 pthread_t handle[THREAD_NUM];
28 thread_arg_t targ[THREAD_NUM];
29 int data[DATA_NUM];
30 int i;
31
32 /* initialize */
33 for (i = 0; i < DATA_NUM; i++) data[i] = i;
34
35 /* spawn thread a number of THREAD_NUM */
36 for (i = 0; i < THREAD_NUM; i++) {
37 targ[i].thread_no = i;
38 targ[i].data = data;
39
40 /* spawn thread*/
41 pthread_create(&handle[i], NULL, &thread_func, (void*)&targ[i]);
42 }
43
44 /* wait for running all thread */
45 for (i = 0; i < THREAD_NUM; i++) pthread_join(handle[i], NULL);
46 return 0;
47 }