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annotate parallel_processing/ppb_cond_counter/ppb_cond_counter.c @ 16:57650a6829a1

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add some files in ppb_cond_counter
author Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
date Mon, 06 Jan 2014 15:52:00 +0900
parents parallel_processing/ppb_sem_counter/ppb_sem_counter.cc@08beb7bff036
children 4d8d124528f2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include <stdio.h>
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2 #include <pthread.h>
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3 #include <unistd.h>
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4 #include <semaphore.h>
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6 #define MAX_THREAD_NUM 2
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7 #define THREAD_NUM 5
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8
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9 sem_t sem;
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11 /**
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12 * Mavericks では clang が default となっているが、書籍自体は gcc でコンパイルしている。
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13 * クラスタ環境に gcc が存在していたので、そこでコンパイルすると望ましい動作結果が得られた。
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14 * clang では・・・どうするんだろ
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15 */
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16 void *
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17 thread_func(void *arg)
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18 {
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19 long id = (long)arg;
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21 /* starting semaphore and ending semaphore*/
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22 sem_wait(&sem);
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23 printf("Thread %ld started.\n", id);
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24 sleep(1);
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25 printf("Thread %ld finished.\n", id);
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26 sem_post(&sem);
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27 return 0;
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28 }
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30 int
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31 main()
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32 {
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33 pthread_t handle[THREAD_NUM];
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34 long i;
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36 /* initialize */
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37 sem_init(&sem, 0, MAX_THREAD_NUM);
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39 /* spawn thread a number of THREAD_NUM */
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40 for (i = 0; i < THREAD_NUM; ++i) pthread_create(&handle[i], NULL, &thread_func, (void*)i);
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42 /* wait for running all thread */
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43 for (i = 0; i < THREAD_NUM; ++i) pthread_join(handle[i], NULL);
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45 /* destroy mutex*/
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46 sem_destroy(&sem);
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48 return 0;
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49 }