1 #include <assert.h>
2 #include <stdlib.h>
3 #include <stdio.h>
4 #include <string.h>
5 #include <unistd.h>
6 #include <inttypes.h>
7 #include <pthread.h>
8 #include <sys/wait.h>
9 #include <sched.h>
10
checked_write(int fd,const void * buf,size_t count)11 void checked_write(int fd, const void *buf, size_t count)
12 {
13 ssize_t rc = write(fd, buf, count);
14 assert(rc == count);
15 }
16
thread1_func(void * arg)17 void *thread1_func(void *arg)
18 {
19 int i;
20 char buf[512];
21
22 for(i=0;i<10;i++) {
23 snprintf(buf, sizeof(buf), "thread1: %d %s\n", i, (char *)arg);
24 checked_write(1, buf, strlen(buf));
25 usleep(100 * 1000);
26 }
27 return NULL;
28 }
29
thread2_func(void * arg)30 void *thread2_func(void *arg)
31 {
32 int i;
33 char buf[512];
34 for(i=0;i<20;i++) {
35 snprintf(buf, sizeof(buf), "thread2: %d %s\n", i, (char *)arg);
36 checked_write(1, buf, strlen(buf));
37 usleep(150 * 1000);
38 }
39 return NULL;
40 }
41
test_pthread(void)42 void test_pthread(void)
43 {
44 pthread_t tid1, tid2;
45
46 pthread_create(&tid1, NULL, thread1_func, "hello1");
47 pthread_create(&tid2, NULL, thread2_func, "hello2");
48 pthread_join(tid1, NULL);
49 pthread_join(tid2, NULL);
50 printf("End of pthread test.\n");
51 }
52
main(int argc,char ** argv)53 int main(int argc, char **argv)
54 {
55 test_pthread();
56 return 0;
57 }
58