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 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 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 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 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 53 int main(int argc, char **argv) 54 { 55 test_pthread(); 56 return 0; 57 } 58