1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <pthread.h>
4
5 #include "common.h"
6 #include "common_threads.h"
7
8 void *mythread(void *arg) {
9 printf("%s\n", (char *) arg);
10 return NULL;
11 }
12
13 int main(int argc, char *argv[]) {
14 if (argc != 1) {
15 fprintf(stderr, "usage: main\n");
16 exit(1);
17 }
18
19 pthread_t p1, p2;
20 printf("main: begin\n");
21 printf( "main: creating T1\n");
22 Pthread_create(&p1, NULL, mythread, "A");
23 printf( "main: creating T2\n");
24 Pthread_create(&p2, NULL, mythread, "B");
25 // join waits for the threads to finish
26 printf( "main: waiting for T1\n");
27 Pthread_join(p1, NULL);
28 printf( "main: waiting for T2\n");
29 Pthread_join(p2, NULL);
30 printf("main: end\n");
31 return 0;
32 }
Figure 26.2: Simple Thread Creation Code (t0.c) (updated)
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$ ./t0
main: begin
main: creating T1
main: creating T2
main: waiting for T1
A
B
main: waiting for T2
main: end
$ ./t0
main: begin
main: creating T1
main: creating T2
A
main: waiting for T1
main: waiting for T2
B
main: end
$ ./t0
main: begin
main: creating T1
main: creating T2
A
main: waiting for T1
B
main: waiting for T2
main: end
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