rt-thread-official/examples/libc/ex1.c

38 lines
1.0 KiB
C

/* Creates two threads, one printing 10000 "a"s, the other printing
10000 "b"s.
Illustrates: thread creation, thread joining. */
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include "pthread.h"
static void *process(void * arg)
{
int i;
printf("Starting process %s\n", (char *)arg);
for (i = 0; i < 10000; i++)
write(1, (char *) arg, 1);
return NULL;
}
#define sucfail(r) (r != 0 ? "failed" : "succeeded")
int libc_ex1(void)
{
int pret, ret = 0;
pthread_t th_a, th_b;
void *retval;
ret += (pret = pthread_create(&th_a, NULL, process, (void *)"a"));
printf("create a %s %d\n", sucfail(pret), pret);
ret += (pret = pthread_create(&th_b, NULL, process, (void *)"b"));
printf("create b %s %d\n", sucfail(pret), pret);
ret += (pret = pthread_join(th_a, &retval));
printf("join a %s %d\n", sucfail(pret), pret);
ret += (pret = pthread_join(th_b, &retval));
printf("join b %s %d\n", sucfail(pret), pret);
return ret;
}
#include <finsh.h>
FINSH_FUNCTION_EXPORT(libc_ex1, example 1 for libc);