Function libc_ex7

examples/libc/ex7.c:69–107

}

int libc_ex7(void) {
    unsigned long count;

    setvbuf(stdout, NULL, _IONBF, 0);

    /* initialize main event cond var */
    pthread_cond_init(&main_event.cond, NULL);
    pthread_mutex_init(&main_event.mutex, NULL);
    main_event.flag = 0;

    for (count = 0; count < 20; ++count) {
        pthread_t thread;
        int status;

        /* pass down the milli-second timeout in the void* param */
        status = pthread_create(&thread, NULL, test_thread, (void*) (count
                * 100));
        if (status != 0) {
            printf("status = %d, count = %lu: %s\n", status, count, strerror(
                    errno));
            return 1;
        } else {

            /* wait for the event posted by the child thread */
            pthread_mutex_lock(&main_event.mutex);
            while (main_event.flag == 0) {
                pthread_cond_wait(&main_event.cond, &main_event.mutex);
            }
            main_event.flag = 0;
            pthread_mutex_unlock(&main_event.mutex);

            printf("count = %lu\n", count);
        }

        usleep(10);
    }

    return 0;
}
#include <finsh.h>
FINSH_FUNCTION_EXPORT(libc_ex7, example 7 for libc);