minimal_tevent.c

#include <tevent.h>
#include <stdio.h>
#include <unistd.h>

static void timer_cb(struct tevent_context *c, struct tevent_timer *e,
                     struct timeval ct, void *data) {
    printf("[timer_cb]; error!\n");
    exit(-1);
}

static void error_cb(struct tevent_context *c, struct tevent_fd *e,
                     uint16_t fl, void *data) {
    printf("blue skied an' clear\n");
    exit(0);
}

int main() {
    int ret, fds[2];
    struct tevent_context *c;
    struct timeval tv;
    struct tevent_timer *timer;
    struct tevent_fd *tfd;
    
    fds[0] = -1;
    fds[1] = -1;

    ret = pipe(fds);
    if (ret != 0) {
        printf("pipe\n");
        exit(-1);
    }

    c = tevent_context_init(NULL);
    if (!c) {
        printf("tevent_context_init\n");
        exit(-1);
    }

    tv = tevent_timeval_current_ofs(1, 1000);
    timer = tevent_add_timer(c, c, tv, timer_cb, (void *) c);
    if (!timer) {
        printf("tevent_add_timer\n");
        exit(-1);
    }

    close(fds[0]);
    fds[0] = -1;

    tfd = tevent_add_fd(c, c, fds[1], 0, error_cb, (void *) c);
    if (!tfd) {
        printf("tevent_add_fd\n");
        exit(-1);
    }
    tevent_fd_set_flags(tfd, TEVENT_FD_WRITE);

    while (1) {
        printf("[tevent_loop_once]\n");
        ret = tevent_loop_once(c);
        if (ret) {
            printf("tevent_loop_once\n");
            exit(-1);
        }
    }

    return -1;
}