109 строки
2.5 KiB
C
109 строки
2.5 KiB
C
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#include <event2/event.h>
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#include <event2/event_struct.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <stdbool.h>
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#define SIGPRI 0
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#define TERMPRI 1
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static struct event_base *base;
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static bool run=true;
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static int loops=0;
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static void
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cbfunc(evutil_socket_t fd, short what, void *arg)
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{
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fprintf(stderr, "CAUGHT SIGNAL\n");
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fflush(stderr);
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#if 0
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event_base_loopbreak(base);
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#endif
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run = false;
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}
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static void
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die(const char *msg)
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{
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fprintf(stderr, "%s\n", msg);
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fflush(stderr);
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exit(1);
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}
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static void
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t1func(evutil_socket_t fd, short what, void *arg)
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{
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struct event *t1 = (struct event*)arg;
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struct event *t2;
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fprintf(stderr, "CAUGHT EVENT\n");
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fflush(stderr);
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event_del(t1);
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free(t1);
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loops++;
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if (loops < 10) {
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t2 = (struct event*)malloc(sizeof(struct event));
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if (event_assign(t2, base, -1, EV_WRITE, t1func, t2) < 0) {
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die("event_assign_term");
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}
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if (event_priority_set(t2, TERMPRI) < 0) {
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die("event_priority_set_term");
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}
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fprintf(stderr, "EVENT %d DEFINED\n", loops);
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fflush(stderr);
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event_active(t2, EV_WRITE, 1);
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fprintf(stderr, "EVENT %d ACTIVATED\n", loops);
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fflush(stderr);
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}
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}
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int
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main(int argc, char **argv)
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{
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struct event ev;
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struct event *t1;
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event_enable_debug_mode();
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fprintf(stderr, "Libevent %s\n", event_get_version());
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fflush(stderr);
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if (!(base = event_base_new()))
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die("event_base_new");
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if (event_base_priority_init(base, 8) < 0)
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die("event_base_priority_init");
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if (event_assign(&ev, base, SIGTERM, EV_SIGNAL|EV_PERSIST, cbfunc, NULL)<0)
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die("event_assign");
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if (event_priority_set(&ev, SIGPRI) < 0)
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die("event_priority_set");
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if (event_add(&ev, NULL) < 0)
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die("event_add");
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fprintf(stderr, "SIGNAL EVENT DEFINED\n");
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fflush(stderr);
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t1 = (struct event*)malloc(sizeof(struct event));
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if (event_assign(t1, base, -1, EV_WRITE, t1func, t1) < 0) {
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die("event_assign_term");
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}
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if (event_priority_set(t1, TERMPRI) < 0) {
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die("event_priority_set_term");
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}
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event_active(t1, EV_WRITE, 1);
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fprintf(stderr, "FIRST TERMINATION EVENT DEFINED\n");
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fflush(stderr);
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/* event_dispatch(base); */
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while (run) {
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event_base_loop(base, EVLOOP_ONCE);
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}
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fprintf(stderr, "EXITED LOOP - FREEING BASE\n");
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fflush(stderr);
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event_base_free(base);
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return 0;
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}
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