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/* Test libuEv event library
*
* Copyright (c) 2012 Flemming Madsen <flemming!madsen()madsensoft!dk>
* Copyright (c) 2013-2024 Joachim Wiberg <troglobit()gmail!com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "check.h"
#include <signal.h>
typedef struct {
int counter;
} my_t;
static int in, out;
static int period = 0;
static uev_t *watchdog;
static void lifetime_cb(uev_t *w, void *arg, int events)
{
if (UEV_ERROR == events)
fprintf(stderr, "timer watcher failed, ignoring ...\n");
fprintf(stderr, "\nLifetime exceeded, program completed successfully! (arg:%p)\n", arg);
uev_exit(w->ctx);
}
/* The pipe watchdog, if it triggers we haven't received data in time. */
static void timeout_cb(uev_t *w, void *arg, int events)
{
if (UEV_ERROR == events)
fprintf(stderr, "timer watcher failed, ignoring ...\n");
watchdog = NULL;
fprintf(stderr, "\nTimeout exceeded %p\n", arg);
// uev_timer_stop(w); <-- No need to stop timers with period=0 :)
uev_exit(w->ctx);
}
static void periodic_task(uev_t *w, void *arg, int events)
{
fprintf(stderr, "|");
}
static void signal_cb(uev_t *w, void *arg, int events)
{
if (UEV_ERROR == events) {
fprintf(stderr, "Signal watcher failed, unrecoverable error.\n");
return;
}
fprintf(stderr, w->signo == SIGINT ? "^Cv" : "^\v");
}
static void pipe_read_cb(uev_t *w, void *arg, int events)
{
int len;
char msg[50];
if (UEV_ERROR == events) {
error:
fprintf(stderr, "pipe watcher failed, restarting ...\n");
uev_io_start(w);
return;
}
/* Kick watchdog */
if (watchdog)
uev_timer_set(watchdog, 1000, 0);
/* Here we can read() from in or w->fd, either works. */
len = read(w->fd, msg, sizeof(msg));
if (len < 0) {
perror(__func__);
goto error;
}
if (len == 0 || UEV_HUP == events) {
fprintf(stderr, "Other end of pipe closed, no more data\n");
return;
}
// fprintf(stderr, "READ %.*s %d\n", len, msg, len);
fprintf(stderr, "%.*s.%d ", len, msg, len);
}
static void pipe_write_cb(uev_t *w, void *arg, int events)
{
my_t *my = arg;
char *msg = "TESTING";
if (UEV_ERROR == events)
fprintf(stderr, "timer watcher failed, ignoring ...\n");
/* Here we *must* use out, not w->fd, since we're a timer callback */
if (write(out, msg, my->counter) < 0) {
perror("\nFailed writing to pipe");
return;
}
// fprintf(stderr, "WRITE %.*s %d\n", my->counter, msg, my->counter);
fprintf(stderr, "%d ", my->counter);
period = my->counter + 5;
my->counter++;
uev_timer_set(w, period * 100, 0);
}
int main(void)
{
int fd[2];
my_t my = { .counter = 1 };
uev_t timeout, wdt, periodic, writer, reader, sigint_watcher, sigquit_watcher;
uev_ctx_t ctx;
/* Work load, one timer callback writes to a pipe periodically,
* and one I/O watcher that is called every time the pipe has
* some data. */
if (pipe(fd) < 0)
return 1;
/* Initialize libuEv */
uev_init(&ctx);
/* Signal watchers, Ctrl-C => SIGINT, Ctrl-\ => SIGQUIT */
uev_signal_init(&ctx, &sigint_watcher, signal_cb, NULL, SIGINT);
uev_signal_init(&ctx, &sigquit_watcher, signal_cb, NULL, SIGQUIT);
/* Total program execution time */
uev_timer_init(&ctx, &timeout, lifetime_cb, (void *)(intptr_t)2, 4000, 0);
/* Main pipe worker and consumer */
in = fd[0];
out = fd[1];
uev_io_init(&ctx, &reader, pipe_read_cb, NULL, in, UEV_READ);
uev_timer_init(&ctx, &writer, pipe_write_cb, &my, 400, 0);
/*
* Watchdog for the above timer callback, if it doesn't wake up
* and write to the pipe within a given deadline it will bark.
*/
uev_timer_init(&ctx, &wdt, timeout_cb, (void *)(intptr_t)1, 950, 0);
watchdog = &wdt;
/* Periodic background task */
uev_timer_init(&ctx, &periodic, periodic_task, NULL, 200, 200);
/* Start event loop */
uev_run(&ctx, 0);
fprintf(stderr, "Period is %d must be 10: %s\n", period, 10 == period ? "OK" : "ERROR!");
fail_unless(10 == period);
return 0;
}
/**
* Local Variables:
* indent-tabs-mode: t
* c-file-style: "linux"
* End:
*/
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