mirror of
https://github.com/troglobit/libuev.git
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Joachim Nilsson
499cbd2032
This is a major refactor of the original design by Flemming Madsen. It converts the library timers from poll() to timerfd, which at the same time also unifies the file and timer watchers into one design. The idea is to also add signalfd to the mix later on. Also a couple of hundred kilobytes smaller, although size a secondary goal. The primary goal is to further simplify the internal design and to continuously strive to employ modern APIs. Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/* Test libuev event library
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*
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* Copyright (c) 2012 Flemming Madsen <flemming!madsen()madsensoft!dk>
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* Copyright (c) 2013 Joachim Nilsson <troglobit()gmail!com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h> /* intptr_t */
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#include "libuev/uev.h"
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static int in, out;
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static int period = 0;
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static uev_io_t *timer = NULL;
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static void lifetime_cb(uev_t *ctx, uev_io_t *w __attribute__ ((unused)), void *data)
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{
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fprintf(stderr, "\nLifetime exceeded %p\n", data);
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uev_exit(ctx);
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}
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/* The pipe watchdog, if it triggers we haven't received data in time. */
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static void timeout_cb(uev_t *ctx, uev_io_t *w, void *data)
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{
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timer = NULL;
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fprintf(stderr, "\nTimeout exceeded %p\n", data);
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uev_timer_delete(ctx, w);
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uev_exit(ctx);
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}
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static void periodic_task(uev_t *ctx __attribute__ ((unused)), uev_io_t *w __attribute__ ((unused)), void *data __attribute__ ((unused)))
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{
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fprintf(stderr, "|");
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}
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static void pipe_read_cb(uev_t *ctx, uev_io_t *w __attribute__ ((unused)), void *data __attribute__ ((unused)))
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{
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int cnt;
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char msg[50];
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/* Kick watchdog */
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if (timer)
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uev_timer_set(ctx, timer, 1000, 0);
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cnt = read(in, msg, sizeof(msg));
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// fprintf(stderr, "READ %.*s %d\n", cnt, msg, cnt);
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fprintf(stderr, "%.*s.%d ", cnt, msg, cnt);
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}
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static void pipe_write_cb(uev_t *ctx, uev_io_t *w __attribute__ ((unused)), void *data)
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{
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int cnt = (int)(intptr_t)data;
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char *msg = "TESTING";
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if (write(out, msg, cnt) < 0) {
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perror("\nFailed writing to pipe");
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return;
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}
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// fprintf(stderr, "WRITE %.*s %d\n", cnt, msg, cnt);
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fprintf(stderr, "%d ", cnt);
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period = cnt + 5;
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uev_timer_create(ctx, pipe_write_cb, (void *)(intptr_t)(cnt + 1), period * 100, 0);
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}
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int main(void)
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{
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int fd[2];
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uev_t *ctx = uev_ctx_create();
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/* Total program execution time */
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uev_timer_create(ctx, lifetime_cb, (void *)(intptr_t)2, 4000, 0);
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/* Work load, one timer callback writes to a pipe periodically,
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* and one I/O watcher that is called every time the pipe has
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* some data. */
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if (pipe(fd) < 0) {
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/* Cleanup */
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uev_ctx_delete(ctx);
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return 1;
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}
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in = fd[0];
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out = fd[1];
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uev_timer_create(ctx, pipe_write_cb, (void *)(intptr_t)1, 400, 0);
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uev_io_create(ctx, pipe_read_cb, NULL, in, UEV_DIR_INBOUND);
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/* Watchdog for the above timer callback, if it doesn't wake up
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* and write to the pipe within a given deadline it will bark. */
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timer = uev_timer_create(ctx, timeout_cb, (void *)(intptr_t)1, 950, 0);
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/* Periodic background task */
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uev_timer_create(ctx, periodic_task, NULL, 200, 200);
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/* Start event loop */
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uev_run(ctx);
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/* Tear down event context */
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uev_ctx_delete(ctx);
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fprintf(stderr, "Period is %d must be 10: %s\n", period, 10 == period ? "OK" : "ERROR!");
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if (10 != period)
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return 1;
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return 0;
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}
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/**
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* Local Variables:
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* version-control: t
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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