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Diffstat (limited to 'contrib/librdns/rdns_ev.h')
| -rw-r--r-- | contrib/librdns/rdns_ev.h | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/contrib/librdns/rdns_ev.h b/contrib/librdns/rdns_ev.h new file mode 100644 index 000000000..1b3554bc1 --- /dev/null +++ b/contrib/librdns/rdns_ev.h @@ -0,0 +1,232 @@ +/* + * Copyright (c) 2014, Vsevolod Stakhov + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY + * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef RDNS_EV_H_ +#define RDNS_EV_H_ + +#include <ev.h> +#include <stdlib.h> +#include <string.h> +#include "rdns.h" + +#ifdef __cplusplus +extern "C" { +#endif + +static void* rdns_libev_add_read (void *priv_data, int fd, void *user_data); +static void rdns_libev_del_read(void *priv_data, void *ev_data); +static void* rdns_libev_add_write (void *priv_data, int fd, void *user_data); +static void rdns_libev_del_write (void *priv_data, void *ev_data); +static void* rdns_libev_add_timer (void *priv_data, double after, void *user_data); +static void* rdns_libev_add_periodic (void *priv_data, double after, + rdns_periodic_callback cb, void *user_data); +static void rdns_libev_del_periodic (void *priv_data, void *ev_data); +static void rdns_libev_repeat_timer (void *priv_data, void *ev_data); +static void rdns_libev_del_timer (void *priv_data, void *ev_data); + +struct rdns_ev_periodic_cbdata { + ev_timer *ev; + rdns_periodic_callback cb; + void *cbdata; +}; + +static void +rdns_bind_libev (struct rdns_resolver *resolver, struct ev_loop *loop) +{ + static struct rdns_async_context ev_ctx = { + .data = NULL, + .add_read = rdns_libev_add_read, + .del_read = rdns_libev_del_read, + .add_write = rdns_libev_add_write, + .del_write = rdns_libev_del_write, + .add_timer = rdns_libev_add_timer, + .repeat_timer = rdns_libev_repeat_timer, + .del_timer = rdns_libev_del_timer, + .add_periodic = rdns_libev_add_periodic, + .del_periodic = rdns_libev_del_periodic, + .cleanup = NULL + }, *nctx; + void *ptr; + + /* XXX: never got freed */ + ptr = malloc (sizeof (struct rdns_async_context)); + if (ptr != NULL) { + nctx = (struct rdns_async_context *)ptr; + memcpy (ptr, (void *)&ev_ctx, sizeof (struct rdns_async_context)); + nctx->data = (void*)loop; + rdns_resolver_async_bind (resolver, nctx); + } +} + +static void +rdns_libev_read_event (struct ev_loop *loop, ev_io *ev, int revents) +{ + rdns_process_read (ev->fd, ev->data); +} + +static void +rdns_libev_write_event (struct ev_loop *loop, ev_io *ev, int revents) +{ + rdns_process_retransmit (ev->fd, ev->data); +} + +static void +rdns_libev_timer_event (struct ev_loop *loop, ev_timer *ev, int revents) +{ + rdns_process_timer (ev->data); +} + +static void +rdns_libev_periodic_event (struct ev_loop *loop, ev_timer *ev, int revents) +{ + struct rdns_ev_periodic_cbdata *cbdata = (struct rdns_ev_periodic_cbdata *) + ev->data; + cbdata->cb (cbdata->cbdata); +} + +static void* +rdns_libev_add_read (void *priv_data, int fd, void *user_data) +{ + ev_io *ev; + void *ptr; + + ptr = malloc (sizeof (ev_io)); + if (ptr != NULL) { + ev = (ev_io *)ptr; + ev_io_init (ev, rdns_libev_read_event, fd, EV_READ); + ev->data = user_data; + ev_io_start ((struct ev_loop *)priv_data, ev); + } + return ptr; +} + +static void +rdns_libev_del_read (void *priv_data, void *ev_data) +{ + ev_io *ev = (ev_io*)ev_data; + if (ev != NULL) { + ev_io_stop ((struct ev_loop *)priv_data, ev); + free ((void *)ev); + } +} +static void* +rdns_libev_add_write (void *priv_data, int fd, void *user_data) +{ + ev_io *ev; + + ev = (ev_io *)malloc (sizeof (ev_io)); + if (ev != NULL) { + ev_io_init (ev, rdns_libev_write_event, fd, EV_WRITE); + ev->data = user_data; + ev_io_start ((struct ev_loop *)priv_data, ev); + } + return (void *)ev; +} + +static void +rdns_libev_del_write (void *priv_data, void *ev_data) +{ + ev_io *ev = (ev_io *)ev_data; + if (ev != NULL) { + ev_io_stop ((struct ev_loop *)priv_data, ev); + free ((void *)ev); + } +} + +static void* +rdns_libev_add_timer (void *priv_data, double after, void *user_data) +{ + ev_timer *ev; + ev = (ev_timer *)malloc (sizeof (ev_timer)); + if (ev != NULL) { + ev_timer_init (ev, rdns_libev_timer_event, after, after); + ev->data = user_data; + ev_timer_start ((struct ev_loop *)priv_data, ev); + } + return (void *)ev; +} + +static void* +rdns_libev_add_periodic (void *priv_data, double after, + rdns_periodic_callback cb, void *user_data) +{ + ev_timer *ev; + struct rdns_ev_periodic_cbdata *cbdata = NULL; + + ev = (ev_timer *)malloc (sizeof (ev_timer)); + if (ev != NULL) { + cbdata = (struct rdns_ev_periodic_cbdata *) + malloc (sizeof (struct rdns_ev_periodic_cbdata)); + if (cbdata != NULL) { + cbdata->cb = cb; + cbdata->cbdata = user_data; + cbdata->ev = ev; + ev_timer_init (ev, rdns_libev_periodic_event, after, after); + ev->data = cbdata; + ev_timer_start ((struct ev_loop *)priv_data, ev); + } + else { + free ((void *)ev); + return NULL; + } + } + return (void *)cbdata; +} + +static void +rdns_libev_del_periodic (void *priv_data, void *ev_data) +{ + struct rdns_ev_periodic_cbdata *cbdata = (struct rdns_ev_periodic_cbdata *) + ev_data; + if (cbdata != NULL) { + ev_timer_stop ((struct ev_loop *)priv_data, (ev_timer *)cbdata->ev); + free ((void *)cbdata->ev); + free ((void *)cbdata); + } +} + +static void +rdns_libev_repeat_timer (void *priv_data, void *ev_data) +{ + ev_timer *ev = (ev_timer *)ev_data; + if (ev != NULL) { + ev_timer_again ((struct ev_loop *)priv_data, ev); + } +} + +static void +rdns_libev_del_timer (void *priv_data, void *ev_data) +{ + ev_timer *ev = (ev_timer *)ev_data; + if (ev != NULL) { + ev_timer_stop ((struct ev_loop *)priv_data, ev); + free ((void *)ev); + } +} + +#ifdef __cplusplus +} +#endif + +#endif /* RDNS_EV_H_ */ |