2508268357
Reported by: hans
861 lines
20 KiB
C
861 lines
20 KiB
C
/*-
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* Copyright (c) 2014 Jakub Wojciech Klama <jceel@FreeBSD.org>
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* Copyright (c) 2015-2016 Vladimir Kondratyev <wulf@cicgroup.ru>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include "opt_evdev.h"
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#include <sys/types.h>
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#include <sys/bitstring.h>
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#include <sys/systm.h>
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/conf.h>
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#include <sys/uio.h>
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#include <sys/proc.h>
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#include <sys/poll.h>
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#include <sys/filio.h>
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#include <sys/fcntl.h>
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#include <sys/selinfo.h>
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#include <sys/malloc.h>
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#include <sys/time.h>
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#include <dev/evdev/input.h>
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#include <dev/evdev/evdev.h>
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#include <dev/evdev/evdev_private.h>
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#ifdef EVDEV_DEBUG
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#define debugf(client, fmt, args...) printf("evdev cdev: "fmt"\n", ##args)
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#else
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#define debugf(client, fmt, args...)
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#endif
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#define DEF_RING_REPORTS 8
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static d_open_t evdev_open;
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static d_read_t evdev_read;
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static d_write_t evdev_write;
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static d_ioctl_t evdev_ioctl;
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static d_poll_t evdev_poll;
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static d_kqfilter_t evdev_kqfilter;
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static int evdev_kqread(struct knote *kn, long hint);
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static void evdev_kqdetach(struct knote *kn);
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static void evdev_dtor(void *);
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static int evdev_ioctl_eviocgbit(struct evdev_dev *, int, int, caddr_t);
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static void evdev_client_filter_queue(struct evdev_client *, uint16_t);
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static struct cdevsw evdev_cdevsw = {
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.d_version = D_VERSION,
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.d_open = evdev_open,
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.d_read = evdev_read,
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.d_write = evdev_write,
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.d_ioctl = evdev_ioctl,
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.d_poll = evdev_poll,
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.d_kqfilter = evdev_kqfilter,
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.d_name = "evdev",
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};
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static struct filterops evdev_cdev_filterops = {
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.f_isfd = 1,
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.f_attach = NULL,
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.f_detach = evdev_kqdetach,
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.f_event = evdev_kqread,
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};
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static int
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evdev_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
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{
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struct evdev_dev *evdev = dev->si_drv1;
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struct evdev_client *client;
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size_t buffer_size;
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int ret;
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if (evdev == NULL)
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return (ENODEV);
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/* Initialize client structure */
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buffer_size = evdev->ev_report_size * DEF_RING_REPORTS;
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client = malloc(offsetof(struct evdev_client, ec_buffer) +
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sizeof(struct input_event) * buffer_size,
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M_EVDEV, M_WAITOK | M_ZERO);
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/* Initialize ring buffer */
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client->ec_buffer_size = buffer_size;
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client->ec_buffer_head = 0;
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client->ec_buffer_tail = 0;
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client->ec_buffer_ready = 0;
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client->ec_evdev = evdev;
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mtx_init(&client->ec_buffer_mtx, "evclient", "evdev", MTX_DEF);
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knlist_init_mtx(&client->ec_selp.si_note, &client->ec_buffer_mtx);
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/* Avoid race with evdev_unregister */
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EVDEV_LOCK(evdev);
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if (dev->si_drv1 == NULL)
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ret = ENODEV;
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else
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ret = evdev_register_client(evdev, client);
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if (ret != 0)
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evdev_revoke_client(client);
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/*
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* Unlock evdev here because non-sleepable lock held
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* while calling devfs_set_cdevpriv upsets WITNESS
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*/
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EVDEV_UNLOCK(evdev);
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if (!ret)
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ret = devfs_set_cdevpriv(client, evdev_dtor);
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if (ret != 0) {
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debugf(client, "cannot register evdev client");
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evdev_dtor(client);
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}
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return (ret);
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}
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static void
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evdev_dtor(void *data)
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{
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struct evdev_client *client = (struct evdev_client *)data;
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EVDEV_LOCK(client->ec_evdev);
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if (!client->ec_revoked)
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evdev_dispose_client(client->ec_evdev, client);
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EVDEV_UNLOCK(client->ec_evdev);
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knlist_clear(&client->ec_selp.si_note, 0);
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seldrain(&client->ec_selp);
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knlist_destroy(&client->ec_selp.si_note);
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funsetown(&client->ec_sigio);
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mtx_destroy(&client->ec_buffer_mtx);
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free(client, M_EVDEV);
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}
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static int
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evdev_read(struct cdev *dev, struct uio *uio, int ioflag)
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{
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struct evdev_client *client;
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struct input_event *event;
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int ret = 0;
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int remaining;
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ret = devfs_get_cdevpriv((void **)&client);
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if (ret != 0)
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return (ret);
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debugf(client, "read %zd bytes by thread %d", uio->uio_resid,
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uio->uio_td->td_tid);
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if (client->ec_revoked)
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return (ENODEV);
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/* Zero-sized reads are allowed for error checking */
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if (uio->uio_resid != 0 && uio->uio_resid < sizeof(struct input_event))
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return (EINVAL);
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remaining = uio->uio_resid / sizeof(struct input_event);
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EVDEV_CLIENT_LOCKQ(client);
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if (EVDEV_CLIENT_EMPTYQ(client)) {
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if (ioflag & O_NONBLOCK)
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ret = EWOULDBLOCK;
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else {
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if (remaining != 0) {
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client->ec_blocked = true;
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ret = mtx_sleep(client, &client->ec_buffer_mtx,
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PCATCH, "evread", 0);
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}
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}
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}
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while (ret == 0 && !EVDEV_CLIENT_EMPTYQ(client) && remaining > 0) {
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event = &client->ec_buffer[client->ec_buffer_head];
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client->ec_buffer_head =
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(client->ec_buffer_head + 1) % client->ec_buffer_size;
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remaining--;
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EVDEV_CLIENT_UNLOCKQ(client);
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ret = uiomove(event, sizeof(struct input_event), uio);
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EVDEV_CLIENT_LOCKQ(client);
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}
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EVDEV_CLIENT_UNLOCKQ(client);
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return (ret);
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}
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static int
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evdev_write(struct cdev *dev, struct uio *uio, int ioflag)
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{
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struct evdev_dev *evdev = dev->si_drv1;
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struct evdev_client *client;
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struct input_event event;
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int ret = 0;
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ret = devfs_get_cdevpriv((void **)&client);
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if (ret != 0)
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return (ret);
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debugf(client, "write %zd bytes by thread %d", uio->uio_resid,
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uio->uio_td->td_tid);
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if (client->ec_revoked || evdev == NULL)
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return (ENODEV);
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if (uio->uio_resid % sizeof(struct input_event) != 0) {
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debugf(client, "write size not multiple of input_event size");
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return (EINVAL);
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}
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while (uio->uio_resid > 0 && ret == 0) {
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ret = uiomove(&event, sizeof(struct input_event), uio);
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if (ret == 0)
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ret = evdev_inject_event(evdev, event.type, event.code,
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event.value);
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}
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return (ret);
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}
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static int
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evdev_poll(struct cdev *dev, int events, struct thread *td)
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{
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struct evdev_client *client;
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int ret;
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int revents = 0;
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ret = devfs_get_cdevpriv((void **)&client);
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if (ret != 0)
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return (POLLNVAL);
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debugf(client, "poll by thread %d", td->td_tid);
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if (client->ec_revoked)
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return (POLLHUP);
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if (events & (POLLIN | POLLRDNORM)) {
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EVDEV_CLIENT_LOCKQ(client);
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if (!EVDEV_CLIENT_EMPTYQ(client))
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revents = events & (POLLIN | POLLRDNORM);
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else {
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client->ec_selected = true;
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selrecord(td, &client->ec_selp);
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}
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EVDEV_CLIENT_UNLOCKQ(client);
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}
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return (revents);
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}
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static int
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evdev_kqfilter(struct cdev *dev, struct knote *kn)
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{
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struct evdev_client *client;
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int ret;
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ret = devfs_get_cdevpriv((void **)&client);
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if (ret != 0)
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return (ret);
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if (client->ec_revoked)
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return (ENODEV);
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switch(kn->kn_filter) {
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case EVFILT_READ:
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kn->kn_fop = &evdev_cdev_filterops;
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break;
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default:
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return(EINVAL);
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}
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kn->kn_hook = (caddr_t)client;
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knlist_add(&client->ec_selp.si_note, kn, 0);
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return (0);
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}
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static int
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evdev_kqread(struct knote *kn, long hint)
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{
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struct evdev_client *client;
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int ret;
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client = (struct evdev_client *)kn->kn_hook;
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EVDEV_CLIENT_LOCKQ_ASSERT(client);
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if (client->ec_revoked) {
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kn->kn_flags |= EV_EOF;
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ret = 1;
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} else {
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kn->kn_data = EVDEV_CLIENT_SIZEQ(client) *
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sizeof(struct input_event);
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ret = !EVDEV_CLIENT_EMPTYQ(client);
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}
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return (ret);
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}
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static void
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evdev_kqdetach(struct knote *kn)
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{
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struct evdev_client *client;
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client = (struct evdev_client *)kn->kn_hook;
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knlist_remove(&client->ec_selp.si_note, kn, 0);
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}
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static int
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evdev_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
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struct thread *td)
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{
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struct evdev_dev *evdev = dev->si_drv1;
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struct evdev_client *client;
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struct input_keymap_entry *ke;
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int ret, len, limit, type_num;
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uint32_t code;
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size_t nvalues;
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ret = devfs_get_cdevpriv((void **)&client);
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if (ret != 0)
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return (ret);
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if (client->ec_revoked || evdev == NULL)
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return (ENODEV);
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/* file I/O ioctl handling */
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switch (cmd) {
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case FIOSETOWN:
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return (fsetown(*(int *)data, &client->ec_sigio));
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case FIOGETOWN:
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*(int *)data = fgetown(&client->ec_sigio);
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return (0);
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case FIONBIO:
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return (0);
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case FIOASYNC:
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if (*(int *)data)
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client->ec_async = true;
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else
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client->ec_async = false;
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return (0);
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case FIONREAD:
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EVDEV_CLIENT_LOCKQ(client);
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*(int *)data =
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EVDEV_CLIENT_SIZEQ(client) * sizeof(struct input_event);
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EVDEV_CLIENT_UNLOCKQ(client);
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return (0);
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}
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len = IOCPARM_LEN(cmd);
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debugf(client, "ioctl called: cmd=0x%08lx, data=%p", cmd, data);
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/* evdev fixed-length ioctls handling */
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switch (cmd) {
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case EVIOCGVERSION:
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*(int *)data = EV_VERSION;
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return (0);
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case EVIOCGID:
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debugf(client, "EVIOCGID: bus=%d vendor=0x%04x product=0x%04x",
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evdev->ev_id.bustype, evdev->ev_id.vendor,
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evdev->ev_id.product);
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memcpy(data, &evdev->ev_id, sizeof(struct input_id));
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return (0);
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case EVIOCGREP:
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if (!evdev_event_supported(evdev, EV_REP))
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return (ENOTSUP);
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memcpy(data, evdev->ev_rep, sizeof(evdev->ev_rep));
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return (0);
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case EVIOCSREP:
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if (!evdev_event_supported(evdev, EV_REP))
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return (ENOTSUP);
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evdev_inject_event(evdev, EV_REP, REP_DELAY, ((int *)data)[0]);
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evdev_inject_event(evdev, EV_REP, REP_PERIOD,
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((int *)data)[1]);
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return (0);
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case EVIOCGKEYCODE:
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/* Fake unsupported ioctl */
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return (0);
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case EVIOCGKEYCODE_V2:
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if (evdev->ev_methods == NULL ||
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evdev->ev_methods->ev_get_keycode == NULL)
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return (ENOTSUP);
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ke = (struct input_keymap_entry *)data;
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evdev->ev_methods->ev_get_keycode(evdev, evdev->ev_softc, ke);
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return (0);
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case EVIOCSKEYCODE:
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/* Fake unsupported ioctl */
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return (0);
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case EVIOCSKEYCODE_V2:
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if (evdev->ev_methods == NULL ||
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evdev->ev_methods->ev_set_keycode == NULL)
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return (ENOTSUP);
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ke = (struct input_keymap_entry *)data;
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evdev->ev_methods->ev_set_keycode(evdev, evdev->ev_softc, ke);
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return (0);
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case EVIOCGABS(0) ... EVIOCGABS(ABS_MAX):
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if (evdev->ev_absinfo == NULL)
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return (EINVAL);
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memcpy(data, &evdev->ev_absinfo[cmd - EVIOCGABS(0)],
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sizeof(struct input_absinfo));
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return (0);
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case EVIOCSABS(0) ... EVIOCSABS(ABS_MAX):
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if (evdev->ev_absinfo == NULL)
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return (EINVAL);
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code = cmd - EVIOCSABS(0);
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/* mt-slot number can not be changed */
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if (code == ABS_MT_SLOT)
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return (EINVAL);
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EVDEV_LOCK(evdev);
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evdev_set_absinfo(evdev, code, (struct input_absinfo *)data);
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EVDEV_UNLOCK(evdev);
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return (0);
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case EVIOCSFF:
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case EVIOCRMFF:
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case EVIOCGEFFECTS:
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/* Fake unsupported ioctls */
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return (0);
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case EVIOCGRAB:
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EVDEV_LOCK(evdev);
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if (*(int *)data)
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ret = evdev_grab_client(evdev, client);
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else
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ret = evdev_release_client(evdev, client);
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EVDEV_UNLOCK(evdev);
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return (ret);
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case EVIOCREVOKE:
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if (*(int *)data != 0)
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return (EINVAL);
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EVDEV_LOCK(evdev);
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if (dev->si_drv1 != NULL && !client->ec_revoked) {
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evdev_dispose_client(evdev, client);
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evdev_revoke_client(client);
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}
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EVDEV_UNLOCK(evdev);
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return (0);
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case EVIOCSCLOCKID:
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switch (*(int *)data) {
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case CLOCK_REALTIME:
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client->ec_clock_id = EV_CLOCK_REALTIME;
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return (0);
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case CLOCK_MONOTONIC:
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client->ec_clock_id = EV_CLOCK_MONOTONIC;
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return (0);
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default:
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return (EINVAL);
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}
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}
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/* evdev variable-length ioctls handling */
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switch (IOCBASECMD(cmd)) {
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case EVIOCGNAME(0):
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strlcpy(data, evdev->ev_name, len);
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return (0);
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case EVIOCGPHYS(0):
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if (evdev->ev_shortname[0] == 0)
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return (ENOENT);
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strlcpy(data, evdev->ev_shortname, len);
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return (0);
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case EVIOCGUNIQ(0):
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if (evdev->ev_serial[0] == 0)
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return (ENOENT);
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strlcpy(data, evdev->ev_serial, len);
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return (0);
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case EVIOCGPROP(0):
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limit = MIN(len, bitstr_size(INPUT_PROP_CNT));
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memcpy(data, evdev->ev_prop_flags, limit);
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return (0);
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|
|
case EVIOCGMTSLOTS(0):
|
|
if (evdev->ev_mt == NULL)
|
|
return (EINVAL);
|
|
if (len < sizeof(uint32_t))
|
|
return (EINVAL);
|
|
code = *(uint32_t *)data;
|
|
if (!ABS_IS_MT(code))
|
|
return (EINVAL);
|
|
|
|
nvalues =
|
|
MIN(len / sizeof(int32_t) - 1, MAXIMAL_MT_SLOT(evdev) + 1);
|
|
for (int i = 0; i < nvalues; i++)
|
|
((int32_t *)data)[i + 1] =
|
|
evdev_get_mt_value(evdev, i, code);
|
|
return (0);
|
|
|
|
case EVIOCGKEY(0):
|
|
limit = MIN(len, bitstr_size(KEY_CNT));
|
|
EVDEV_LOCK(evdev);
|
|
evdev_client_filter_queue(client, EV_KEY);
|
|
memcpy(data, evdev->ev_key_states, limit);
|
|
EVDEV_UNLOCK(evdev);
|
|
return (0);
|
|
|
|
case EVIOCGLED(0):
|
|
limit = MIN(len, bitstr_size(LED_CNT));
|
|
EVDEV_LOCK(evdev);
|
|
evdev_client_filter_queue(client, EV_LED);
|
|
memcpy(data, evdev->ev_led_states, limit);
|
|
EVDEV_UNLOCK(evdev);
|
|
return (0);
|
|
|
|
case EVIOCGSND(0):
|
|
limit = MIN(len, bitstr_size(SND_CNT));
|
|
EVDEV_LOCK(evdev);
|
|
evdev_client_filter_queue(client, EV_SND);
|
|
memcpy(data, evdev->ev_snd_states, limit);
|
|
EVDEV_UNLOCK(evdev);
|
|
return (0);
|
|
|
|
case EVIOCGSW(0):
|
|
limit = MIN(len, bitstr_size(SW_CNT));
|
|
EVDEV_LOCK(evdev);
|
|
evdev_client_filter_queue(client, EV_SW);
|
|
memcpy(data, evdev->ev_sw_states, limit);
|
|
EVDEV_UNLOCK(evdev);
|
|
return (0);
|
|
|
|
case EVIOCGBIT(0, 0) ... EVIOCGBIT(EV_MAX, 0):
|
|
type_num = IOCBASECMD(cmd) - EVIOCGBIT(0, 0);
|
|
debugf(client, "EVIOCGBIT(%d): data=%p, len=%d", type_num,
|
|
data, len);
|
|
return (evdev_ioctl_eviocgbit(evdev, type_num, len, data));
|
|
}
|
|
|
|
return (EINVAL);
|
|
}
|
|
|
|
static int
|
|
evdev_ioctl_eviocgbit(struct evdev_dev *evdev, int type, int len, caddr_t data)
|
|
{
|
|
unsigned long *bitmap;
|
|
int limit;
|
|
|
|
switch (type) {
|
|
case 0:
|
|
bitmap = evdev->ev_type_flags;
|
|
limit = EV_CNT;
|
|
break;
|
|
case EV_KEY:
|
|
bitmap = evdev->ev_key_flags;
|
|
limit = KEY_CNT;
|
|
break;
|
|
case EV_REL:
|
|
bitmap = evdev->ev_rel_flags;
|
|
limit = REL_CNT;
|
|
break;
|
|
case EV_ABS:
|
|
bitmap = evdev->ev_abs_flags;
|
|
limit = ABS_CNT;
|
|
break;
|
|
case EV_MSC:
|
|
bitmap = evdev->ev_msc_flags;
|
|
limit = MSC_CNT;
|
|
break;
|
|
case EV_LED:
|
|
bitmap = evdev->ev_led_flags;
|
|
limit = LED_CNT;
|
|
break;
|
|
case EV_SND:
|
|
bitmap = evdev->ev_snd_flags;
|
|
limit = SND_CNT;
|
|
break;
|
|
case EV_SW:
|
|
bitmap = evdev->ev_sw_flags;
|
|
limit = SW_CNT;
|
|
break;
|
|
case EV_FF:
|
|
/*
|
|
* We don't support EV_FF now, so let's
|
|
* just fake it returning only zeros.
|
|
*/
|
|
bzero(data, len);
|
|
return (0);
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
|
|
/*
|
|
* Clear ioctl data buffer in case it's bigger than
|
|
* bitmap size
|
|
*/
|
|
bzero(data, len);
|
|
|
|
limit = bitstr_size(limit);
|
|
len = MIN(limit, len);
|
|
memcpy(data, bitmap, len);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
evdev_revoke_client(struct evdev_client *client)
|
|
{
|
|
|
|
EVDEV_LOCK_ASSERT(client->ec_evdev);
|
|
|
|
client->ec_revoked = true;
|
|
}
|
|
|
|
void
|
|
evdev_notify_event(struct evdev_client *client)
|
|
{
|
|
|
|
EVDEV_CLIENT_LOCKQ_ASSERT(client);
|
|
|
|
if (client->ec_blocked) {
|
|
client->ec_blocked = false;
|
|
wakeup(client);
|
|
}
|
|
if (client->ec_selected) {
|
|
client->ec_selected = false;
|
|
selwakeup(&client->ec_selp);
|
|
}
|
|
KNOTE_LOCKED(&client->ec_selp.si_note, 0);
|
|
|
|
if (client->ec_async && client->ec_sigio != NULL)
|
|
pgsigio(&client->ec_sigio, SIGIO, 0);
|
|
}
|
|
|
|
int
|
|
evdev_cdev_create(struct evdev_dev *evdev)
|
|
{
|
|
struct make_dev_args mda;
|
|
int ret, unit = 0;
|
|
|
|
make_dev_args_init(&mda);
|
|
mda.mda_flags = MAKEDEV_WAITOK | MAKEDEV_CHECKNAME;
|
|
mda.mda_devsw = &evdev_cdevsw;
|
|
mda.mda_uid = UID_ROOT;
|
|
mda.mda_gid = GID_WHEEL;
|
|
mda.mda_mode = 0600;
|
|
mda.mda_si_drv1 = evdev;
|
|
|
|
/* Try to coexist with cuse-backed input/event devices */
|
|
while ((ret = make_dev_s(&mda, &evdev->ev_cdev, "input/event%d", unit))
|
|
== EEXIST)
|
|
unit++;
|
|
|
|
if (ret == 0)
|
|
evdev->ev_unit = unit;
|
|
|
|
return (ret);
|
|
}
|
|
|
|
int
|
|
evdev_cdev_destroy(struct evdev_dev *evdev)
|
|
{
|
|
|
|
destroy_dev(evdev->ev_cdev);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
evdev_client_gettime(struct evdev_client *client, struct timeval *tv)
|
|
{
|
|
|
|
switch (client->ec_clock_id) {
|
|
case EV_CLOCK_BOOTTIME:
|
|
/*
|
|
* XXX: FreeBSD does not support true POSIX monotonic clock.
|
|
* So aliase EV_CLOCK_BOOTTIME to EV_CLOCK_MONOTONIC.
|
|
*/
|
|
case EV_CLOCK_MONOTONIC:
|
|
microuptime(tv);
|
|
break;
|
|
|
|
case EV_CLOCK_REALTIME:
|
|
default:
|
|
microtime(tv);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
evdev_client_push(struct evdev_client *client, uint16_t type, uint16_t code,
|
|
int32_t value)
|
|
{
|
|
struct timeval time;
|
|
size_t count, head, tail, ready;
|
|
|
|
EVDEV_CLIENT_LOCKQ_ASSERT(client);
|
|
head = client->ec_buffer_head;
|
|
tail = client->ec_buffer_tail;
|
|
ready = client->ec_buffer_ready;
|
|
count = client->ec_buffer_size;
|
|
|
|
/* If queue is full drop its content and place SYN_DROPPED event */
|
|
if ((tail + 1) % count == head) {
|
|
debugf(client, "client %p: buffer overflow", client);
|
|
|
|
head = (tail + count - 1) % count;
|
|
client->ec_buffer[head] = (struct input_event) {
|
|
.type = EV_SYN,
|
|
.code = SYN_DROPPED,
|
|
.value = 0
|
|
};
|
|
/*
|
|
* XXX: Here is a small race window from now till the end of
|
|
* report. The queue is empty but client has been already
|
|
* notified of data readyness. Can be fixed in two ways:
|
|
* 1. Implement bulk insert so queue lock would not be dropped
|
|
* till the SYN_REPORT event.
|
|
* 2. Insert SYN_REPORT just now and skip remaining events
|
|
*/
|
|
client->ec_buffer_head = head;
|
|
client->ec_buffer_ready = head;
|
|
}
|
|
|
|
client->ec_buffer[tail].type = type;
|
|
client->ec_buffer[tail].code = code;
|
|
client->ec_buffer[tail].value = value;
|
|
client->ec_buffer_tail = (tail + 1) % count;
|
|
|
|
/* Allow users to read events only after report has been completed */
|
|
if (type == EV_SYN && code == SYN_REPORT) {
|
|
evdev_client_gettime(client, &time);
|
|
for (; ready != client->ec_buffer_tail;
|
|
ready = (ready + 1) % count)
|
|
client->ec_buffer[ready].time = time;
|
|
client->ec_buffer_ready = client->ec_buffer_tail;
|
|
}
|
|
}
|
|
|
|
void
|
|
evdev_client_dumpqueue(struct evdev_client *client)
|
|
{
|
|
struct input_event *event;
|
|
size_t i, head, tail, ready, size;
|
|
|
|
head = client->ec_buffer_head;
|
|
tail = client->ec_buffer_tail;
|
|
ready = client->ec_buffer_ready;
|
|
size = client->ec_buffer_size;
|
|
|
|
printf("evdev client: %p\n", client);
|
|
printf("event queue: head=%zu ready=%zu tail=%zu size=%zu\n",
|
|
head, ready, tail, size);
|
|
|
|
printf("queue contents:\n");
|
|
|
|
for (i = 0; i < size; i++) {
|
|
event = &client->ec_buffer[i];
|
|
printf("%zu: ", i);
|
|
|
|
if (i < head || i > tail)
|
|
printf("unused\n");
|
|
else
|
|
printf("type=%d code=%d value=%d ", event->type,
|
|
event->code, event->value);
|
|
|
|
if (i == head)
|
|
printf("<- head\n");
|
|
else if (i == tail)
|
|
printf("<- tail\n");
|
|
else if (i == ready)
|
|
printf("<- ready\n");
|
|
else
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
static void
|
|
evdev_client_filter_queue(struct evdev_client *client, uint16_t type)
|
|
{
|
|
struct input_event *event;
|
|
size_t head, tail, count, i;
|
|
bool last_was_syn = false;
|
|
|
|
EVDEV_CLIENT_LOCKQ(client);
|
|
|
|
i = head = client->ec_buffer_head;
|
|
tail = client->ec_buffer_tail;
|
|
count = client->ec_buffer_size;
|
|
client->ec_buffer_ready = client->ec_buffer_tail;
|
|
|
|
while (i != client->ec_buffer_tail) {
|
|
event = &client->ec_buffer[i];
|
|
i = (i + 1) % count;
|
|
|
|
/* Skip event of given type */
|
|
if (event->type == type)
|
|
continue;
|
|
|
|
/* Remove empty SYN_REPORT events */
|
|
if (event->type == EV_SYN && event->code == SYN_REPORT) {
|
|
if (last_was_syn)
|
|
continue;
|
|
else
|
|
client->ec_buffer_ready = (tail + 1) % count;
|
|
}
|
|
|
|
/* Rewrite entry */
|
|
memcpy(&client->ec_buffer[tail], event,
|
|
sizeof(struct input_event));
|
|
|
|
last_was_syn = (event->type == EV_SYN &&
|
|
event->code == SYN_REPORT);
|
|
|
|
tail = (tail + 1) % count;
|
|
}
|
|
|
|
client->ec_buffer_head = i;
|
|
client->ec_buffer_tail = tail;
|
|
|
|
EVDEV_CLIENT_UNLOCKQ(client);
|
|
}
|