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/*
* Copyright © 2014-2015 Red Hat, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <sys/timerfd.h>
#include <unistd.h>
#include "libinput-private.h"
#include "timer.h"
void
libinput_timer_init(struct libinput_timer *timer, struct libinput *libinput,
void (*timer_func)(uint64_t now, void *timer_func_data),
void *timer_func_data)
{
timer->libinput = libinput;
timer->timer_func = timer_func;
timer->timer_func_data = timer_func_data;
}
static void
libinput_timer_arm_timer_fd(struct libinput *libinput)
{
int r;
struct libinput_timer *timer;
struct itimerspec its = { { 0, 0 }, { 0, 0 } };
uint64_t earliest_expire = UINT64_MAX;
list_for_each(timer, &libinput->timer.list, link) {
if (timer->expire < earliest_expire)
earliest_expire = timer->expire;
}
if (earliest_expire != UINT64_MAX) {
its.it_value.tv_sec = earliest_expire / 1000;
its.it_value.tv_nsec = (earliest_expire % 1000) * 1000 * 1000;
}
r = timerfd_settime(libinput->timer.fd, TFD_TIMER_ABSTIME, &its, NULL);
if (r)
log_error(libinput, "timerfd_settime error: %s\n", strerror(errno));
}
void
libinput_timer_set(struct libinput_timer *timer, uint64_t expire)
{
#ifndef NDEBUG
uint64_t now = libinput_now(timer->libinput);
if (abs(expire - now) > 5000)
log_bug_libinput(timer->libinput,
"timer offset more than 5s, now %"
PRIu64 " expire %" PRIu64 "\n",
now, expire);
#endif
assert(expire);
if (!timer->expire)
list_insert(&timer->libinput->timer.list, &timer->link);
timer->expire = expire;
libinput_timer_arm_timer_fd(timer->libinput);
}
void
libinput_timer_cancel(struct libinput_timer *timer)
{
if (!timer->expire)
return;
timer->expire = 0;
list_remove(&timer->link);
libinput_timer_arm_timer_fd(timer->libinput);
}
static void
libinput_timer_handler(void *data)
{
struct libinput *libinput = data;
struct libinput_timer *timer, *tmp;
uint64_t now;
uint64_t discard;
int r;
r = read(libinput->timer.fd, &discard, sizeof(discard));
if (r == -1 && errno != EAGAIN)
log_bug_libinput(libinput,
"Error %d reading from timerfd (%s)",
errno,
strerror(errno));
now = libinput_now(libinput);
if (now == 0)
return;
list_for_each_safe(timer, tmp, &libinput->timer.list, link) {
if (timer->expire <= now) {
/* Clear the timer before calling timer_func,
as timer_func may re-arm it */
libinput_timer_cancel(timer);
timer->timer_func(now, timer->timer_func_data);
}
}
}
int
libinput_timer_subsys_init(struct libinput *libinput)
{
libinput->timer.fd = timerfd_create(CLOCK_MONOTONIC,
TFD_CLOEXEC | TFD_NONBLOCK);
if (libinput->timer.fd < 0)
return -1;
list_init(&libinput->timer.list);
libinput->timer.source = libinput_add_fd(libinput,
libinput->timer.fd,
libinput_timer_handler,
libinput);
if (!libinput->timer.source) {
close(libinput->timer.fd);
return -1;
}
return 0;
}
void
libinput_timer_subsys_destroy(struct libinput *libinput)
{
/* All timer users should have destroyed their timers now */
assert(list_empty(&libinput->timer.list));
libinput_remove_source(libinput, libinput->timer.source);
close(libinput->timer.fd);
}
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