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use signalfd instead

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This commit is contained in:
John Sullivan
2020-08-20 19:30:47 -07:00
parent ba735340dc
commit b236c2fb35
1 changed files with 46 additions and 24 deletions
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lisgd.c
+46 -24
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@@ -3,6 +3,7 @@
#include <libinput.h>
#include <math.h>
#include <signal.h>
#include <sys/signalfd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -230,16 +231,23 @@ touchup(struct libinput_event *e)
}
}
void
registerorientchange() {
struct sigaction action;
int
sigusr1fd() {
sigset_t mask;
int sfd;
action.sa_flags = SA_SIGINFO;
action.sa_sigaction = &changeorientation;
if(sigaction(SIGUSR1, &action, NULL) == -1) {
die("Couldn't register reorient signal action.");
sigemptyset(&mask);
sigaddset(&mask, SIGUSR1);
if (sigprocmask(SIG_BLOCK, &mask, NULL) == -1) {
die("Can't block SIGUSR1.");
}
sfd = signalfd(-1, &mask, 0);
if (sfd == -1) {
die("Can't open signalfd on SIGUSR1.");
}
return sfd;
}
void
@@ -251,7 +259,12 @@ run()
struct libinput_event_touch *tevent;
struct libinput_device *d;
int selectresult;
fd_set fdset;
int li_fd;
int sig_fd;
int sfdrsize;
struct signalfd_siginfo sfdinfo;
const static struct libinput_interface interface = {
.open_restricted = libinputopenrestricted,
@@ -276,25 +289,37 @@ run()
ystart[i] = NOMOTION;
}
FD_ZERO(&fdset);
FD_SET(libinput_get_fd(li), &fdset);
sig_fd = sigusr1fd();
li_fd = libinput_get_fd(li);
for (;;) {
FD_ZERO(&fdset);
FD_SET(sig_fd, &fdset);
FD_SET(li_fd, &fdset);
selectresult = select(FD_SETSIZE, &fdset, NULL, NULL, NULL);
if (selectresult == -1) {
die("Can't select on device node?");
} else {
libinput_dispatch(li);
while ((event = libinput_get_event(li)) != NULL) {
if (orientationdirty) {
reorientgestures(orientation);
orientationdirty = 0;
}
else {
if (FD_ISSET(sig_fd, &fdset)) {
sfdrsize = read(sig_fd, &sfdinfo, sizeof(struct signalfd_siginfo));
if (sfdrsize != sizeof(struct signalfd_siginfo)) {
die("Couldn't read reorient signal.");
}
switch(libinput_event_get_type(event)) {
case LIBINPUT_EVENT_TOUCH_DOWN: touchdown(event); break;
case LIBINPUT_EVENT_TOUCH_UP: touchup(event); break;
case LIBINPUT_EVENT_TOUCH_MOTION: touchmotion(event); break;
reorientgestures(sfdinfo.ssi_int);
}
if (FD_ISSET(li_fd, &fdset)) {
libinput_dispatch(li);
while ((event = libinput_get_event(li)) != NULL) {
switch(libinput_event_get_type(event)) {
case LIBINPUT_EVENT_TOUCH_DOWN: touchdown(event); break;
case LIBINPUT_EVENT_TOUCH_UP: touchup(event); break;
case LIBINPUT_EVENT_TOUCH_MOTION: touchmotion(event); break;
}
libinput_event_destroy(event);
}
libinput_event_destroy(event);
}
}
}
@@ -370,9 +395,6 @@ main(int argc, char *argv[])
// Modify gestures swipes based on orientation provided
reorientgestures(orientation);
// Change orientation at runtime (via SIGUSR1)
registerorientchange();
run();
return 0;
}