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drm_common: Improve VT switching signal handling somewhat

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By blocking the VT switcher signal in the VO thread we get less races
and other oddities.

This gets rid of tearing (at least for me) when VT switching with
--gpu-context=drm.
This commit is contained in:
Anton Kindestam 2018-02-25 00:57:47 +01:00 committed by Kevin Mitchell
parent 0874e4e461
commit a4c436bac2
1 changed files with 15 additions and 1 deletions
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16
video/out/drm_common.c
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@ -431,7 +431,6 @@ static int install_signal(int signo, void (*handler)(int))
return sigaction(signo, &act, NULL);
}
bool vt_switcher_init(struct vt_switcher *s, struct mp_log *log)
{
s->log = log;
@ -482,6 +481,14 @@ bool vt_switcher_init(struct vt_switcher *s, struct mp_log *log)
return false;
}
// Block the VT switching signals from interrupting the VO thread (they will
// still be picked up by other threads, which will fill vt_switcher_pipe for us)
sigset_t set;
sigemptyset(&set);
sigaddset(&set, RELEASE_SIGNAL);
sigaddset(&set, ACQUIRE_SIGNAL);
pthread_sigmask(SIG_BLOCK, &set, NULL);
return true;
}
@ -507,6 +514,13 @@ void vt_switcher_interrupt_poll(struct vt_switcher *s)
void vt_switcher_destroy(struct vt_switcher *s)
{
struct vt_mode vt_mode = {0};
vt_mode.mode = VT_AUTO;
if (ioctl(s->tty_fd, VT_SETMODE, &vt_mode) < 0) {
MP_ERR(s, "VT_SETMODE failed: %s\n", mp_strerror(errno));
return;
}
install_signal(RELEASE_SIGNAL, SIG_DFL);
install_signal(ACQUIRE_SIGNAL, SIG_DFL);
close(s->tty_fd);