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render: add a timeout for application synchronized updates

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This ensures we can recover from a crashing (or bad behaving)
application that sends a BSU but then never sends an ESU.
This commit is contained in:
Daniel Eklöf 2020-01-12 12:40:42 +01:00
parent 6e474e77e5
commit afa1dbb7cc
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GPG key ID: 5BBD4992C116573F
3 changed files with 60 additions and 8 deletions
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22
render.c
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@ -1193,7 +1193,7 @@ fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data)
if (!term->render.refresh_needed)
continue;
if (term->render.application_synchronized_updates)
if (term->render.application_synchronized_updates.enabled)
continue;
assert(term->window->is_configured);
@ -1244,19 +1244,31 @@ render_refresh(struct terminal *term)
void
render_enable_application_synchronized_updates(struct terminal *term)
{
if (term->render.application_synchronized_updates)
if (term->render.application_synchronized_updates.enabled)
return;
term->render.application_synchronized_updates = true;
term->render.application_synchronized_updates.enabled = true;
if (timerfd_settime(
term->render.application_synchronized_updates.timer_fd, 0,
&(struct itimerspec){.it_value = {.tv_sec = 1}}, NULL) < 0)
{
LOG_ERR("failed to arm timer for application synchronized updates");
}
}
void
render_disable_application_synchronized_updates(struct terminal *term)
{
if (!term->render.application_synchronized_updates)
if (!term->render.application_synchronized_updates.enabled)
return;
term->render.application_synchronized_updates = false;
term->render.application_synchronized_updates.enabled = false;
/* Reset timers */
timerfd_settime(
term->render.application_synchronized_updates.timer_fd, 0,
&(struct itimerspec){{0}}, NULL);
}
bool