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Revert "Avoid excessive polling of universal variable file"

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This reverts commit b56b230076.
which somehow made us miss repaints on uvar notifications.

The commit was a workaround for a polling bug which was later properly
fixed by 7c5b8b855 ("Use the uvar notifier pipe timestamp to avoid
excessive polling"), so it's no longer necessary.

Add a system test. If I had a better understanding of the bug I could
probably write a better test.

Fixes #8088
This commit is contained in:
Johannes Altmanninger 2021-07-03 13:57:21 +02:00
parent c18f293ae2
commit 62d8f7277b
2 changed files with 43 additions and 3 deletions
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7
src/input_common.cpp
View File

@ -57,7 +57,7 @@ enum {
};
using readb_result_t = int;
static readb_result_t readb(int in_fd, bool queue_is_empty) {
static readb_result_t readb(int in_fd) {
assert(in_fd >= 0 && "Invalid in fd");
universal_notifier_t& notifier = universal_notifier_t::default_notifier();
select_wrapper_t fdset;
@ -98,7 +98,7 @@ static readb_result_t readb(int in_fd, bool queue_is_empty) {
// This may come about through readability, or through a call to poll().
if ((fdset.test(notifier_fd) && notifier.notification_fd_became_readable(notifier_fd)) ||
notifier.poll()) {
if (env_universal_barrier() && !queue_is_empty) {
if (env_universal_barrier()) {
return readb_uvar_notified;
}
}
@ -169,7 +169,7 @@ char_event_t input_event_queue_t::readch() {
return mevt.acquire();
}
readb_result_t rr = readb(in_, queue_.empty());
readb_result_t rr = readb(in_);
switch (rr) {
case readb_eof:
return char_event_type_t::eof;
@ -180,6 +180,7 @@ char_event_t input_event_queue_t::readch() {
break;
case readb_uvar_notified:
env_universal_barrier();
break;
case readb_ioport_notified:

39
tests/checks/tmux-prompt.fish Normal file
View File

@ -0,0 +1,39 @@
#RUN: %fish -C 'set -g fish %fish' %s
#REQUIRES: command -v tmux
# Isolated tmux.
set -g tmpdir (mktemp -d)
set -g tmux tmux -S $tmpdir/.tmux-socket -f /dev/null
set -g sleep sleep .1
set -q CI && set sleep sleep 1
set fish (builtin realpath $fish)
cd $tmpdir
while set -e prompt_var
end
$tmux new-session -x 80 -y 10 -d $fish -C '
# This is similar to "tests/interactive.config".
function fish_greeting; end
function fish_prompt; printf "prompt $status_generation> <$prompt_var> "; end
# No autosuggestion from older history.
set fish_history ""
function on_prompt_var --on-variable prompt_var
commandline -f repaint
end
'
$sleep # Let fish draw a prompt.
$tmux capture-pane -p
# CHECK: prompt 0> <>
set -U prompt_var changed
$sleep
$tmux capture-pane -p
# CHECK: prompt 0> <changed>
$tmux kill-server
rm -r $tmpdir