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fix: lock mutex before checking altscreen state

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This prevents the odd race condition where Enter- & ExitAltScreen
are called concurrently.
This commit is contained in:
Christian Muehlhaeuser
2022-10-13 04:33:34 +02:00
parent b8ef6f85ea
commit db664820d4
1 changed files with 6 additions and 6 deletions
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12
standard_renderer.go
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@@ -268,13 +268,13 @@ func (r *standardRenderer) altScreen() bool {
}
func (r *standardRenderer) enterAltScreen() {
r.mtx.Lock()
defer r.mtx.Unlock()
if r.altScreenActive {
return
}
r.mtx.Lock()
defer r.mtx.Unlock()
r.altScreenActive = true
r.out.AltScreen()
@@ -291,13 +291,13 @@ func (r *standardRenderer) enterAltScreen() {
}
func (r *standardRenderer) exitAltScreen() {
r.mtx.Lock()
defer r.mtx.Unlock()
if !r.altScreenActive {
return
}
r.mtx.Lock()
defer r.mtx.Unlock()
r.altScreenActive = false
r.out.ExitAltScreen()