Commit f3008520 authored by Eli Zaretskii's avatar Eli Zaretskii

Avoid a hang after C-g while sit-for on a Unix TTY

* src/thread.c (acquire_global_lock): Don't try to take the global
lock if the same thread is already holding it.  (Bug#29347)
parent d7fc719f
......@@ -97,7 +97,12 @@ post_acquire_global_lock (struct thread_state *self)
static void
acquire_global_lock (struct thread_state *self)
sys_mutex_lock (&global_lock);
/* If some Lisp was interrupted by C-g while inside pselect, the
signal handler could have called maybe_reacquire_global_lock, in
which case we are already holding the lock and shouldn't try
taking it again, or else we will hang forever. */
if (!(self && self->not_holding_lock))
sys_mutex_lock (&global_lock);
post_acquire_global_lock (self);
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