* syssignal.h: Declare main_thread.

(SIGNAL_THREAD_CHECK): New macro.

* keyboard.c (input_available_signal): Move thread checking code
to macro SIGNAL_THREAD_CHECK and call that macro.
(interrupt_signal): Call SIGNAL_THREAD_CHECK.

* alloc.c (uninterrupt_malloc): Move main_thread to emacs.c.

* emacs.c: Define main_thread.
(main): Initialize main_thread.
(handle_USR1_signal, handle_USR2_signal, fatal_error_signal)
(memory_warning_signal): Call SIGNAL_THREAD_CHECK.

* floatfns.c (float_error): Call SIGNAL_THREAD_CHECK.

* dispnew.c (window_change_signal): Call SIGNAL_THREAD_CHECK.

* sysdep.c (select_alarm): Call SIGNAL_THREAD_CHECK.

* process.c (send_process_trap, sigchld_handler): Call
SIGNAL_THREAD_CHECK.

* data.c (arith_error): Call SIGNAL_THREAD_CHECK.

* atimer.c (alarm_signal_handler): Call SIGNAL_THREAD_CHECK.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/data.c b/src/data.c
index afbca80181d..811619b58b3 100644
--- a/src/data.c
+++ b/src/data.c
@@ -3366,6 +3366,7 @@ arith_error (signo)
   sigsetmask (SIGEMPTYMASK);
 #endif /* not BSD4_1 */
 
+  SIGNAL_THREAD_CHECK (signo);
   Fsignal (Qarith_error, Qnil);
 }