--- a/src/getchar.c
+++ b/src/getchar.c
@@ -1901,6 +1901,205 @@ char_avail(void)
     return (retval != NUL);
 }
 
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * "getchar()" function
+ */
+    void
+f_getchar(typval_T *argvars, typval_T *rettv)
+{
+    varnumber_T		n;
+    int			error = FALSE;
+
+#ifdef MESSAGE_QUEUE
+    // vpeekc() used to check for messages, but that caused problems, invoking
+    // a callback where it was not expected.  Some plugins use getchar(1) in a
+    // loop to await a message, therefore make sure we check for messages here.
+    parse_queued_messages();
+#endif
+
+    /* Position the cursor.  Needed after a message that ends in a space. */
+    windgoto(msg_row, msg_col);
+
+    ++no_mapping;
+    ++allow_keys;
+    for (;;)
+    {
+	if (argvars[0].v_type == VAR_UNKNOWN)
+	    /* getchar(): blocking wait. */
+	    n = plain_vgetc();
+	else if (tv_get_number_chk(&argvars[0], &error) == 1)
+	    /* getchar(1): only check if char avail */
+	    n = vpeekc_any();
+	else if (error || vpeekc_any() == NUL)
+	    /* illegal argument or getchar(0) and no char avail: return zero */
+	    n = 0;
+	else
+	    /* getchar(0) and char avail: return char */
+	    n = plain_vgetc();
+
+	if (n == K_IGNORE)
+	    continue;
+	break;
+    }
+    --no_mapping;
+    --allow_keys;
+
+    set_vim_var_nr(VV_MOUSE_WIN, 0);
+    set_vim_var_nr(VV_MOUSE_WINID, 0);
+    set_vim_var_nr(VV_MOUSE_LNUM, 0);
+    set_vim_var_nr(VV_MOUSE_COL, 0);
+
+    rettv->vval.v_number = n;
+    if (IS_SPECIAL(n) || mod_mask != 0)
+    {
+	char_u		temp[10];   /* modifier: 3, mbyte-char: 6, NUL: 1 */
+	int		i = 0;
+
+	/* Turn a special key into three bytes, plus modifier. */
+	if (mod_mask != 0)
+	{
+	    temp[i++] = K_SPECIAL;
+	    temp[i++] = KS_MODIFIER;
+	    temp[i++] = mod_mask;
+	}
+	if (IS_SPECIAL(n))
+	{
+	    temp[i++] = K_SPECIAL;
+	    temp[i++] = K_SECOND(n);
+	    temp[i++] = K_THIRD(n);
+	}
+	else if (has_mbyte)
+	    i += (*mb_char2bytes)(n, temp + i);
+	else
+	    temp[i++] = n;
+	temp[i++] = NUL;
+	rettv->v_type = VAR_STRING;
+	rettv->vval.v_string = vim_strsave(temp);
+
+#ifdef FEAT_MOUSE
+	if (is_mouse_key(n))
+	{
+	    int		row = mouse_row;
+	    int		col = mouse_col;
+	    win_T	*win;
+	    linenr_T	lnum;
+	    win_T	*wp;
+	    int		winnr = 1;
+
+	    if (row >= 0 && col >= 0)
+	    {
+		/* Find the window at the mouse coordinates and compute the
+		 * text position. */
+		win = mouse_find_win(&row, &col, FIND_POPUP);
+		if (win == NULL)
+		    return;
+		(void)mouse_comp_pos(win, &row, &col, &lnum, NULL);
+# ifdef FEAT_TEXT_PROP
+		if (WIN_IS_POPUP(win))
+		    winnr = 0;
+		else
+# endif
+		    for (wp = firstwin; wp != win && wp != NULL;
+							       wp = wp->w_next)
+			++winnr;
+		set_vim_var_nr(VV_MOUSE_WIN, winnr);
+		set_vim_var_nr(VV_MOUSE_WINID, win->w_id);
+		set_vim_var_nr(VV_MOUSE_LNUM, lnum);
+		set_vim_var_nr(VV_MOUSE_COL, col + 1);
+	    }
+	}
+#endif
+    }
+}
+
+/*
+ * "getcharmod()" function
+ */
+    void
+f_getcharmod(typval_T *argvars UNUSED, typval_T *rettv)
+{
+    rettv->vval.v_number = mod_mask;
+}
+#endif // FEAT_EVAL
+
+#if defined(MESSAGE_QUEUE) || defined(PROTO)
+# define MAX_REPEAT_PARSE 8
+
+/*
+ * Process messages that have been queued for netbeans or clientserver.
+ * Also check if any jobs have ended.
+ * These functions can call arbitrary vimscript and should only be called when
+ * it is safe to do so.
+ */
+    void
+parse_queued_messages(void)
+{
+    int	    old_curwin_id = curwin->w_id;
+    int	    old_curbuf_fnum = curbuf->b_fnum;
+    int	    i;
+    int	    save_may_garbage_collect = may_garbage_collect;
+
+    // Do not handle messages while redrawing, because it may cause buffers to
+    // change or be wiped while they are being redrawn.
+    if (updating_screen)
+	return;
+
+    // may_garbage_collect is set in main_loop() to do garbage collection when
+    // blocking to wait on a character.  We don't want that while parsing
+    // messages, a callback may invoke vgetc() while lists and dicts are in use
+    // in the call stack.
+    may_garbage_collect = FALSE;
+
+    // Loop when a job ended, but don't keep looping forever.
+    for (i = 0; i < MAX_REPEAT_PARSE; ++i)
+    {
+	// For Win32 mch_breakcheck() does not check for input, do it here.
+# if defined(MSWIN) && defined(FEAT_JOB_CHANNEL)
+	channel_handle_events(FALSE);
+# endif
+
+# ifdef FEAT_NETBEANS_INTG
+	// Process the queued netbeans messages.
+	netbeans_parse_messages();
+# endif
+# ifdef FEAT_JOB_CHANNEL
+	// Write any buffer lines still to be written.
+	channel_write_any_lines();
+
+	// Process the messages queued on channels.
+	channel_parse_messages();
+# endif
+# if defined(FEAT_CLIENTSERVER) && defined(FEAT_X11)
+	// Process the queued clientserver messages.
+	server_parse_messages();
+# endif
+# ifdef FEAT_JOB_CHANNEL
+	// Check if any jobs have ended.  If so, repeat the above to handle
+	// changes, e.g. stdin may have been closed.
+	if (job_check_ended())
+	    continue;
+# endif
+# ifdef FEAT_TERMINAL
+	free_unused_terminals();
+# endif
+# ifdef FEAT_SOUND_CANBERRA
+	if (has_sound_callback_in_queue())
+	    invoke_sound_callback();
+# endif
+	break;
+    }
+
+    may_garbage_collect = save_may_garbage_collect;
+
+    // If the current window or buffer changed we need to bail out of the
+    // waiting loop.  E.g. when a job exit callback closes the terminal window.
+    if (curwin->w_id != old_curwin_id || curbuf->b_fnum != old_curbuf_fnum)
+	ins_char_typebuf(K_IGNORE);
+}
+#endif
+
+
 typedef enum {
     map_result_fail,    // failed, break loop
     map_result_get,     // get a character from typeahead
@@ -3016,7 +3215,6 @@ inchar(
 #endif
 	    )
     {
-
 #ifdef MESSAGE_QUEUE
 	parse_queued_messages();
 #endif