[newlib-cygwin] Cygwin: console: Make suspending process work properly.

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=a6e87f589ae113cc3f947eca7db8c6d8c795e3c2

commit a6e87f589ae113cc3f947eca7db8c6d8c795e3c2
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Sun Jan 5 22:25:55 2020 +0900

    Cygwin: console: Make suspending process work properly.
    
    - After commit f4b47827cf87f055687a0c52a3485d42b3e2b941, suspending
      process by Ctrl-Z does not work in console and results in hang up.
      This patch fixes the issue.

Diff:
---
 winsup/cygwin/fhandler_console.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc
index b3095bb..b286c6c 100644
--- a/winsup/cygwin/fhandler_console.cc
+++ b/winsup/cygwin/fhandler_console.cc
@@ -850,7 +850,9 @@ fhandler_console::process_input_message (void)
       if (toadd)
 	{
 	  ssize_t ret;
+	  release_input_mutex ();
 	  line_edit_status res = line_edit (toadd, nread, *ti, &ret);
+	  acquire_input_mutex (INFINITE);
 	  if (res == line_edit_signalled)
 	    {
 	      stat = input_signalled;