Ensure correct ordering of process writes.

* process.c (make_process): Initialize write_queue.
(write_queue_push, write_queue_pop): New functions.
(send_process): Use them to maintain correct ordering of process writes.

Fixes: debbugs:10815

1 files changed, 2 insertions, 0 deletions

diff --git a/src/process.h b/src/process.h
index edb937893b0..ae4b6b61c94 100644
--- a/src/process.h
+++ b/src/process.h
@@ -77,6 +77,8 @@ struct Lisp_Process
     Lisp_Object encode_coding_system;
     /* Working buffer for encoding.  */
     Lisp_Object encoding_buf;
+    /* Queue for storing waiting writes */
+    Lisp_Object write_queue;
 
 #ifdef HAVE_GNUTLS
     Lisp_Object gnutls_cred_type;