From: David Bremner <david@tethera.net>
Date: Mon, 3 Sep 2018 14:00:26 +0000 (-0300)
Subject: lib/thread: add macro for debug printing of threading
X-Git-Tag: debian/0.28_rc0-1~32
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=040fd630bf74eb8be75633bf3cbdb0c38d0f16f2;ds=sidebyside

lib/thread: add macro for debug printing of threading

This is analogous to DEBUG_DATABASE_SANITY, and is intended to help
debugging and to help users submit bug reports.
---

diff --git a/lib/notmuch-private.h b/lib/notmuch-private.h
index bd9d2747..02cc0e09 100644
--- a/lib/notmuch-private.h
+++ b/lib/notmuch-private.h
@@ -56,6 +56,7 @@ NOTMUCH_BEGIN_DECLS
 
 #ifdef DEBUG
 # define DEBUG_DATABASE_SANITY 1
+# define DEBUG_THREADING 1
 # define DEBUG_QUERY 1
 #endif
 
diff --git a/lib/thread.cc b/lib/thread.cc
index b599a97d..6d15c49b 100644
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -24,6 +24,12 @@
 #include <gmime/gmime.h>
 #include <glib.h> /* GHashTable */
 
+#ifdef DEBUG_THREADING
+#define THREAD_DEBUG(format, ...) fprintf(stderr, format " (%s).\n", ##__VA_ARGS__, __location__)
+#else
+#define THREAD_DEBUG(format, ...) do {} while (0) /* ignored */
+#endif
+
 #define EMPTY_STRING(s) ((s)[0] == '\0')
 
 struct _notmuch_thread {