[balsa/gtk3] Warn when locking a subthread

[Peter Bloomfield <PeterB src gnome org>]

commit 82f0d6822a2f7eded61986f18df6219bb2f3787d
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Thu Jun 7 19:03:46 2012 -0400

    Warn when locking a subthread
    
    	* libbalsa/libbalsa.c (libbalsa_threads_enter): warn when
    	locking a subthread, to help find bad code paths.

 ChangeLog           |    5 +++++
 libbalsa/libbalsa.c |    3 +++
 2 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 3550235..a8b005d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,10 @@
 2012-06-07  Peter Bloomfield
 
+	* libbalsa/libbalsa.c (libbalsa_threads_enter): warn when
+	locking a subthread, to help find bad code paths.
+
+2012-06-07  Peter Bloomfield
+
 	* src/main-window.c: check for NULL index.
 
 2012-06-07  Peter Bloomfield
diff --git a/libbalsa/libbalsa.c b/libbalsa/libbalsa.c
index 9c5aec3..c81ac13 100644
--- a/libbalsa/libbalsa.c
+++ b/libbalsa/libbalsa.c
@@ -758,6 +758,9 @@ libbalsa_threads_enter(void)
 
     self = pthread_self();
 
+    if (libbalsa_am_i_subthread())
+        g_warning("Locking a subthread");
+
     if (self != libbalsa_threads_id) {
         pthread_mutex_lock(&libbalsa_threads_mutex);
         libbalsa_threads_id = self;