From b34360471571ea7346ab1c6cb87700a920ca5798 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Sun, 21 Nov 2010 14:33:58 -0500
Subject: Fixing flowgraph dump to clean it up (via patch from eb). Also added
note about mutex locking in prune_tags.
---
gnuradio-core/src/lib/runtime/gr_buffer.cc | 8 ++++++++
1 file changed, 8 insertions(+)
(limited to 'gnuradio-core/src/lib/runtime/gr_buffer.cc')
diff --git a/gnuradio-core/src/lib/runtime/gr_buffer.cc b/gnuradio-core/src/lib/runtime/gr_buffer.cc
index 1488e92f6b..0b2eb52a0d 100644
--- a/gnuradio-core/src/lib/runtime/gr_buffer.cc
+++ b/gnuradio-core/src/lib/runtime/gr_buffer.cc
@@ -231,6 +231,14 @@ gr_buffer::add_item_tag(const pmt::pmt_t &tag)
void
gr_buffer::prune_tags(uint64_t max_time)
{
+ /* NOTE: this function _should_ lock the mutex before editing
+ d_item_tags. In practice, this function is only called at
+ runtime by min_available_space in gr_block_executor.cc,
+ which locks the mutex itself.
+
+ If this function is used elsewhere, remember to lock the
+ buffer's mutex al la the scoped_lock line below.
+ */
//gruel::scoped_lock guard(*mutex());
int n = 0;
--
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