astitcher commented on a change in pull request #310:
URL: https://github.com/apache/qpid-proton/pull/310#discussion_r618554739
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File path: cpp/src/sender.cpp
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@@ -60,14 +61,20 @@ class target sender::target() const {
}
namespace {
-// TODO: revisit if thread safety required
-uint64_t tag_counter = 0;
+std::atomic<uint64_t> tag_counter(0);
Review comment:
It would make a lot of sense (from a performance stand point) to have
the tag counter be scoped to the connection in some way (as this is the
serialisation granule of proton).
Is it true that the delivery tags are only scoped to the sender then. So
that different senders can use identical tags? if so we should just make this
connection or more granularly scoped and just zero out the count when we create
a new connection/session/sender/etc.
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