intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 67 insertions, 0 deletions

diff --git a/library/cpp/lwtrace/log_shuttle.cpp b/library/cpp/lwtrace/log_shuttle.cpp
new file mode 100644
index 0000000000..695aa90b31
--- /dev/null
+++ b/library/cpp/lwtrace/log_shuttle.cpp
@@ -0,0 +1,67 @@
+#include "log_shuttle.h"
+#include "probes.h"
+
+namespace NLWTrace {
+    LWTRACE_USING(LWTRACE_INTERNAL_PROVIDER);
+
+#ifdef LWTRACE_DISABLE
+
+    template <class TDepot>
+    bool TLogShuttle<TDepot>::DoFork(TShuttlePtr& child) {
+        Y_UNUSED(child);
+        return false;
+    }
+
+    template <class TDepot>
+    bool TLogShuttle<TDepot>::DoJoin(const TShuttlePtr& child) {
+        Y_UNUSED(child);
+        return false;
+    }
+
+#else
+
+    template <class TDepot>
+    bool TLogShuttle<TDepot>::DoFork(TShuttlePtr& child) {
+        if (child = Executor->RentShuttle()) {
+            child->SetParentSpanId(GetSpanId());
+            Executor->Cast(child)->SetIgnore(true);
+            TParams params;
+            params.Param[0].CopyConstruct<ui64>(child->GetSpanId());
+            bool result = DoAddProbe(&LWTRACE_GET_NAME(Fork).Probe, params, 0);
+            TUserSignature<ui64>::DestroyParams(params);
+            return result;
+        }
+        AtomicIncrement(ForkFailed);
+        return false;
+    }
+
+    template <class TDepot>
+    bool TLogShuttle<TDepot>::DoJoin(const TShuttlePtr& shuttle) {
+        auto* child = Executor->Cast(shuttle);
+        TParams params;
+        params.Param[0].CopyConstruct<ui64>(child->GetSpanId());
+        params.Param[1].CopyConstruct<ui64>(child->TrackLog.Items.size());
+        bool result = DoAddProbe(&LWTRACE_GET_NAME(Join).Probe, params, 0);
+        TUserSignature<ui64, ui64>::DestroyParams(params);
+        if (result) {
+            with_lock (Lock) {
+                ssize_t n = MaxTrackLength - TrackLog.Items.size();
+                for (auto& item: child->TrackLog.Items) {
+                    if (n-- <= 0) {
+                        TrackLog.Truncated = true;
+                        break;
+                    }
+                    TrackLog.Items.emplace_back(item);
+                }
+            }
+        }
+        AtomicAdd(ForkFailed, AtomicGet(child->ForkFailed));
+        Executor->ParkShuttle(child);
+        return result;
+    }
+
+#endif
+
+    template class TLogShuttle<TDurationDepot>;
+    template class TLogShuttle<TCyclicDepot>;
+}