From 82cc71261d3d32012d33d3bebe56ca5e3b0bcdbd Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sun, 2 Oct 2022 15:32:49 -0700
Subject: Initial commit.

---
 infra/pipetrace.h | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 infra/pipetrace.h

(limited to 'infra/pipetrace.h')

diff --git a/infra/pipetrace.h b/infra/pipetrace.h
new file mode 100644
index 0000000..656b9b9
--- /dev/null
+++ b/infra/pipetrace.h
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <cstdint>
+#include <fmt/format.h>
+#include <ostream>
+#include <string>
+
+namespace infra {
+    struct transaction {
+        std::uint64_t record = ~(std::uint64_t)0;
+    };
+
+    struct pt {
+        static std::ostream *ptfile;
+
+        static std::uint64_t next_record;
+
+        static transaction toplevel() {
+            transaction t;
+            t.record = next_record++;
+            return t;
+        }
+
+        static transaction child(const transaction &p) {
+            transaction t;
+            t.record = next_record++;
+            if (ptfile)
+                *ptfile << fmt::format("{} parent {}\n", t.record, p.record);
+            return t;
+        }
+
+        static void event(const transaction &t, const char *event, std::uint64_t time, const std::string &data) {
+            if (ptfile)
+                *ptfile << fmt::format("@{} {} {} {}\n", time, t.record, event, data);
+        }
+    };
+}
-- 
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