From e6918187568dbd01842d8d1d2c808ce16a894239 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 21 Apr 2024 13:54:28 +0200
Subject: Adding upstream version 18.2.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/rocksdb/test_util/sync_point_impl.h | 96 +++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/rocksdb/test_util/sync_point_impl.h

(limited to 'src/rocksdb/test_util/sync_point_impl.h')

diff --git a/src/rocksdb/test_util/sync_point_impl.h b/src/rocksdb/test_util/sync_point_impl.h
new file mode 100644
index 000000000..64cc0445e
--- /dev/null
+++ b/src/rocksdb/test_util/sync_point_impl.h
@@ -0,0 +1,96 @@
+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+
+#include <assert.h>
+
+#include <atomic>
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <unordered_map>
+#include <unordered_set>
+
+#include "memory/concurrent_arena.h"
+#include "port/port.h"
+#include "test_util/sync_point.h"
+#include "util/dynamic_bloom.h"
+#include "util/random.h"
+
+#pragma once
+
+#ifndef NDEBUG
+namespace ROCKSDB_NAMESPACE {
+// A hacky allocator for single use.
+// Arena depends on SyncPoint and create circular dependency.
+class SingleAllocator : public Allocator {
+ public:
+  char* Allocate(size_t) override {
+    assert(false);
+    return nullptr;
+  }
+  char* AllocateAligned(size_t bytes, size_t, Logger*) override {
+    buf_.resize(bytes);
+    return const_cast<char*>(buf_.data());
+  }
+  size_t BlockSize() const override {
+    assert(false);
+    return 0;
+  }
+
+ private:
+  std::string buf_;
+};
+
+struct SyncPoint::Data {
+  Data() : point_filter_(&alloc_, /*total_bits=*/8192), enabled_(false) {}
+  // Enable proper deletion by subclasses
+  virtual ~Data() {}
+  // successor/predecessor map loaded from LoadDependency
+  std::unordered_map<std::string, std::vector<std::string>> successors_;
+  std::unordered_map<std::string, std::vector<std::string>> predecessors_;
+  std::unordered_map<std::string, std::function<void(void*)>> callbacks_;
+  std::unordered_map<std::string, std::vector<std::string>> markers_;
+  std::unordered_map<std::string, std::thread::id> marked_thread_id_;
+
+  std::mutex mutex_;
+  std::condition_variable cv_;
+  // sync points that have been passed through
+  std::unordered_set<std::string> cleared_points_;
+  SingleAllocator alloc_;
+  // A filter before holding mutex to speed up process.
+  DynamicBloom point_filter_;
+  std::atomic<bool> enabled_;
+  int num_callbacks_running_ = 0;
+
+  void LoadDependency(const std::vector<SyncPointPair>& dependencies);
+  void LoadDependencyAndMarkers(const std::vector<SyncPointPair>& dependencies,
+                                const std::vector<SyncPointPair>& markers);
+  bool PredecessorsAllCleared(const std::string& point);
+  void SetCallBack(const std::string& point,
+                   const std::function<void(void*)>& callback) {
+    std::lock_guard<std::mutex> lock(mutex_);
+    callbacks_[point] = callback;
+    point_filter_.Add(point);
+  }
+
+  void ClearCallBack(const std::string& point);
+  void ClearAllCallBacks();
+  void EnableProcessing() { enabled_ = true; }
+  void DisableProcessing() { enabled_ = false; }
+  void ClearTrace() {
+    std::lock_guard<std::mutex> lock(mutex_);
+    cleared_points_.clear();
+  }
+  bool DisabledByMarker(const std::string& point, std::thread::id thread_id) {
+    auto marked_point_iter = marked_thread_id_.find(point);
+    return marked_point_iter != marked_thread_id_.end() &&
+           thread_id != marked_point_iter->second;
+  }
+  void Process(const Slice& point, void* cb_arg);
+};
+}  // namespace ROCKSDB_NAMESPACE
+#endif  // NDEBUG
-- 
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