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