YQ Connector: support managed ClickHouse

Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.

1 files changed, 221 insertions, 0 deletions

diff --git a/contrib/libs/llvm16/lib/Support/ThreadPool.cpp b/contrib/libs/llvm16/lib/Support/ThreadPool.cpp
new file mode 100644
index 0000000000..31461e31c6
--- /dev/null
+++ b/contrib/libs/llvm16/lib/Support/ThreadPool.cpp
@@ -0,0 +1,221 @@
+//==-- llvm/Support/ThreadPool.cpp - A ThreadPool implementation -*- C++ -*-==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements a crude C++11 based thread pool.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/ThreadPool.h"
+
+#include "llvm/Config/llvm-config.h"
+
+#if LLVM_ENABLE_THREADS
+#include "llvm/Support/Threading.h"
+#else
+#include "llvm/Support/raw_ostream.h"
+#endif
+
+using namespace llvm;
+
+#if LLVM_ENABLE_THREADS
+
+// A note on thread groups: Tasks are by default in no group (represented
+// by nullptr ThreadPoolTaskGroup pointer in the Tasks queue) and functionality
+// here normally works on all tasks regardless of their group (functions
+// in that case receive nullptr ThreadPoolTaskGroup pointer as argument).
+// A task in a group has a pointer to that ThreadPoolTaskGroup in the Tasks
+// queue, and functions called to work only on tasks from one group take that
+// pointer.
+
+ThreadPool::ThreadPool(ThreadPoolStrategy S)
+    : Strategy(S), MaxThreadCount(S.compute_thread_count()) {}
+
+void ThreadPool::grow(int requested) {
+  llvm::sys::ScopedWriter LockGuard(ThreadsLock);
+  if (Threads.size() >= MaxThreadCount)
+    return; // Already hit the max thread pool size.
+  int newThreadCount = std::min<int>(requested, MaxThreadCount);
+  while (static_cast<int>(Threads.size()) < newThreadCount) {
+    int ThreadID = Threads.size();
+    Threads.emplace_back([this, ThreadID] {
+      Strategy.apply_thread_strategy(ThreadID);
+      processTasks(nullptr);
+    });
+  }
+}
+
+#ifndef NDEBUG
+// The group of the tasks run by the current thread.
+static LLVM_THREAD_LOCAL std::vector<ThreadPoolTaskGroup *>
+    *CurrentThreadTaskGroups = nullptr;
+#endif
+
+// WaitingForGroup == nullptr means all tasks regardless of their group.
+void ThreadPool::processTasks(ThreadPoolTaskGroup *WaitingForGroup) {
+  while (true) {
+    std::function<void()> Task;
+    ThreadPoolTaskGroup *GroupOfTask;
+    {
+      std::unique_lock<std::mutex> LockGuard(QueueLock);
+      bool workCompletedForGroup = false; // Result of workCompletedUnlocked()
+      // Wait for tasks to be pushed in the queue
+      QueueCondition.wait(LockGuard, [&] {
+        return !EnableFlag || !Tasks.empty() ||
+               (WaitingForGroup != nullptr &&
+                (workCompletedForGroup =
+                     workCompletedUnlocked(WaitingForGroup)));
+      });
+      // Exit condition
+      if (!EnableFlag && Tasks.empty())
+        return;
+      if (WaitingForGroup != nullptr && workCompletedForGroup)
+        return;
+      // Yeah, we have a task, grab it and release the lock on the queue
+
+      // We first need to signal that we are active before popping the queue
+      // in order for wait() to properly detect that even if the queue is
+      // empty, there is still a task in flight.
+      ++ActiveThreads;
+      Task = std::move(Tasks.front().first);
+      GroupOfTask = Tasks.front().second;
+      // Need to count active threads in each group separately, ActiveThreads
+      // would never be 0 if waiting for another group inside a wait.
+      if (GroupOfTask != nullptr)
+        ++ActiveGroups[GroupOfTask]; // Increment or set to 1 if new item
+      Tasks.pop_front();
+    }
+#ifndef NDEBUG
+    if (CurrentThreadTaskGroups == nullptr)
+      CurrentThreadTaskGroups = new std::vector<ThreadPoolTaskGroup *>;
+    CurrentThreadTaskGroups->push_back(GroupOfTask);
+#endif
+
+    // Run the task we just grabbed
+    Task();
+
+#ifndef NDEBUG
+    CurrentThreadTaskGroups->pop_back();
+    if (CurrentThreadTaskGroups->empty()) {
+      delete CurrentThreadTaskGroups;
+      CurrentThreadTaskGroups = nullptr;
+    }
+#endif
+
+    bool Notify;
+    bool NotifyGroup;
+    {
+      // Adjust `ActiveThreads`, in case someone waits on ThreadPool::wait()
+      std::lock_guard<std::mutex> LockGuard(QueueLock);
+      --ActiveThreads;
+      if (GroupOfTask != nullptr) {
+        auto A = ActiveGroups.find(GroupOfTask);
+        if (--(A->second) == 0)
+          ActiveGroups.erase(A);
+      }
+      Notify = workCompletedUnlocked(GroupOfTask);
+      NotifyGroup = GroupOfTask != nullptr && Notify;
+    }
+    // Notify task completion if this is the last active thread, in case
+    // someone waits on ThreadPool::wait().
+    if (Notify)
+      CompletionCondition.notify_all();
+    // If this was a task in a group, notify also threads waiting for tasks
+    // in this function on QueueCondition, to make a recursive wait() return
+    // after the group it's been waiting for has finished.
+    if (NotifyGroup)
+      QueueCondition.notify_all();
+  }
+}
+
+bool ThreadPool::workCompletedUnlocked(ThreadPoolTaskGroup *Group) const {
+  if (Group == nullptr)
+    return !ActiveThreads && Tasks.empty();
+  return ActiveGroups.count(Group) == 0 &&
+         !llvm::any_of(Tasks,
+                       [Group](const auto &T) { return T.second == Group; });
+}
+
+void ThreadPool::wait() {
+  assert(!isWorkerThread()); // Would deadlock waiting for itself.
+  // Wait for all threads to complete and the queue to be empty
+  std::unique_lock<std::mutex> LockGuard(QueueLock);
+  CompletionCondition.wait(LockGuard,
+                           [&] { return workCompletedUnlocked(nullptr); });
+}
+
+void ThreadPool::wait(ThreadPoolTaskGroup &Group) {
+  // Wait for all threads in the group to complete.
+  if (!isWorkerThread()) {
+    std::unique_lock<std::mutex> LockGuard(QueueLock);
+    CompletionCondition.wait(LockGuard,
+                             [&] { return workCompletedUnlocked(&Group); });
+    return;
+  }
+  // Make sure to not deadlock waiting for oneself.
+  assert(CurrentThreadTaskGroups == nullptr ||
+         !llvm::is_contained(*CurrentThreadTaskGroups, &Group));
+  // Handle the case of recursive call from another task in a different group,
+  // in which case process tasks while waiting to keep the thread busy and avoid
+  // possible deadlock.
+  processTasks(&Group);
+}
+
+bool ThreadPool::isWorkerThread() const {
+  llvm::sys::ScopedReader LockGuard(ThreadsLock);
+  llvm::thread::id CurrentThreadId = llvm::this_thread::get_id();
+  for (const llvm::thread &Thread : Threads)
+    if (CurrentThreadId == Thread.get_id())
+      return true;
+  return false;
+}
+
+// The destructor joins all threads, waiting for completion.
+ThreadPool::~ThreadPool() {
+  {
+    std::unique_lock<std::mutex> LockGuard(QueueLock);
+    EnableFlag = false;
+  }
+  QueueCondition.notify_all();
+  llvm::sys::ScopedReader LockGuard(ThreadsLock);
+  for (auto &Worker : Threads)
+    Worker.join();
+}
+
+#else // LLVM_ENABLE_THREADS Disabled
+
+// No threads are launched, issue a warning if ThreadCount is not 0
+ThreadPool::ThreadPool(ThreadPoolStrategy S) : MaxThreadCount(1) {
+  int ThreadCount = S.compute_thread_count();
+  if (ThreadCount != 1) {
+    errs() << "Warning: request a ThreadPool with " << ThreadCount
+           << " threads, but LLVM_ENABLE_THREADS has been turned off\n";
+  }
+}
+
+void ThreadPool::wait() {
+  // Sequential implementation running the tasks
+  while (!Tasks.empty()) {
+    auto Task = std::move(Tasks.front().first);
+    Tasks.pop_front();
+    Task();
+  }
+}
+
+void ThreadPool::wait(ThreadPoolTaskGroup &) {
+  // Simply wait for all, this works even if recursive (the running task
+  // is already removed from the queue).
+  wait();
+}
+
+bool ThreadPool::isWorkerThread() const {
+  report_fatal_error("LLVM compiled without multithreading");
+}
+
+ThreadPool::~ThreadPool() { wait(); }
+
+#endif