remove directory tools/clib (#21250)

old-commit-hash: 06625f3a0e

tools/clib/channel.h

@@ -1,35 +0,0 @@
-#ifndef CHANNEL_HPP
-#define CHANNEL_HPP
-
-#include <mutex>
-#include <list>
-#include <condition_variable>
-
-template<class item>
-class channel {
-private:
-  std::list<item> queue;
-  std::mutex m;
-  std::condition_variable cv;
-public:
-  void put(const item &i) {
-    std::unique_lock<std::mutex> lock(m);
-    queue.push_back(i);
-    cv.notify_one();
-  }
-  void put_front(const item &i) {
-    std::unique_lock<std::mutex> lock(m);
-    queue.push_front(i);
-    cv.notify_one();
-  }
-  item get() {
-    std::unique_lock<std::mutex> lock(m);
-    cv.wait(lock, [&](){ return !queue.empty(); });
-    item result = queue.front();
-    queue.pop_front();
-    return result;
-  }
-};
-
-#endif
-