Class PlatformThreadRef

src/include/base/cef_platform_thread.h:68–82

Used for thread checking and debugging. Meant to be as fast as possible. These are produced by PlatformThread::CurrentRef(), and used to later check if we are on the same thread or not by using ==. These are safe to copy between threads, but can't be copied to another process as they have no meaning there. Also, the internal identifier can be re-used after a thread dies, so a PlatformThreadRef can

// after a thread dies, so a PlatformThreadRef cannot be reliably used
// to distinguish a new thread from an old, dead thread.
class PlatformThreadRef {
 public:
  typedef cef_platform_thread_handle_t RefType;

  PlatformThreadRef() : id_(0) {}

  explicit PlatformThreadRef(RefType id) : id_(id) {}

  bool operator==(PlatformThreadRef other) const { return id_ == other.id_; }

  bool is_null() const { return id_ == 0; }

 private:
  RefType id_;
};

// A namespace for low-level thread functions.
// Chromium uses a class with static methods but CEF uses an actual namespace