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#ifndef SRC_INSPECTOR_MAIN_THREAD_INTERFACE_H_
#define SRC_INSPECTOR_MAIN_THREAD_INTERFACE_H_
#if !HAVE_INSPECTOR
#error("This header can only be used when inspector is enabled")
#endif
#include "inspector_agent.h"
#include "node_mutex.h"
#include <atomic>
#include <deque>
#include <memory>
#include <unordered_map>
namespace v8_inspector {
class StringBuffer;
class StringView;
} // namespace v8_inspector
namespace node {
namespace inspector {
class MainThreadInterface;
class Request {
public:
virtual void Call(MainThreadInterface*) = 0;
virtual ~Request() = default;
};
class Deletable {
public:
virtual ~Deletable() = default;
};
std::unique_ptr<v8_inspector::StringBuffer> Utf8ToStringView(
const std::string_view message);
using MessageQueue = std::deque<std::unique_ptr<Request>>;
class MainThreadHandle : public std::enable_shared_from_this<MainThreadHandle> {
public:
explicit MainThreadHandle(MainThreadInterface* main_thread)
: main_thread_(main_thread) {
}
~MainThreadHandle() {
Mutex::ScopedLock scoped_lock(block_lock_);
CHECK_NULL(main_thread_); // main_thread_ should have called Reset
}
std::unique_ptr<InspectorSession> Connect(
std::unique_ptr<InspectorSessionDelegate> delegate,
bool prevent_shutdown);
int newObjectId() {
return ++next_object_id_;
}
bool Post(std::unique_ptr<Request> request);
std::unique_ptr<InspectorSessionDelegate> MakeDelegateThreadSafe(
std::unique_ptr<InspectorSessionDelegate> delegate);
bool Expired();
private:
void Reset();
MainThreadInterface* main_thread_;
Mutex block_lock_;
int next_session_id_ = 0;
std::atomic_int next_object_id_ = {1};
friend class MainThreadInterface;
};
class MainThreadInterface :
public std::enable_shared_from_this<MainThreadInterface> {
public:
explicit MainThreadInterface(Agent* agent);
~MainThreadInterface();
void DispatchMessages();
void Post(std::unique_ptr<Request> request);
bool WaitForFrontendEvent();
std::shared_ptr<MainThreadHandle> GetHandle();
Agent* inspector_agent() {
return agent_;
}
void AddObject(int handle, std::unique_ptr<Deletable> object);
Deletable* GetObject(int id);
Deletable* GetObjectIfExists(int id);
void RemoveObject(int handle);
private:
MessageQueue requests_;
Mutex requests_lock_; // requests_ live across threads
// This queue is to maintain the order of the messages for the cases
// when we reenter the DispatchMessages function.
MessageQueue dispatching_message_queue_;
bool dispatching_messages_ = false;
ConditionVariable incoming_message_cond_;
// Used from any thread
Agent* const agent_;
std::shared_ptr<MainThreadHandle> handle_;
std::unordered_map<int, std::unique_ptr<Deletable>> managed_objects_;
};
} // namespace inspector
} // namespace node
#endif // SRC_INSPECTOR_MAIN_THREAD_INTERFACE_H_
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