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#ifndef SRC_HANDLE_WRAP_H_
#define SRC_HANDLE_WRAP_H_
#include "async-wrap.h"
#include "util.h"
#include "uv.h"
#include "v8.h"
namespace node {
class Environment;
// Rules:
//
// - Do not throw from handle methods. Set errno.
//
// - MakeCallback may only be made directly off the event loop.
// That is there can be no JavaScript stack frames underneath it.
// (Is there any way to assert that?)
//
// - No use of v8::WeakReferenceCallback. The close callback signifies that
// we're done with a handle - external resources can be freed.
//
// - Reusable?
//
// - The uv_close_cb is used to free the c++ object. The close callback
// is not made into javascript land.
//
// - uv_ref, uv_unref counts are managed at this layer to avoid needless
// js/c++ boundary crossing. At the javascript layer that should all be
// taken care of.
class HandleWrap : public AsyncWrap {
public:
static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Ref(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Unref(const v8::FunctionCallbackInfo<v8::Value>& args);
static inline bool IsAlive(const HandleWrap* wrap) {
return wrap != nullptr && wrap->GetHandle() != nullptr;
}
inline uv_handle_t* GetHandle() const { return handle__; }
protected:
HandleWrap(Environment* env,
v8::Local<v8::Object> object,
uv_handle_t* handle,
AsyncWrap::ProviderType provider,
AsyncWrap* parent = nullptr);
virtual ~HandleWrap() override;
private:
friend class Environment;
friend void GetActiveHandles(const v8::FunctionCallbackInfo<v8::Value>&);
static void OnClose(uv_handle_t* handle);
ListNode<HandleWrap> handle_wrap_queue_;
unsigned int flags_;
// Using double underscore due to handle_ member in tcp_wrap. Probably
// tcp_wrap should rename it's member to 'handle'.
uv_handle_t* handle__;
static const unsigned int kUnref = 1;
static const unsigned int kCloseCallback = 2;
};
} // namespace node
#endif // SRC_HANDLE_WRAP_H_