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94 lines
3.2 KiB
94 lines
3.2 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SRC_HANDLE_WRAP_H_
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#define SRC_HANDLE_WRAP_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include "async-wrap.h"
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#include "util.h"
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#include "uv.h"
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#include "v8.h"
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namespace node {
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class Environment;
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// Rules:
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//
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// - Do not throw from handle methods. Set errno.
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//
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// - MakeCallback may only be made directly off the event loop.
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// That is there can be no JavaScript stack frames underneath it.
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// (Is there any way to assert that?)
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//
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// - No use of v8::WeakReferenceCallback. The close callback signifies that
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// we're done with a handle - external resources can be freed.
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//
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// - Reusable?
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//
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// - The uv_close_cb is used to free the c++ object. The close callback
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// is not made into javascript land.
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//
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// - uv_ref, uv_unref counts are managed at this layer to avoid needless
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// js/c++ boundary crossing. At the javascript layer that should all be
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// taken care of.
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class HandleWrap : public AsyncWrap {
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public:
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static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);
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static void Ref(const v8::FunctionCallbackInfo<v8::Value>& args);
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static void Unref(const v8::FunctionCallbackInfo<v8::Value>& args);
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static void HasRef(const v8::FunctionCallbackInfo<v8::Value>& args);
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static inline bool IsAlive(const HandleWrap* wrap) {
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return wrap != nullptr && wrap->state_ != kClosed;
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}
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static inline bool HasRef(const HandleWrap* wrap) {
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return IsAlive(wrap) && uv_has_ref(wrap->GetHandle());
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}
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inline uv_handle_t* GetHandle() const { return handle_; }
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protected:
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HandleWrap(Environment* env,
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v8::Local<v8::Object> object,
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uv_handle_t* handle,
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AsyncWrap::ProviderType provider);
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~HandleWrap() override;
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private:
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friend class Environment;
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friend void GetActiveHandles(const v8::FunctionCallbackInfo<v8::Value>&);
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static void OnClose(uv_handle_t* handle);
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ListNode<HandleWrap> handle_wrap_queue_;
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enum { kInitialized, kClosing, kClosingWithCallback, kClosed } state_;
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uv_handle_t* const handle_;
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};
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} // namespace node
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#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif // SRC_HANDLE_WRAP_H_
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