c4c3a19d85
The following produces a reference cycle:
var map = new mbgl.Map({
request: function () { ... }
});
map has a reference to the request function, which has a reference to
its closure, which has a reference to map.
Storing a the map options in an internal field, rather than a Persistent,
allows V8 to collect the reference cycle when none of its members have
other references.
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
#pragma once
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#include <mbgl/map/map.hpp>
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#include <mbgl/storage/file_source.hpp>
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#include <mbgl/platform/default/headless_view.hpp>
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#pragma GCC diagnostic ignored "-Wshadow"
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#pragma GCC diagnostic ignored "-Wnested-anon-types"
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#include <nan.h>
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#pragma GCC diagnostic pop
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#include <queue>
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namespace node_mbgl {
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class NodeMap : public Nan::ObjectWrap,
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public mbgl::FileSource {
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public:
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struct RenderOptions;
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class RenderWorker;
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static NAN_MODULE_INIT(Init);
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static NAN_METHOD(New);
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static NAN_METHOD(Load);
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static NAN_METHOD(Render);
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static NAN_METHOD(Release);
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static NAN_METHOD(DumpDebugLogs);
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void startRender(std::unique_ptr<NodeMap::RenderOptions> options);
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void renderFinished();
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void release();
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inline bool isLoaded() { return loaded; }
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inline bool isValid() { return valid; }
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static std::unique_ptr<NodeMap::RenderOptions> ParseOptions(v8::Local<v8::Object>);
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static Nan::Persistent<v8::Function> constructor;
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NodeMap(v8::Local<v8::Object>);
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~NodeMap();
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std::unique_ptr<mbgl::FileRequest> request(const mbgl::Resource&, Callback);
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mbgl::HeadlessView view;
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std::unique_ptr<mbgl::Map> map;
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std::exception_ptr error;
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std::unique_ptr<const mbgl::StillImage> image;
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std::unique_ptr<Nan::Callback> callback;
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// Async for delivering the notifications of render completion.
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uv_async_t *async;
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bool loaded = false;
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bool valid = true;
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};
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}
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