9781785ab7
we are now scoping all file requests to an environment object. The FileSource implementation treats this as an opaque pointer, but allows canceling all Requests that are associated with that pointer. This is necessary to abort all file requests that originated from a particular Map object. Aborting a file request is different from canceling a file request: A canceled request doesn't have its callback called, while an aborted request will have its callback called with an error, indicating that the environment is going to be shut down.
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
#ifndef MBGL_STORAGE_DEFAULT_REQUEST
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#define MBGL_STORAGE_DEFAULT_REQUEST
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#include <mbgl/storage/resource.hpp>
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#include <mbgl/util/util.hpp>
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#include <mbgl/util/noncopyable.hpp>
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#include <functional>
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#include <memory>
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typedef struct uv_async_s uv_async_t;
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typedef struct uv_loop_s uv_loop_t;
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namespace mbgl {
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class Response;
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class Environment;
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class Request : private util::noncopyable {
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MBGL_STORE_THREAD(tid)
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public:
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using Callback = std::function<void(const Response &)>;
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Request(const Resource &resource, uv_loop_t *loop, const Environment &env, Callback callback);
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public:
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// May be called from any thread.
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void notify(const std::shared_ptr<const Response> &response);
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void destruct();
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// May be called only from the thread the Request was created in.
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void cancel();
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private:
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~Request();
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void invoke();
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static void notifyCallback(uv_async_t *async);
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static void cancelCallback(uv_async_t *async);
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private:
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uv_async_t *notifyAsync = nullptr;
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uv_async_t *destructAsync = nullptr;
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Callback callback;
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std::shared_ptr<const Response> response;
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public:
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const Resource resource;
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// The environment ref is used to associate requests with a particular environment. This allows
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// us to only terminate requests associated with that environment, e.g. when the map the env
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// belongs to is discarded.
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const Environment &env;
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};
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}
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#endif
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