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If we don't do this, we can activate a request twice. The issue here is that we use memory address as the 'key'. So if we destroy a request, another request might take the same memory address, or the same 'key'. The entry at 'pendingRequests' survives the 'cancel()' and is ultimatelly removed at 'activatePendingRequest()'. This is fine unless a request is created using the same 'key' before we call 'activatePendingRequest()'. The check if the request was canceled at 'activatePendingRequest()' will be no longer valid, activating the request. At the same time the request will be activated again by the task scheduled at the constructor of the 'OnlineFileRequestImpl' class.
Mapbox GL Native
A library for embedding interactive, customizable vector maps into native applications on multiple platforms. It takes stylesheets that conform to the Mapbox GL Style Specification, applies them to vector tiles that conform to the Mapbox Vector Tile Specification, and renders them using OpenGL. Mapbox GL JS is the WebGL-based counterpart, designed for use on the Web.
The Mapbox GL ecosystem
This repository hosts the cross-platform Mapbox GL Native library, plus convenient SDKs for several platforms. The cross-platform library comes with a GLFW-based demo application for Ubuntu Linux and OS X. The SDKs target the usual languages on their respective platforms:
| SDK | Languages | Build status |
|---|---|---|
| Mapbox GL Native | C++14 |  |
| Mapbox Android SDK | Java |  |
| Mapbox iOS SDK | Objective-C or Swift |  |
| Mapbox OS X SDK | Objective-C or Swift |  |
| node-mapbox-gl-native | Node.js | |
Additional Mapbox GL Native–based libraries are developed outside of this repository:
- React Native Mapbox GL for React Native applications on iOS and Android
- QMapboxGL for Qt-based applications
- Telerik’s Mapbox plugin for Apache Cordova Hybrid applications
- Telerik’s Mapbox plugin for NativeScript Hybrid applications
- Xamarin's Mapbox component for Xamarin Hybrid applications
If your platform or hybrid application framework isn’t listed here, consider embedding Mapbox GL JS using the standard Web capabilities on your platform.