38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
#include <mbgl/storage/file_source.hpp>
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#include <mbgl/storage/resource_options.hpp>
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#include <mbgl/util/string.hpp>
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#include <mutex>
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#include <map>
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namespace mbgl {
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std::shared_ptr<FileSource> FileSource::getSharedFileSource(const ResourceOptions& options) {
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static std::mutex mutex;
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static std::map<std::string, std::weak_ptr<mbgl::FileSource>> fileSources;
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std::lock_guard<std::mutex> lock(mutex);
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// Purge entries no longer in use.
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for (auto it = fileSources.begin(); it != fileSources.end();) {
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it = it->second.expired() ? fileSources.erase(it) : ++it;
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}
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const auto context = reinterpret_cast<uint64_t>(options.platformContext());
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const std::string key = options.baseURL() + '|' + options.accessToken() + '|' + options.cachePath() + '|' + util::toString(context);
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std::shared_ptr<mbgl::FileSource> fileSource;
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auto tuple = fileSources.find(key);
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if (tuple != fileSources.end()) {
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fileSource = tuple->second.lock();
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}
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if (!fileSource) {
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fileSources[key] = fileSource = createPlatformFileSource(options);
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}
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return fileSource;
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}
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} // namespace mbgl
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