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