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package com.oracle.truffle.nfi;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import org.graalvm.collections.EconomicMap;
import com.oracle.truffle.api.TruffleLanguage.Env;
import com.oracle.truffle.api.nodes.LanguageInfo;
import com.oracle.truffle.nfi.spi.NFIBackend;
import com.oracle.truffle.nfi.spi.NFIBackendFactory;
import com.oracle.truffle.nfi.spi.NFIBackendTools;
final class NFIContext {
private static final class NFIBackendToolsImpl extends NFIBackendTools {
private final String backend;
NFIBackendToolsImpl(String backend) {
this.backend = backend.intern();
}
@Override
public Object createBindableSymbol(Object symbol) {
return NFISymbol.createBindable(backend, symbol);
}
}
Env env;
final EconomicMap<String, API> apiCache = EconomicMap.create();
NFIContext(Env env) {
this.env = env;
}
void patch(Env newEnv) {
this.env = newEnv;
this.apiCache.clear();
}
NFIBackend getBackend(String id) {
return getAPI(id).backend;
}
@TruffleBoundary
API getAPI(String backendId) {
API ret = apiCache.get(backendId);
if (ret != null) {
return ret;
}
synchronized (apiCache) {
ret = apiCache.get(backendId);
if (ret != null) {
return ret;
}
for (LanguageInfo language : env.getInternalLanguages().values()) {
if ("nfi".equals(language.getId())) {
continue;
}
NFIBackendFactory backendFactory = env.lookup(language, NFIBackendFactory.class);
if (backendFactory != null && backendFactory.getBackendId().equals(backendId)) {
// force initialization of the backend language
env.initializeLanguage(language);
NFIBackend backend = backendFactory.createBackend(new NFIBackendToolsImpl(backendId));
API api = new API(backendId, backend);
apiCache.put(backendFactory.getBackendId(), api);
return api;
}
}
}
return null;
}
}