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package com.oracle.svm.hosted.c;
import org.graalvm.nativeimage.c.struct.SizeOf;
import org.graalvm.nativeimage.impl.SizeOfSupport;
import org.graalvm.word.PointerBase;
import com.oracle.svm.core.util.UserError;
import com.oracle.svm.hosted.c.info.ElementInfo;
import com.oracle.svm.hosted.c.info.SizableInfo;
import com.oracle.svm.hosted.c.info.StructInfo;
import jdk.vm.ci.meta.MetaAccessProvider;
import jdk.vm.ci.meta.ResolvedJavaType;
public final class SizeOfSupportImpl implements SizeOfSupport {
private final NativeLibraries nativeLibraries;
private final MetaAccessProvider metaAccess;
public SizeOfSupportImpl(NativeLibraries nativeLibraries, MetaAccessProvider metaAccess) {
this.nativeLibraries = nativeLibraries;
this.metaAccess = metaAccess;
}
@Override
public int sizeof(Class<? extends PointerBase> clazz) {
ResolvedJavaType type = metaAccess.lookupJavaType(clazz);
ElementInfo typeInfo = nativeLibraries.findElementInfo(type);
if (typeInfo instanceof StructInfo && ((StructInfo) typeInfo).isIncomplete()) {
throw UserError.abort("Class parameter %s of call to %s is an incomplete structure, so no size is available", type.toJavaName(true), SizeOf.class.getSimpleName());
} else if (typeInfo instanceof SizableInfo) {
return ((SizableInfo) typeInfo).getSizeInfo().getProperty();
} else {
throw UserError.abort("Class parameter %s of call to %s is not an annotated C interface type", type.toJavaName(true), SizeOf.class.getSimpleName());
}
}
}