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8234049: Implementation of Memory Access API (Incubator)

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Co-authored-by: Vlaidmir Ivanov <vladimir.x.ivanov@oracle.com>
Reviewed-by: alanb, psandoz, chegar, rriggs, plevart, briangoetz, jrose, adinn, vlivanov
This commit is contained in:
Jorn Vernee 2019-12-12 22:59:57 +00:00 • committed by Maurizio Cimadamore
parent 7cdecd8981
commit 8f4f088a12
59 changed files with 7849 additions and 147 deletions
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39
src/java.base/share/classes/java/lang/invoke/MethodHandleImpl.java
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@ -41,6 +41,7 @@ import sun.invoke.util.VerifyType;
import sun.invoke.util.Wrapper;
import java.lang.reflect.Array;
import java.nio.ByteOrder;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
@ -1790,6 +1791,44 @@ abstract class MethodHandleImpl {
invokerMethodTypes, callSiteMethodTypes);
}
@Override
public VarHandle memoryAddressViewVarHandle(Class<?> carrier, long alignmentMask,
ByteOrder order, long offset, long[] strides) {
return VarHandles.makeMemoryAddressViewHandle(carrier, alignmentMask, order, offset, strides);
}
@Override
public Class<?> memoryAddressCarrier(VarHandle handle) {
return checkMemAccessHandle(handle).carrier();
}
@Override
public long memoryAddressAlignmentMask(VarHandle handle) {
return checkMemAccessHandle(handle).alignmentMask;
}
@Override
public ByteOrder memoryAddressByteOrder(VarHandle handle) {
return checkMemAccessHandle(handle).be ?
ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN;
}
@Override
public long memoryAddressOffset(VarHandle handle) {
return checkMemAccessHandle(handle).offset;
}
@Override
public long[] memoryAddressStrides(VarHandle handle) {
return checkMemAccessHandle(handle).strides();
}
private VarHandleMemoryAddressBase checkMemAccessHandle(VarHandle handle) {
if (!(handle instanceof VarHandleMemoryAddressBase)) {
throw new IllegalArgumentException("Not a memory access varhandle: " + handle);
}
return (VarHandleMemoryAddressBase) handle;
}
});
}