package java.lang.invoke;
import jdk.internal.access.foreign.MemorySegmentProxy;
import jdk.internal.misc.ScopedMemoryAccess;
import jdk.internal.vm.annotation.ForceInline;
import java.lang.ref.Reference;
import java.util.Objects;
import static java.lang.invoke.MethodHandleStatics.UNSAFE;
final class MemoryAccessVarHandleDoubleHelper extends MemoryAccessVarHandleBase {
static final boolean BE = UNSAFE.isBigEndian();
static final ScopedMemoryAccess SCOPED_MEMORY_ACCESS = ScopedMemoryAccess.getScopedMemoryAccess();
static final int VM_ALIGN = Double.BYTES - 1;
static final VarForm FORM = new VarForm(MemoryAccessVarHandleDoubleHelper.class, MemorySegmentProxy.class, double.class, long.class);
MemoryAccessVarHandleDoubleHelper(boolean skipAlignmentMaskCheck, boolean be, long length, long alignmentMask, boolean exact) {
super(FORM, skipAlignmentMaskCheck, be, length, alignmentMask, exact);
}
@Override
final MethodType accessModeTypeUncached(VarHandle.AccessType accessType) {
return accessType.accessModeType(MemorySegmentProxy.class, double.class, long.class);
}
@Override
public MemoryAccessVarHandleDoubleHelper withInvokeExactBehavior() {
return hasInvokeExactBehavior() ?
this :
new MemoryAccessVarHandleDoubleHelper(skipAlignmentMaskCheck, be, length, alignmentMask, true);
}
@Override
public MemoryAccessVarHandleDoubleHelper withInvokeBehavior() {
return !hasInvokeExactBehavior() ?
this :
new MemoryAccessVarHandleDoubleHelper(skipAlignmentMaskCheck, be, length, alignmentMask, false);
}
@ForceInline
static long convEndian(boolean big, double v) {
long rv = Double.doubleToRawLongBits(v);
return big == BE ? rv : Long.reverseBytes(rv);
}
@ForceInline
static double convEndian(boolean big, long rv) {
rv = big == BE ? rv : Long.reverseBytes(rv);
return Double.longBitsToDouble(rv);
}
@ForceInline
static MemorySegmentProxy checkAddress(Object obb, long offset, long length, boolean ro) {
MemorySegmentProxy oo = (MemorySegmentProxy)Objects.requireNonNull(obb);
oo.checkAccess(offset, length, ro);
return oo;
}
@ForceInline
static long offset(boolean skipAlignmentMaskCheck, MemorySegmentProxy bb, long offset, long alignmentMask) {
long address = offsetNoVMAlignCheck(skipAlignmentMaskCheck, bb, offset, alignmentMask);
if ((address & VM_ALIGN) != 0) {
throw MemoryAccessVarHandleBase.newIllegalStateExceptionForMisalignedAccess(address);
}
return address;
}
@ForceInline
static long offsetNoVMAlignCheck(boolean skipAlignmentMaskCheck, MemorySegmentProxy bb, long offset, long alignmentMask) {
long base = bb.unsafeGetOffset();
long address = base + offset;
if (skipAlignmentMaskCheck) {
if ((base & alignmentMask) != 0) {
throw MemoryAccessVarHandleBase.newIllegalStateExceptionForMisalignedAccess(address);
}
} else {
if ((address & alignmentMask) != 0) {
throw MemoryAccessVarHandleBase.newIllegalStateExceptionForMisalignedAccess(address);
}
}
return address;
}
@ForceInline
static double get(VarHandle ob, Object obb, long base) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, true);
long rawValue = SCOPED_MEMORY_ACCESS.getLongUnaligned(bb.scope(),
bb.unsafeGetBase(),
offsetNoVMAlignCheck(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
handle.be);
return Double.longBitsToDouble(rawValue);
}
@ForceInline
static void set(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
SCOPED_MEMORY_ACCESS.putLongUnaligned(bb.scope(),
bb.unsafeGetBase(),
offsetNoVMAlignCheck(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
Double.doubleToRawLongBits(value),
handle.be);
}
@ForceInline
static double getVolatile(VarHandle ob, Object obb, long base) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, true);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getLongVolatile(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask)));
}
@ForceInline
static void setVolatile(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
SCOPED_MEMORY_ACCESS.putLongVolatile(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value));
}
@ForceInline
static double getAcquire(VarHandle ob, Object obb, long base) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, true);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getLongAcquire(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask)));
}
@ForceInline
static void setRelease(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
SCOPED_MEMORY_ACCESS.putLongRelease(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value));
}
@ForceInline
static double getOpaque(VarHandle ob, Object obb, long base) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, true);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getLongOpaque(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask)));
}
@ForceInline
static void setOpaque(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
SCOPED_MEMORY_ACCESS.putLongOpaque(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value));
}
@ForceInline
static boolean compareAndSet(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return SCOPED_MEMORY_ACCESS.compareAndSetLong(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value));
}
@ForceInline
static double compareAndExchange(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.compareAndExchangeLong(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value)));
}
@ForceInline
static double compareAndExchangeAcquire(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.compareAndExchangeLongAcquire(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value)));
}
@ForceInline
static double compareAndExchangeRelease(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.compareAndExchangeLongRelease(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value)));
}
@ForceInline
static boolean weakCompareAndSetPlain(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return SCOPED_MEMORY_ACCESS.weakCompareAndSetLongPlain(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value));
}
@ForceInline
static boolean weakCompareAndSet(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return SCOPED_MEMORY_ACCESS.weakCompareAndSetLong(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value));
}
@ForceInline
static boolean weakCompareAndSetAcquire(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return SCOPED_MEMORY_ACCESS.weakCompareAndSetLongAcquire(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value));
}
@ForceInline
static boolean weakCompareAndSetRelease(VarHandle ob, Object obb, long base, double expected, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return SCOPED_MEMORY_ACCESS.weakCompareAndSetLongRelease(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, expected), convEndian(handle.be, value));
}
@ForceInline
static double getAndSet(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getAndSetLong(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value)));
}
@ForceInline
static double getAndSetAcquire(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getAndSetLongAcquire(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value)));
}
@ForceInline
static double getAndSetRelease(VarHandle ob, Object obb, long base, double value) {
MemoryAccessVarHandleBase handle = (MemoryAccessVarHandleBase)ob;
MemorySegmentProxy bb = checkAddress(obb, base, handle.length, false);
return convEndian(handle.be,
SCOPED_MEMORY_ACCESS.getAndSetLongRelease(bb.scope(),
bb.unsafeGetBase(),
offset(handle.skipAlignmentMaskCheck, bb, base, handle.alignmentMask),
convEndian(handle.be, value)));
}
}