private static bool Unsafe_compareAndSwapObject(EmitIntrinsicContext eic)
{
TypeWrapper tw = eic.GetStackTypeWrapper(0, 3);
if (IsSupportedArrayTypeForUnsafeOperation(tw) &&
eic.GetStackTypeWrapper(0, 0).IsAssignableTo(tw.ElementTypeWrapper) &&
eic.GetStackTypeWrapper(0, 1).IsAssignableTo(tw.ElementTypeWrapper))
{
Type type = tw.TypeAsLocalOrStackType.GetElementType();
CodeEmitterLocal update = eic.Emitter.AllocTempLocal(type);
CodeEmitterLocal expect = eic.Emitter.AllocTempLocal(type);
CodeEmitterLocal index = eic.Emitter.AllocTempLocal(Types.Int32);
CodeEmitterLocal obj = eic.Emitter.AllocTempLocal(tw.TypeAsLocalOrStackType);
eic.Emitter.Emit(OpCodes.Stloc, update);
eic.Emitter.Emit(OpCodes.Stloc, expect);
eic.Emitter.Emit(OpCodes.Conv_Ovf_I4);
eic.Emitter.Emit(OpCodes.Stloc, index);
eic.Emitter.Emit(OpCodes.Stloc, obj);
EmitConsumeUnsafe(eic);
eic.Emitter.Emit(OpCodes.Ldloc, obj);
eic.Emitter.Emit(OpCodes.Ldloc, index);
eic.Emitter.Emit(OpCodes.Ldelema, type);
eic.Emitter.Emit(OpCodes.Ldloc, update);
eic.Emitter.Emit(OpCodes.Ldloc, expect);
eic.Emitter.Emit(OpCodes.Call, AtomicReferenceFieldUpdaterEmitter.MakeCompareExchange(type));
eic.Emitter.Emit(OpCodes.Ldloc, expect);
eic.Emitter.Emit(OpCodes.Ceq);
eic.Emitter.ReleaseTempLocal(obj);
eic.Emitter.ReleaseTempLocal(index);
eic.Emitter.ReleaseTempLocal(expect);
eic.Emitter.ReleaseTempLocal(update);
eic.NonLeaf = false;
return(true);
}
if ((eic.Flags[eic.OpcodeIndex] & InstructionFlags.BranchTarget) != 0 ||
(eic.Flags[eic.OpcodeIndex - 1] & InstructionFlags.BranchTarget) != 0 ||
(eic.Flags[eic.OpcodeIndex - 2] & InstructionFlags.BranchTarget) != 0)
{
return(false);
}
if ((eic.Match(-1, NormalizedByteCode.__aload) || eic.Match(-1, NormalizedByteCode.__aconst_null)) &&
(eic.Match(-2, NormalizedByteCode.__aload) || eic.Match(-2, NormalizedByteCode.__aconst_null)) &&
eic.Match(-3, NormalizedByteCode.__getstatic))
{
FieldWrapper fw = GetUnsafeField(eic, eic.GetFieldref(-3));
if (fw != null &&
fw.IsAccessibleFrom(fw.DeclaringType, eic.Caller.DeclaringType, fw.DeclaringType) &&
eic.GetStackTypeWrapper(0, 0).IsAssignableTo(fw.FieldTypeWrapper) &&
eic.GetStackTypeWrapper(0, 1).IsAssignableTo(fw.FieldTypeWrapper) &&
(fw.IsStatic || fw.DeclaringType == eic.GetStackTypeWrapper(0, 3)))
{
Type type = fw.FieldTypeWrapper.TypeAsLocalOrStackType;
CodeEmitterLocal update = eic.Emitter.AllocTempLocal(type);
CodeEmitterLocal expect = eic.Emitter.AllocTempLocal(type);
eic.Emitter.Emit(OpCodes.Stloc, update);
eic.Emitter.Emit(OpCodes.Stloc, expect);
eic.Emitter.Emit(OpCodes.Pop); // discard index
if (fw.IsStatic)
{
eic.Emitter.Emit(OpCodes.Pop); // discard obj
EmitConsumeUnsafe(eic);
eic.Emitter.Emit(OpCodes.Ldsflda, fw.GetField());
}
else
{
CodeEmitterLocal obj = eic.Emitter.AllocTempLocal(eic.Caller.DeclaringType.TypeAsLocalOrStackType);
eic.Emitter.Emit(OpCodes.Stloc, obj);
EmitConsumeUnsafe(eic);
eic.Emitter.Emit(OpCodes.Ldloc, obj);
eic.Emitter.ReleaseTempLocal(obj);
eic.Emitter.Emit(OpCodes.Ldflda, fw.GetField());
}
eic.Emitter.Emit(OpCodes.Ldloc, update);
eic.Emitter.Emit(OpCodes.Ldloc, expect);
eic.Emitter.Emit(OpCodes.Call, AtomicReferenceFieldUpdaterEmitter.MakeCompareExchange(type));
eic.Emitter.Emit(OpCodes.Ldloc, expect);
eic.Emitter.Emit(OpCodes.Ceq);
eic.Emitter.ReleaseTempLocal(expect);
eic.Emitter.ReleaseTempLocal(update);
eic.NonLeaf = false;
return(true);
}
}
return(false);
}
private static bool AtomicReferenceFieldUpdater_newUpdater(EmitIntrinsicContext eic)
{
return(AtomicReferenceFieldUpdaterEmitter.Emit(eic.Context, eic.Caller.DeclaringType, eic.Emitter, eic.ClassFile, eic.OpcodeIndex, eic.Code, eic.Flags));
}
private static bool AtomicReferenceFieldUpdater_newUpdater(DynamicTypeWrapper.FinishContext context, CodeEmitter ilgen, MethodWrapper method, MethodAnalyzer ma, int opcodeIndex, MethodWrapper caller, ClassFile classFile, Instruction[] code, InstructionFlags[] flags)
{
return(AtomicReferenceFieldUpdaterEmitter.Emit(context, caller.DeclaringType, ilgen, classFile, opcodeIndex, code, flags));
}
