Mercurial > hg > graal-compiler
diff src/share/vm/ci/ciNullObject.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/ci/ciNullObject.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,49 @@ +/* + * Copyright 1999-2000 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// ciNullObject +// +// This class represents a null reference in the VM. +class ciNullObject : public ciObject { + CI_PACKAGE_ACCESS + +private: + ciNullObject() : ciObject() {} + + const char* type_string() { return "ciNullObject"; } + + void print_impl(outputStream* st); + +public: + // Is this ciObject a Java Language Object? That is, + // is the ciObject an instance or an array + bool is_java_object() { return true; } + + // What kind of ciObject is this? + bool is_null_object() const { return true; } + bool is_classless() const { return true; } + + // Get the distinguished instance of this klass. + static ciNullObject* make(); +};