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Commit	Line	Data
	1	/*
	2	* Copyright (C) 2012 Apple Inc. All rights reserved.
	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
	14	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	15	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	16	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
	17	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	18	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	19	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	20	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	21	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	23	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
	26	#ifndef MethodCallLinkStatus_h
	27	#define MethodCallLinkStatus_h
	28
	29	namespace JSC {
	30
	31	class CodeBlock;
	32	class JSObject;
	33	class Structure;
	34
	35	class MethodCallLinkStatus {
	36	public:
	37	MethodCallLinkStatus()
	38	: m_structure(0)
	39	, m_prototypeStructure(0)
	40	, m_function(0)
	41	, m_prototype(0)
	42	{
	43	}
	44
	45	MethodCallLinkStatus(
	46	Structure* structure,
	47	Structure* prototypeStructure,
	48	JSObject* function,
	49	JSObject* prototype)
	50	: m_structure(structure)
	51	, m_prototypeStructure(prototypeStructure)
	52	, m_function(function)
	53	, m_prototype(prototype)
	54	{
	55	if (!m_function) {
	56	ASSERT(!m_structure);
	57	ASSERT(!m_prototypeStructure);
	58	ASSERT(!m_prototype);
	59	} else
	60	ASSERT(m_structure);
	61
	62	ASSERT(!m_prototype == !m_prototypeStructure);
	63	}
	64
	65	static MethodCallLinkStatus computeFor(CodeBlock*, unsigned bytecodeIndex);
	66
	67	bool isSet() const { return !!m_function; }
	68	bool operator!() const { return !m_function; }
	69
	70	bool needsPrototypeCheck() const { return !!m_prototype; }
	71
	72	Structure* structure() { return m_structure; }
	73	Structure* prototypeStructure() { return m_prototypeStructure; }
	74	JSObject* function() const { return m_function; }
	75	JSObject* prototype() const { return m_prototype; }
	76
	77	private:
	78	Structure* m_structure;
	79	Structure* m_prototypeStructure;
	80	JSObject* m_function;
	81	JSObject* m_prototype;
	82	};
	83
	84	} // namespace JSC
	85
	86	#endif // MethodCallLinkStatus_h
	87