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 DFGOSRExitJumpPlaceholder_h 27#define DFGOSRExitJumpPlaceholder_h 28 29#if ENABLE(DFG_JIT) 30 31#include "DFGCommon.h" 32#include "MacroAssembler.h" 33 34namespace JSC { namespace DFG { 35 36class JITCompiler; 37class SpeculativeJIT; 38 39class OSRExitJumpPlaceholder { 40public: 41 OSRExitJumpPlaceholder() 42 : m_index(std::numeric_limits<unsigned>::max()) 43 { 44 } 45 46private: 47 friend class SpeculativeJIT; 48 49 OSRExitJumpPlaceholder(unsigned index) 50 : m_index(index) 51 { 52 } 53 54public: 55 bool operator!() const { return m_index == std::numeric_limits<unsigned>::max(); } 56 57 void fill(JITCompiler&, const MacroAssembler::JumpList&); 58 void fill(SpeculativeJIT*, const MacroAssembler::JumpList&); 59 60private: 61 unsigned m_index; 62}; 63 64} } // namespace JSC::DFG 65 66#endif // ENABLE(DFG_JIT) 67 68#endif // DFGOSRExitJumpPlaceholder_h 69 70