michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0:  * vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef jit_Recover_h
michael@0: #define jit_Recover_h
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: #include "jit/Snapshots.h"
michael@0: 
michael@0: namespace js {
michael@0: namespace jit {
michael@0: 
michael@0: class RResumePoint;
michael@0: 
michael@0: class RInstruction
michael@0: {
michael@0:   public:
michael@0:     enum Opcode
michael@0:     {
michael@0:         Recover_ResumePoint = 0
michael@0:     };
michael@0: 
michael@0:     virtual Opcode opcode() const = 0;
michael@0: 
michael@0:     bool isResumePoint() const {
michael@0:         return opcode() == Recover_ResumePoint;
michael@0:     }
michael@0:     inline const RResumePoint *toResumePoint() const;
michael@0: 
michael@0:     virtual uint32_t numOperands() const = 0;
michael@0: 
michael@0:     static void readRecoverData(CompactBufferReader &reader, RInstructionStorage *raw);
michael@0: };
michael@0: 
michael@0: class RResumePoint MOZ_FINAL : public RInstruction
michael@0: {
michael@0:   private:
michael@0:     uint32_t pcOffset_;           // Offset from script->code.
michael@0:     uint32_t numOperands_;        // Number of slots.
michael@0: 
michael@0:     friend class RInstruction;
michael@0:     RResumePoint(CompactBufferReader &reader);
michael@0: 
michael@0:   public:
michael@0:     virtual Opcode opcode() const {
michael@0:         return Recover_ResumePoint;
michael@0:     }
michael@0: 
michael@0:     uint32_t pcOffset() const {
michael@0:         return pcOffset_;
michael@0:     }
michael@0:     virtual uint32_t numOperands() const {
michael@0:         return numOperands_;
michael@0:     }
michael@0: };
michael@0: 
michael@0: const RResumePoint *
michael@0: RInstruction::toResumePoint() const
michael@0: {
michael@0:     MOZ_ASSERT(isResumePoint());
michael@0:     return static_cast<const RResumePoint *>(this);
michael@0: }
michael@0: 
michael@0: }
michael@0: }
michael@0: 
michael@0: #endif /* jit_Recover_h */