/*+
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 * Copyright 2003-2005 Sun Microsystems, Inc.  All Rights Reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.  Sun designates this+
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 * particular file as subject to the "Classpath" exception as provided+
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 * by Sun in the LICENSE file that accompanied this code.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,+
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 * CA 95054 USA or visit www.sun.com if you need additional information or+
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 * have any questions.+
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 */+
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+
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#include "util.h"+
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#include "FrameID.h"+
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#include "threadControl.h"+
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+
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/* FrameID: */+
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+
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/* ------------------------------------------------------------ */+
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/* | thread frame generation (48 bits)| frame number (16 bits)| */+
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/* ------------------------------------------------------------ */+
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+
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#define FNUM_BWIDTH 16+
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#define FNUM_BMASK ((1<<FNUM_BWIDTH)-1)+
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+
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FrameID+
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createFrameID(jthread thread, FrameNumber fnum)+
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{+
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    FrameID frame;+
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    jlong frameGeneration;+
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+
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    frameGeneration = threadControl_getFrameGeneration(thread);+
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    frame = (frameGeneration<<FNUM_BWIDTH) | (jlong)fnum;+
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    return frame;+
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}+
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+
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FrameNumber+
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getFrameNumber(FrameID frame)+
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{+
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    /*LINTED*/+
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    return (FrameNumber)(((jint)frame) & FNUM_BMASK);+
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}+
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+
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jdwpError+
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validateFrameID(jthread thread, FrameID frame)+
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{+
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    jlong frameGeneration;+
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+
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    frameGeneration = threadControl_getFrameGeneration(thread);+
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    if ( frameGeneration != (frame>>FNUM_BWIDTH)  ) {+
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        return JDWP_ERROR(INVALID_FRAMEID);+
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    }+
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    return JDWP_ERROR(NONE);+
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}+
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