/*
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* Copyright (c) 2003, 2005, Oracle and/or its affiliates. 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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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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/* FrameID: */
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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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#define FNUM_BWIDTH 16
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#define FNUM_BMASK ((1<<FNUM_BWIDTH)-1)
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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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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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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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jdwpError
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validateFrameID(jthread thread, FrameID frame)
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{
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jlong frameGeneration;
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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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