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8282191: Implementation of Foreign Function & Memory API (Preview)

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Reviewed-by: erikj, jvernee, psandoz, dholmes, mchung
This commit is contained in:
Maurizio Cimadamore 2022-05-12 16:17:45 +00:00
parent 3be394e160
commit 2c5d136260
303 changed files with 33474 additions and 9186 deletions
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59
src/java.base/share/classes/java/lang/invoke/VarHandleSegmentViewBase.java Normal file
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/*
* Copyright (c) 2019, 2022, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.lang.invoke;
/**
* Base class for memory segment var handle view implementations.
*/
abstract sealed class VarHandleSegmentViewBase extends VarHandle permits
VarHandleSegmentAsBytes,
VarHandleSegmentAsChars,
VarHandleSegmentAsDoubles,
VarHandleSegmentAsFloats,
VarHandleSegmentAsInts,
VarHandleSegmentAsLongs,
VarHandleSegmentAsShorts {
/** endianness **/
final boolean be;
/** access size (in bytes, computed from var handle carrier type) **/
final long length;
/** alignment constraint (in bytes, expressed as a bit mask) **/
final long alignmentMask;
VarHandleSegmentViewBase(VarForm form, boolean be, long length, long alignmentMask, boolean exact) {
super(form, exact);
this.be = be;
this.length = length;
this.alignmentMask = alignmentMask;
}
static IllegalArgumentException newIllegalArgumentExceptionForMisalignedAccess(long address) {
return new IllegalArgumentException("Misaligned access at address: " + address);
}
}