forked from openjdk/panama-foreign
/
AbstractCLinker.java
62 lines (57 loc) · 2.69 KB
/
AbstractCLinker.java
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/*
* Copyright (c) 2021, 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 jdk.internal.foreign;
import jdk.incubator.foreign.Addressable;
import jdk.incubator.foreign.CLinker;
import jdk.incubator.foreign.FunctionDescriptor;
import jdk.incubator.foreign.MemorySegment;
import jdk.incubator.foreign.SegmentAllocator;
import jdk.internal.foreign.abi.SharedUtils;
import jdk.internal.reflect.CallerSensitive;
import jdk.internal.reflect.Reflection;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.util.Objects;
public abstract class AbstractCLinker implements CLinker {
@CallerSensitive
public final MethodHandle downcallHandle(Addressable symbol, MethodType type, FunctionDescriptor function) {
Reflection.ensureNativeAccess(Reflection.getCallerClass());
SharedUtils.checkSymbol(symbol);
return MethodHandles.insertArguments(downcallHandle(type, function), 0, symbol);
}
@CallerSensitive
public final MethodHandle downcallHandle(Addressable symbol, SegmentAllocator allocator, MethodType type, FunctionDescriptor function) {
Reflection.ensureNativeAccess(Reflection.getCallerClass());
SharedUtils.checkSymbol(symbol);
Objects.requireNonNull(allocator);
MethodHandle downcall = MethodHandles.insertArguments(downcallHandle(type, function), 0, symbol);
if (type.returnType().equals(MemorySegment.class)) {
downcall = MethodHandles.insertArguments(downcall, 0, allocator);
}
return downcall;
}
}