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/*
* Copyright (c) 2020, 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.
*
* 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.
*
*/
import java.lang.foreign.*;
import java.lang.foreign.Arena;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public abstract class TestUpcallBase extends CallGeneratorHelper {
static FunctionDescriptor function(Ret ret, List<ParamType> params, List<StructFieldType> fields) {
return function(ret, params, fields, List.of());
}
static FunctionDescriptor function(Ret ret, List<ParamType> params, List<StructFieldType> fields, List<MemoryLayout> prefix) {
List<MemoryLayout> paramLayouts = params.stream().map(p -> p.layout(fields)).collect(Collectors.toList());
paramLayouts.add(C_POINTER); // the callback
MemoryLayout[] layouts = Stream.concat(prefix.stream(), paramLayouts.stream()).toArray(MemoryLayout[]::new);
return ret == Ret.VOID ?
FunctionDescriptor.ofVoid(layouts) :
FunctionDescriptor.of(layouts[prefix.size()], layouts);
}
static Object[] makeArgs(AtomicReference<Object[]> capturedArgs, Arena arena, FunctionDescriptor downcallDescriptor,
List<Consumer<Object>> checks, List<Consumer<Object>> argChecks, int numPrefixArgs) {
MemoryLayout[] upcallArgLayouts = downcallDescriptor.argumentLayouts()
.subList(0, downcallDescriptor.argumentLayouts().size() - 1) // drop CB layout
.toArray(MemoryLayout[]::new);
TestValue[] args = new TestValue[upcallArgLayouts.length];
for (int i = 0; i < args.length; i++) {
MemoryLayout layout = upcallArgLayouts[i];
TestValue testValue = genTestValue(layout, arena);
args[i] = testValue;
if (i >= numPrefixArgs) {
argChecks.add(testValue.check());
}
}
int returnedArgIdx;
FunctionDescriptor upcallDescriptor;
if (downcallDescriptor.returnLayout().isPresent()) {
returnedArgIdx = numPrefixArgs;
upcallDescriptor = FunctionDescriptor.of(downcallDescriptor.returnLayout().get(), upcallArgLayouts);
checks.add(args[returnedArgIdx].check());
} else {
returnedArgIdx = -1;
upcallDescriptor = FunctionDescriptor.ofVoid(upcallArgLayouts);
}
MemorySegment callback = makeArgSaverCB(upcallDescriptor, arena, capturedArgs, returnedArgIdx);
return Stream.concat(Stream.of(args).map(TestValue::value), Stream.of(callback)).toArray();
}
}
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