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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_RUNTIME_MIRROR_LAMBDA_PROXY_H_
#define ART_RUNTIME_MIRROR_LAMBDA_PROXY_H_
#include "lambda/closure.h"
#include "object.h"
namespace art {
struct LambdaProxyOffsets;
namespace mirror {
// C++ mirror of a lambda proxy. Does not yet have a Java-equivalent source file.
class MANAGED LambdaProxy FINAL : public Object {
public:
// Note that the runtime subclasses generate the following static fields:
// private static java.lang.Class[] interfaces; // Declared interfaces for the lambda interface.
static constexpr size_t kStaticFieldIndexInterfaces = 0;
// private static java.lang.Class[][] throws; // Maps vtable id to list of classes.
static constexpr size_t kStaticFieldIndexThrows = 1;
static constexpr size_t kStaticFieldCount = 2; // Number of fields total.
// The offset from the start of 'LambdaProxy' object, to the closure_ field, in bytes.
// -- This is exposed publically in order to avoid exposing 'closure_' publically.
// -- Only meant to be used in stubs and other compiled code, not in runtime.
static inline MemberOffset GetInstanceFieldOffsetClosure() {
return OFFSET_OF_OBJECT_MEMBER(LambdaProxy, closure_);
}
// Direct methods available on the class:
static constexpr size_t kDirectMethodIndexConstructor = 0; // <init>()V
static constexpr size_t kDirectMethodCount = 1; // Only the constructor.
// Accessors to the fields:
// Get the native closure pointer. Usually non-null outside of lambda proxy contexts.
lambda::Closure* GetClosure() SHARED_REQUIRES(Locks::mutator_lock_) {
return reinterpret_cast<lambda::Closure*>(
GetField64(GetInstanceFieldOffsetClosure()));
}
// Set the native closure pointer. Usually should be non-null outside of lambda proxy contexts.
void SetClosure(lambda::Closure* closure) SHARED_REQUIRES(Locks::mutator_lock_) {
SetField64<false>(GetInstanceFieldOffsetClosure(),
reinterpret_cast<uint64_t>(closure));
}
private:
// Instance fields, present in the base class and every generated subclass:
// private long closure;
union {
lambda::Closure* actual;
uint64_t padding; // Don't trip up GetObjectSize checks, since the Java code has a long.
} closure_;
// Friends for generating offset tests:
friend struct art::LambdaProxyOffsets; // for verifying offset information
DISALLOW_IMPLICIT_CONSTRUCTORS(LambdaProxy);
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_LAMBDA_PROXY_H_
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