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221 lines
8.9 KiB
221 lines
8.9 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_MIRROR_OBJECT_ARRAY_H_
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#define ART_RUNTIME_MIRROR_OBJECT_ARRAY_H_
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#include <iterator>
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#include "array.h"
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#include "base/iteration_range.h"
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#include "obj_ptr.h"
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namespace art {
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namespace mirror {
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template<typename T, typename Container> class ArrayIter;
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template <typename T> using ConstObjPtrArrayIter = ArrayIter<T, const ObjPtr<ObjectArray<T>>>;
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template <typename T> using ConstHandleArrayIter = ArrayIter<T, const Handle<ObjectArray<T>>>;
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template <typename T> using ObjPtrArrayIter = ArrayIter<T, ObjPtr<ObjectArray<T>>>;
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template <typename T> using HandleArrayIter = ArrayIter<T, Handle<ObjectArray<T>>>;
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template<class T>
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class MANAGED ObjectArray: public Array {
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public:
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MIRROR_CLASS("[Ljava/lang/Object;");
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// The size of Object[].class.
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static uint32_t ClassSize(PointerSize pointer_size) {
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return Array::ClassSize(pointer_size);
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}
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static ObjPtr<ObjectArray<T>> Alloc(Thread* self,
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ObjPtr<Class> object_array_class,
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int32_t length,
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gc::AllocatorType allocator_type)
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REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
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static ObjPtr<ObjectArray<T>> Alloc(Thread* self,
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ObjPtr<Class> object_array_class,
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int32_t length)
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REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
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ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
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ALWAYS_INLINE ObjPtr<T> Get(int32_t i) REQUIRES_SHARED(Locks::mutator_lock_);
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// Returns true if the object can be stored into the array. If not, throws
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// an ArrayStoreException and returns false.
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// TODO fix thread safety analysis: should be REQUIRES_SHARED(Locks::mutator_lock_).
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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bool CheckAssignable(ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
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ALWAYS_INLINE void Set(int32_t i, ObjPtr<T> object) REQUIRES_SHARED(Locks::mutator_lock_);
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// TODO fix thread safety analysis: should be REQUIRES_SHARED(Locks::mutator_lock_).
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template<bool kTransactionActive, bool kCheckTransaction = true,
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VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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ALWAYS_INLINE void Set(int32_t i, ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
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// Set element without bound and element type checks, to be used in limited
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// circumstances, such as during boot image writing.
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// TODO fix thread safety analysis broken by the use of template. This should be
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// REQUIRES_SHARED(Locks::mutator_lock_).
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template<bool kTransactionActive, bool kCheckTransaction = true,
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VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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ALWAYS_INLINE void SetWithoutChecks(int32_t i, ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
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// TODO fix thread safety analysis broken by the use of template. This should be
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// REQUIRES_SHARED(Locks::mutator_lock_).
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template<bool kTransactionActive, bool kCheckTransaction = true,
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VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
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ALWAYS_INLINE void SetWithoutChecksAndWriteBarrier(int32_t i, ObjPtr<T> object)
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NO_THREAD_SAFETY_ANALYSIS;
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template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
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ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
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ALWAYS_INLINE ObjPtr<T> GetWithoutChecks(int32_t i) REQUIRES_SHARED(Locks::mutator_lock_);
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// Copy src into this array (dealing with overlaps as memmove does) without assignability checks.
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void AssignableMemmove(int32_t dst_pos,
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ObjPtr<ObjectArray<T>> src,
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int32_t src_pos,
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int32_t count)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Copy src into this array assuming no overlap and without assignability checks.
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void AssignableMemcpy(int32_t dst_pos,
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ObjPtr<ObjectArray<T>> src,
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int32_t src_pos,
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int32_t count)
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REQUIRES_SHARED(Locks::mutator_lock_);
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// Copy src into this array with assignability checks.
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template<bool kTransactionActive>
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void AssignableCheckingMemcpy(int32_t dst_pos,
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ObjPtr<ObjectArray<T>> src,
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int32_t src_pos,
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int32_t count,
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bool throw_exception)
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REQUIRES_SHARED(Locks::mutator_lock_);
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static ObjPtr<ObjectArray<T>> CopyOf(Handle<ObjectArray<T>> h_this,
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Thread* self,
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int32_t new_length)
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REQUIRES_SHARED(Locks::mutator_lock_)
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REQUIRES(!Roles::uninterruptible_);
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static MemberOffset OffsetOfElement(int32_t i);
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inline ConstObjPtrArrayIter<T> cbegin() const REQUIRES_SHARED(Locks::mutator_lock_);
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inline ConstObjPtrArrayIter<T> cend() const REQUIRES_SHARED(Locks::mutator_lock_);
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inline IterationRange<ConstObjPtrArrayIter<T>> ConstIterate() const REQUIRES_SHARED(Locks::mutator_lock_) {
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return IterationRange(cbegin(), cend());
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}
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inline ObjPtrArrayIter<T> begin() REQUIRES_SHARED(Locks::mutator_lock_);
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inline ObjPtrArrayIter<T> end() REQUIRES_SHARED(Locks::mutator_lock_);
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inline IterationRange<ObjPtrArrayIter<T>> Iterate() REQUIRES_SHARED(Locks::mutator_lock_) {
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return IterationRange(begin(), end());
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}
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static inline ConstHandleArrayIter<T> cbegin(const Handle<ObjectArray<T>>& h_this)
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REQUIRES_SHARED(Locks::mutator_lock_);
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static inline ConstHandleArrayIter<T> cend(const Handle<ObjectArray<T>>& h_this)
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REQUIRES_SHARED(Locks::mutator_lock_);
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static inline IterationRange<ConstHandleArrayIter<T>> ConstIterate(
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const Handle<ObjectArray<T>>& h_this) REQUIRES_SHARED(Locks::mutator_lock_) {
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return IterationRange(cbegin(h_this), cend(h_this));
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}
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static inline HandleArrayIter<T> begin(Handle<ObjectArray<T>>& h_this)
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REQUIRES_SHARED(Locks::mutator_lock_);
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static inline HandleArrayIter<T> end(Handle<ObjectArray<T>>& h_this)
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REQUIRES_SHARED(Locks::mutator_lock_);
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static inline IterationRange<HandleArrayIter<T>> Iterate(Handle<ObjectArray<T>>& h_this)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return IterationRange(begin(h_this), end(h_this));
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}
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private:
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// TODO fix thread safety analysis broken by the use of template. This should be
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// REQUIRES_SHARED(Locks::mutator_lock_).
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template<typename Visitor>
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void VisitReferences(const Visitor& visitor) NO_THREAD_SAFETY_ANALYSIS;
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friend class Object; // For VisitReferences
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DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectArray);
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};
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// Everything is NO_THREAD_SAFETY_ANALYSIS to work-around STL incompat with thread-annotations.
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// Everything should have REQUIRES_SHARED(Locks::mutator_lock_).
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template <typename T, typename Container>
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class ArrayIter : public std::iterator<std::forward_iterator_tag, ObjPtr<T>> {
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private:
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using Iter = ArrayIter<T, Container>;
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public:
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ArrayIter(Container array, int32_t idx) NO_THREAD_SAFETY_ANALYSIS : array_(array), idx_(idx) {
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CheckIdx();
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}
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ArrayIter(const Iter& other) = default; // NOLINT(runtime/explicit)
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Iter& operator=(const Iter& other) = default;
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bool operator!=(const Iter& other) const NO_THREAD_SAFETY_ANALYSIS {
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CheckIdx();
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return !(*this == other);
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}
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bool operator==(const Iter& other) const NO_THREAD_SAFETY_ANALYSIS {
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return Ptr(other.array_) == Ptr(array_) && other.idx_ == idx_;
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}
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Iter& operator++() NO_THREAD_SAFETY_ANALYSIS {
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idx_++;
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CheckIdx();
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return *this;
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}
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Iter operator++(int) NO_THREAD_SAFETY_ANALYSIS {
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Iter res(this);
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idx_++;
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CheckIdx();
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return res;
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}
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ObjPtr<T> operator->() const NO_THREAD_SAFETY_ANALYSIS {
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CheckIdx();
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return array_->GetWithoutChecks(idx_);
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}
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ObjPtr<T> operator*() const NO_THREAD_SAFETY_ANALYSIS {
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CheckIdx();
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return array_->GetWithoutChecks(idx_);
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}
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private:
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// Checks current index and that locks are properly held.
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void CheckIdx() const REQUIRES_SHARED(Locks::mutator_lock_);
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static ObjectArray<T>* Ptr(const Handle<ObjectArray<T>>& p)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return p.Get();
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}
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static ObjectArray<T>* Ptr(const ObjPtr<ObjectArray<T>>& p)
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REQUIRES_SHARED(Locks::mutator_lock_) {
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return p.Ptr();
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}
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Container array_;
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int32_t idx_;
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};
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} // namespace mirror
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} // namespace art
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#endif // ART_RUNTIME_MIRROR_OBJECT_ARRAY_H_
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