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/*
* Copyright (C) 2011 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_OBJECT_ARRAY_H_
#define ART_RUNTIME_MIRROR_OBJECT_ARRAY_H_
#include <iterator>
#include "array.h"
#include "base/iteration_range.h"
#include "obj_ptr.h"
namespace art {
namespace mirror {
template<typename T, typename Container> class ArrayIter;
template <typename T> using ConstObjPtrArrayIter = ArrayIter<T, const ObjPtr<ObjectArray<T>>>;
template <typename T> using ConstHandleArrayIter = ArrayIter<T, const Handle<ObjectArray<T>>>;
template <typename T> using ObjPtrArrayIter = ArrayIter<T, ObjPtr<ObjectArray<T>>>;
template <typename T> using HandleArrayIter = ArrayIter<T, Handle<ObjectArray<T>>>;
template<class T>
class MANAGED ObjectArray: public Array {
public:
// The size of Object[].class.
static uint32_t ClassSize(PointerSize pointer_size) {
return Array::ClassSize(pointer_size);
}
static ObjPtr<ObjectArray<T>> Alloc(Thread* self,
ObjPtr<Class> object_array_class,
int32_t length,
gc::AllocatorType allocator_type)
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
static ObjPtr<ObjectArray<T>> Alloc(Thread* self,
ObjPtr<Class> object_array_class,
int32_t length)
REQUIRES_SHARED(Locks::mutator_lock_) REQUIRES(!Roles::uninterruptible_);
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE ObjPtr<T> Get(int32_t i) REQUIRES_SHARED(Locks::mutator_lock_);
// Returns true if the object can be stored into the array. If not, throws
// an ArrayStoreException and returns false.
// TODO fix thread safety analysis: should be REQUIRES_SHARED(Locks::mutator_lock_).
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
bool CheckAssignable(ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
ALWAYS_INLINE void Set(int32_t i, ObjPtr<T> object) REQUIRES_SHARED(Locks::mutator_lock_);
// TODO fix thread safety analysis: should be REQUIRES_SHARED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void Set(int32_t i, ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
// Set element without bound and element type checks, to be used in limited
// circumstances, such as during boot image writing.
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetWithoutChecks(int32_t i, ObjPtr<T> object) NO_THREAD_SAFETY_ANALYSIS;
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template<bool kTransactionActive, bool kCheckTransaction = true,
VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags>
ALWAYS_INLINE void SetWithoutChecksAndWriteBarrier(int32_t i, ObjPtr<T> object)
NO_THREAD_SAFETY_ANALYSIS;
template<VerifyObjectFlags kVerifyFlags = kDefaultVerifyFlags,
ReadBarrierOption kReadBarrierOption = kWithReadBarrier>
ALWAYS_INLINE ObjPtr<T> GetWithoutChecks(int32_t i) REQUIRES_SHARED(Locks::mutator_lock_);
// Copy src into this array (dealing with overlaps as memmove does) without assignability checks.
void AssignableMemmove(int32_t dst_pos,
ObjPtr<ObjectArray<T>> src,
int32_t src_pos,
int32_t count)
REQUIRES_SHARED(Locks::mutator_lock_);
// Copy src into this array assuming no overlap and without assignability checks.
void AssignableMemcpy(int32_t dst_pos,
ObjPtr<ObjectArray<T>> src,
int32_t src_pos,
int32_t count)
REQUIRES_SHARED(Locks::mutator_lock_);
// Copy src into this array with assignability checks.
template<bool kTransactionActive>
void AssignableCheckingMemcpy(int32_t dst_pos,
ObjPtr<ObjectArray<T>> src,
int32_t src_pos,
int32_t count,
bool throw_exception)
REQUIRES_SHARED(Locks::mutator_lock_);
static ObjPtr<ObjectArray<T>> CopyOf(Handle<ObjectArray<T>> h_this,
Thread* self,
int32_t new_length)
REQUIRES_SHARED(Locks::mutator_lock_)
REQUIRES(!Roles::uninterruptible_);
static MemberOffset OffsetOfElement(int32_t i);
inline ConstObjPtrArrayIter<T> cbegin() const REQUIRES_SHARED(Locks::mutator_lock_);
inline ConstObjPtrArrayIter<T> cend() const REQUIRES_SHARED(Locks::mutator_lock_);
inline IterationRange<ConstObjPtrArrayIter<T>> ConstIterate() const REQUIRES_SHARED(Locks::mutator_lock_) {
return IterationRange(cbegin(), cend());
}
inline ObjPtrArrayIter<T> begin() REQUIRES_SHARED(Locks::mutator_lock_);
inline ObjPtrArrayIter<T> end() REQUIRES_SHARED(Locks::mutator_lock_);
inline IterationRange<ObjPtrArrayIter<T>> Iterate() REQUIRES_SHARED(Locks::mutator_lock_) {
return IterationRange(begin(), end());
}
static inline ConstHandleArrayIter<T> cbegin(const Handle<ObjectArray<T>>& h_this)
REQUIRES_SHARED(Locks::mutator_lock_);
static inline ConstHandleArrayIter<T> cend(const Handle<ObjectArray<T>>& h_this)
REQUIRES_SHARED(Locks::mutator_lock_);
static inline IterationRange<ConstHandleArrayIter<T>> ConstIterate(
const Handle<ObjectArray<T>>& h_this) REQUIRES_SHARED(Locks::mutator_lock_) {
return IterationRange(cbegin(h_this), cend(h_this));
}
static inline HandleArrayIter<T> begin(Handle<ObjectArray<T>>& h_this)
REQUIRES_SHARED(Locks::mutator_lock_);
static inline HandleArrayIter<T> end(Handle<ObjectArray<T>>& h_this)
REQUIRES_SHARED(Locks::mutator_lock_);
static inline IterationRange<HandleArrayIter<T>> Iterate(Handle<ObjectArray<T>>& h_this)
REQUIRES_SHARED(Locks::mutator_lock_) {
return IterationRange(begin(h_this), end(h_this));
}
private:
// TODO fix thread safety analysis broken by the use of template. This should be
// REQUIRES_SHARED(Locks::mutator_lock_).
template<typename Visitor>
void VisitReferences(const Visitor& visitor) NO_THREAD_SAFETY_ANALYSIS;
friend class Object; // For VisitReferences
DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectArray);
};
// Everything is NO_THREAD_SAFETY_ANALYSIS to work-around STL incompat with thread-annotations.
// Everything should have REQUIRES_SHARED(Locks::mutator_lock_).
template <typename T, typename Container>
class ArrayIter : public std::iterator<std::forward_iterator_tag, ObjPtr<T>> {
private:
using Iter = ArrayIter<T, Container>;
public:
ArrayIter(Container array, int32_t idx) NO_THREAD_SAFETY_ANALYSIS : array_(array), idx_(idx) {
CheckIdx();
}
ArrayIter(const Iter& other) = default; // NOLINT(runtime/explicit)
Iter& operator=(const Iter& other) = default;
bool operator!=(const Iter& other) const NO_THREAD_SAFETY_ANALYSIS {
CheckIdx();
return !(*this == other);
}
bool operator==(const Iter& other) const NO_THREAD_SAFETY_ANALYSIS {
return Ptr(other.array_) == Ptr(array_) && other.idx_ == idx_;
}
Iter& operator++() NO_THREAD_SAFETY_ANALYSIS {
idx_++;
CheckIdx();
return *this;
}
Iter operator++(int) NO_THREAD_SAFETY_ANALYSIS {
Iter res(this);
idx_++;
CheckIdx();
return res;
}
ObjPtr<T> operator->() const NO_THREAD_SAFETY_ANALYSIS {
CheckIdx();
return array_->GetWithoutChecks(idx_);
}
ObjPtr<T> operator*() const NO_THREAD_SAFETY_ANALYSIS {
CheckIdx();
return array_->GetWithoutChecks(idx_);
}
private:
// Checks current index and that locks are properly held.
void CheckIdx() const REQUIRES_SHARED(Locks::mutator_lock_);
static ObjectArray<T>* Ptr(const Handle<ObjectArray<T>>& p)
REQUIRES_SHARED(Locks::mutator_lock_) {
return p.Get();
}
static ObjectArray<T>* Ptr(const ObjPtr<ObjectArray<T>>& p)
REQUIRES_SHARED(Locks::mutator_lock_) {
return p.Ptr();
}
Container array_;
int32_t idx_;
};
} // namespace mirror
} // namespace art
#endif // ART_RUNTIME_MIRROR_OBJECT_ARRAY_H_
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