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/*
* Copyright (C) 2014 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_COMPILER_UTILS_ARENA_CONTAINERS_H_
#define ART_COMPILER_UTILS_ARENA_CONTAINERS_H_
#include <deque>
#include <queue>
#include <set>
#include <vector>
#include "utils/arena_allocator.h"
#include "safe_map.h"
namespace art {
// Adapter for use of ArenaAllocator in STL containers.
// Use ArenaAllocator::Adapter() to create an adapter to pass to container constructors.
// For example,
// struct Foo {
// explicit Foo(ArenaAllocator* allocator)
// : foo_vector(allocator->Adapter(kArenaAllocMisc)),
// foo_map(std::less<int>(), allocator->Adapter()) {
// }
// ArenaVector<int> foo_vector;
// ArenaSafeMap<int, int> foo_map;
// };
template <typename T>
class ArenaAllocatorAdapter;
template <typename T>
using ArenaDeque = std::deque<T, ArenaAllocatorAdapter<T>>;
template <typename T>
using ArenaQueue = std::queue<T, ArenaDeque<T>>;
template <typename T>
using ArenaVector = std::vector<T, ArenaAllocatorAdapter<T>>;
template <typename T, typename Comparator = std::less<T>>
using ArenaSet = std::set<T, Comparator, ArenaAllocatorAdapter<T>>;
template <typename K, typename V, typename Comparator = std::less<K>>
using ArenaSafeMap =
SafeMap<K, V, Comparator, ArenaAllocatorAdapter<std::pair<const K, V>>>;
// Implementation details below.
template <bool kCount>
class ArenaAllocatorAdapterKindImpl;
template <>
class ArenaAllocatorAdapterKindImpl<false> {
public:
// Not tracking allocations, ignore the supplied kind and arbitrarily provide kArenaAllocSTL.
explicit ArenaAllocatorAdapterKindImpl(ArenaAllocKind kind) { }
ArenaAllocatorAdapterKindImpl& operator=(const ArenaAllocatorAdapterKindImpl& other) = default;
ArenaAllocKind Kind() { return kArenaAllocSTL; }
};
template <bool kCount>
class ArenaAllocatorAdapterKindImpl {
public:
explicit ArenaAllocatorAdapterKindImpl(ArenaAllocKind kind) : kind_(kind) { }
ArenaAllocatorAdapterKindImpl& operator=(const ArenaAllocatorAdapterKindImpl& other) = default;
ArenaAllocKind Kind() { return kind_; }
private:
ArenaAllocKind kind_;
};
typedef ArenaAllocatorAdapterKindImpl<kArenaAllocatorCountAllocations> ArenaAllocatorAdapterKind;
template <>
class ArenaAllocatorAdapter<void>
: private DebugStackReference, private ArenaAllocatorAdapterKind {
public:
typedef void value_type;
typedef void* pointer;
typedef const void* const_pointer;
template <typename U>
struct rebind {
typedef ArenaAllocatorAdapter<U> other;
};
explicit ArenaAllocatorAdapter(ArenaAllocator* arena_allocator,
ArenaAllocKind kind = kArenaAllocSTL)
: DebugStackReference(arena_allocator),
ArenaAllocatorAdapterKind(kind),
arena_allocator_(arena_allocator) {
}
template <typename U>
ArenaAllocatorAdapter(const ArenaAllocatorAdapter<U>& other)
: DebugStackReference(other),
ArenaAllocatorAdapterKind(other),
arena_allocator_(other.arena_allocator_) {
}
ArenaAllocatorAdapter(const ArenaAllocatorAdapter& other) = default;
ArenaAllocatorAdapter& operator=(const ArenaAllocatorAdapter& other) = default;
~ArenaAllocatorAdapter() = default;
private:
ArenaAllocator* arena_allocator_;
template <typename U>
friend class ArenaAllocatorAdapter;
};
template <typename T>
class ArenaAllocatorAdapter : private DebugStackReference, private ArenaAllocatorAdapterKind {
public:
typedef T value_type;
typedef T* pointer;
typedef T& reference;
typedef const T* const_pointer;
typedef const T& const_reference;
typedef size_t size_type;
typedef ptrdiff_t difference_type;
template <typename U>
struct rebind {
typedef ArenaAllocatorAdapter<U> other;
};
explicit ArenaAllocatorAdapter(ArenaAllocator* arena_allocator, ArenaAllocKind kind)
: DebugStackReference(arena_allocator),
ArenaAllocatorAdapterKind(kind),
arena_allocator_(arena_allocator) {
}
template <typename U>
ArenaAllocatorAdapter(const ArenaAllocatorAdapter<U>& other)
: DebugStackReference(other),
ArenaAllocatorAdapterKind(other),
arena_allocator_(other.arena_allocator_) {
}
ArenaAllocatorAdapter(const ArenaAllocatorAdapter& other) = default;
ArenaAllocatorAdapter& operator=(const ArenaAllocatorAdapter& other) = default;
~ArenaAllocatorAdapter() = default;
size_type max_size() const {
return static_cast<size_type>(-1) / sizeof(T);
}
pointer address(reference x) const { return &x; }
const_pointer address(const_reference x) const { return &x; }
pointer allocate(size_type n, ArenaAllocatorAdapter<void>::pointer hint = nullptr) {
DCHECK_LE(n, max_size());
return reinterpret_cast<T*>(arena_allocator_->Alloc(n * sizeof(T),
ArenaAllocatorAdapterKind::Kind()));
}
void deallocate(pointer p, size_type n) {
}
void construct(pointer p, const_reference val) {
new (static_cast<void*>(p)) value_type(val);
}
void destroy(pointer p) {
p->~value_type();
}
private:
ArenaAllocator* arena_allocator_;
template <typename U>
friend class ArenaAllocatorAdapter;
template <typename U>
friend bool operator==(const ArenaAllocatorAdapter<U>& lhs,
const ArenaAllocatorAdapter<U>& rhs);
};
template <typename T>
inline bool operator==(const ArenaAllocatorAdapter<T>& lhs,
const ArenaAllocatorAdapter<T>& rhs) {
return lhs.arena_allocator_ == rhs.arena_allocator_;
}
template <typename T>
inline bool operator!=(const ArenaAllocatorAdapter<T>& lhs,
const ArenaAllocatorAdapter<T>& rhs) {
return !(lhs == rhs);
}
inline ArenaAllocatorAdapter<void> ArenaAllocator::Adapter(ArenaAllocKind kind) {
return ArenaAllocatorAdapter<void>(this, kind);
}
} // namespace art
#endif // ART_COMPILER_UTILS_ARENA_CONTAINERS_H_
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