diff options
Diffstat (limited to 'libs/hwui/utils/FatVector.h')
-rw-r--r-- | libs/hwui/utils/FatVector.h | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/libs/hwui/utils/FatVector.h b/libs/hwui/utils/FatVector.h deleted file mode 100644 index 49f1984b779f..000000000000 --- a/libs/hwui/utils/FatVector.h +++ /dev/null @@ -1,96 +0,0 @@ -/* - * Copyright 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 ANDROID_FAT_VECTOR_H -#define ANDROID_FAT_VECTOR_H - -#include "utils/Macros.h" - -#include <stddef.h> -#include <stdlib.h> -#include <utils/Log.h> -#include <type_traits> - -#include <vector> - -namespace android { -namespace uirenderer { - -template <typename T, size_t SIZE> -class InlineStdAllocator { -public: - struct Allocation { - PREVENT_COPY_AND_ASSIGN(Allocation); - - public: - Allocation(){}; - // char array instead of T array, so memory is uninitialized, with no destructors run - char array[sizeof(T) * SIZE]; - bool inUse = false; - }; - - typedef T value_type; // needed to implement std::allocator - typedef T* pointer; // needed to implement std::allocator - - explicit InlineStdAllocator(Allocation& allocation) : mAllocation(allocation) {} - InlineStdAllocator(const InlineStdAllocator& other) : mAllocation(other.mAllocation) {} - ~InlineStdAllocator() {} - - T* allocate(size_t num, const void* = 0) { - if (!mAllocation.inUse && num <= SIZE) { - mAllocation.inUse = true; - return (T*)mAllocation.array; - } else { - return (T*)malloc(num * sizeof(T)); - } - } - - void deallocate(pointer p, size_t num) { - if (p == (T*)mAllocation.array) { - mAllocation.inUse = false; - } else { - // 'free' instead of delete here - destruction handled separately - free(p); - } - } - Allocation& mAllocation; -}; - -/** - * std::vector with SIZE elements preallocated into an internal buffer. - * - * Useful for avoiding the cost of malloc in cases where only SIZE or - * fewer elements are needed in the common case. - */ -template <typename T, size_t SIZE> -class FatVector : public std::vector<T, InlineStdAllocator<T, SIZE>> { -public: - FatVector() - : std::vector<T, InlineStdAllocator<T, SIZE>>( - InlineStdAllocator<T, SIZE>(mAllocation)) { - this->reserve(SIZE); - } - - explicit FatVector(size_t capacity) : FatVector() { this->resize(capacity); } - -private: - typename InlineStdAllocator<T, SIZE>::Allocation mAllocation; -}; - -} // namespace uirenderer -} // namespace android - -#endif // ANDROID_FAT_VECTOR_H |