| /* |
| * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_MEMORY_PADDED_INLINE_HPP |
| #define SHARE_VM_MEMORY_PADDED_INLINE_HPP |
| |
| #include "memory/allocation.inline.hpp" |
| #include "memory/padded.hpp" |
| #include "utilities/align.hpp" |
| #include "utilities/debug.hpp" |
| #include "utilities/globalDefinitions.hpp" |
| |
| // Creates an aligned padded array. |
| // The memory can't be deleted since the raw memory chunk is not returned. |
| template <class T, MEMFLAGS flags, size_t alignment> |
| PaddedEnd<T>* PaddedArray<T, flags, alignment>::create_unfreeable(uint length) { |
| // Check that the PaddedEnd class works as intended. |
| STATIC_ASSERT(is_aligned_(sizeof(PaddedEnd<T>), alignment)); |
| |
| // Allocate a chunk of memory large enough to allow for some alignment. |
| void* chunk = AllocateHeap(length * sizeof(PaddedEnd<T, alignment>) + alignment, flags); |
| |
| // Make the initial alignment. |
| PaddedEnd<T>* aligned_padded_array = (PaddedEnd<T>*)align_up(chunk, alignment); |
| |
| // Call the default constructor for each element. |
| for (uint i = 0; i < length; i++) { |
| ::new (&aligned_padded_array[i]) T(); |
| } |
| |
| return aligned_padded_array; |
| } |
| |
| template <class T, MEMFLAGS flags, size_t alignment> |
| T** Padded2DArray<T, flags, alignment>::create_unfreeable(uint rows, uint columns, size_t* allocation_size) { |
| // Calculate and align the size of the first dimension's table. |
| size_t table_size = align_up(rows * sizeof(T*), alignment); |
| // The size of the separate rows. |
| size_t row_size = align_up(columns * sizeof(T), alignment); |
| // Total size consists of the indirection table plus the rows. |
| size_t total_size = table_size + rows * row_size + alignment; |
| |
| // Allocate a chunk of memory large enough to allow alignment of the chunk. |
| void* chunk = AllocateHeap(total_size, flags); |
| // Clear the allocated memory. |
| memset(chunk, 0, total_size); |
| // Align the chunk of memory. |
| T** result = (T**)align_up(chunk, alignment); |
| void* data_start = (void*)((uintptr_t)result + table_size); |
| |
| // Fill in the row table. |
| for (size_t i = 0; i < rows; i++) { |
| result[i] = (T*)((uintptr_t)data_start + i * row_size); |
| } |
| |
| if (allocation_size != NULL) { |
| *allocation_size = total_size; |
| } |
| |
| return result; |
| } |
| |
| template <class T, MEMFLAGS flags, size_t alignment> |
| T* PaddedPrimitiveArray<T, flags, alignment>::create_unfreeable(size_t length) { |
| // Allocate a chunk of memory large enough to allow for some alignment. |
| void* chunk = AllocateHeap(length * sizeof(T) + alignment, flags); |
| |
| memset(chunk, 0, length * sizeof(T) + alignment); |
| |
| return (T*)align_up(chunk, alignment); |
| } |
| |
| #endif // SHARE_VM_MEMORY_PADDED_INLINE_HPP |