| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| |
| package memory |
| |
| type GoAllocator struct{} |
| |
| func NewGoAllocator() *GoAllocator { return &GoAllocator{} } |
| |
| func (a *GoAllocator) Allocate(size int) []byte { |
| buf := make([]byte, size+alignment) // padding for 64-byte alignment |
| addr := int(addressOf(buf)) |
| next := roundUpToMultipleOf64(addr) |
| if addr != next { |
| shift := next - addr |
| return buf[shift : size+shift : size+shift] |
| } |
| return buf[:size:size] |
| } |
| |
| func (a *GoAllocator) Reallocate(size int, b []byte) []byte { |
| if size == len(b) { |
| return b |
| } |
| |
| newBuf := a.Allocate(size) |
| copy(newBuf, b) |
| return newBuf |
| } |
| |
| func (a *GoAllocator) Free(b []byte) {} |
| |
| var ( |
| _ Allocator = (*GoAllocator)(nil) |
| ) |