| /** @file |
| |
| Implementation of the proxy allocators. |
| |
| @section license License |
| |
| 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. |
| */ |
| #include "I_EventSystem.h" |
| |
| int thread_freelist_high_watermark = 512; |
| int thread_freelist_low_watermark = 32; |
| extern int cmd_disable_pfreelist; |
| |
| void * |
| thread_alloc(Allocator &a, ProxyAllocator &l) |
| { |
| if (!cmd_disable_pfreelist && l.freelist) { |
| void *v = l.freelist; |
| l.freelist = *static_cast<void **>(l.freelist); |
| --(l.allocated); |
| return v; |
| } |
| return a.alloc_void(); |
| } |
| |
| void |
| thread_freeup(Allocator &a, ProxyAllocator &l) |
| { |
| void *head = l.freelist; |
| void *tail = l.freelist; |
| size_t count = 0; |
| while (l.freelist && l.allocated > thread_freelist_low_watermark) { |
| tail = l.freelist; |
| l.freelist = *static_cast<void **>(l.freelist); |
| --(l.allocated); |
| ++count; |
| } |
| |
| if (unlikely(count == 1)) { |
| a.free_void(tail); |
| } else if (count > 0) { |
| a.free_void_bulk(head, tail, count); |
| } |
| |
| ink_assert(l.allocated >= thread_freelist_low_watermark); |
| } |