You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.6 KiB
39 lines
1.6 KiB
7 months ago
|
/*
|
||
|
|
* Copyright (C) 2016 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 _SLAB_H_
|
||
|
|
#define _SLAB_H_
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
struct SlabAllocator;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
//thread/interrupt safe. allocations will not fail if space exists. even in interrupts.
|
||
|
|
//itemAlign over 4 will not be guaranteed since the heap does not hand out chunks with that kind of alignment
|
||
|
|
struct SlabAllocator* slabAllocatorNew(uint32_t itemSz, uint32_t itemAlign, uint32_t numItems);
|
||
|
|
void slabAllocatorDestroy(struct SlabAllocator *allocator);
|
||
|
|
void* slabAllocatorAlloc(struct SlabAllocator *allocator);
|
||
|
|
void slabAllocatorFree(struct SlabAllocator *allocator, void *ptr);
|
||
|
|
|
||
|
|
void* slabAllocatorGetNth(struct SlabAllocator *allocator, uint32_t idx); // -> pointer or NULL if that slot is empty may be not int-safe. YMMV
|
||
|
|
uint32_t slabAllocatorGetIndex(struct SlabAllocator *allocator, void *ptr); // -> index or -1 if invalid pointer
|
||
|
|
uint32_t slabAllocatorGetNumItems(struct SlabAllocator *allocator); // simply say hwo many items it can hold max (numItems passed to constructor)
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|