tlsf-v3.1

所属分类:其他嵌入式/单片机内容
开发工具:C/C++
文件大小:13KB
下载次数:7
上传日期:2017-05-21 01:54:07
上 传 者chen740551940
说明:  TLSF-V3.1 动态内存算法源码。可以很方便的移植到各种嵌入式系统中。
(TLSF-V3.1 Two-Level Segregated Fit ,a New Dynamic Memory Allocator for Real-Time Systems.)

文件列表:
tlsf-v3.1 (0, 2016-04-11)
__MACOSX (0, 2017-05-21)
__MACOSX\tlsf-v3.1 (0, 2017-05-21)
tlsf-v3.1\tlsf.c (34586, 2016-04-11)
__MACOSX\tlsf-v3.1\._tlsf.c (212, 2016-04-11)
tlsf-v3.1\tlsf.h (3523, 2016-04-11)
__MACOSX\tlsf-v3.1\._tlsf.h (212, 2016-04-11)
__MACOSX\._tlsf-v3.1 (212, 2016-04-11)

# tlsf Two-Level Segregated Fit memory allocator implementation. Written by Matthew Conte (matt@baisoku.org). Released under the BSD license. Features -------- * O(1) cost for malloc, free, realloc, memalign * Extremely low overhead per allocation (4 bytes) * Low overhead per TLSF management of pools (~3kB) * Low fragmentation * Compiles to only a few kB of code and data * Support for adding and removing memory pool regions on the fly Caveats ------- * Currently, assumes architecture can make 4-byte aligned accesses * Not designed to be thread safe; the user must provide this Notes ----- This code was based on the TLSF 1.4 spec and documentation found at: http://www.gii.upv.es/tlsf/main/docs It also leverages the TLSF 2.0 improvement to shrink the per-block overhead from 8 to 4 bytes. History ------- 2016/04/10 - v3.1 * Code moved to github * tlsfbits.h rolled into tlsf.c * License changed to BSD 2014/02/08 - v3.0 * This version is based on improvements from 3DInteractive GmbH * Interface changed to allow more than one memory pool * Separated pool handling from control structure (adding, removing, debugging) * Control structure and pools can still be constructed in the same memory block * Memory blocks for control structure and pools are checked for alignment * Added functions to retrieve control structure size, alignment size, min and max block size, overhead of pool structure, and overhead of a single allocation * Minimal Pool size is tlsf_block_size_min() + tlsf_pool_overhead() * Pool must be empty when it is removed, in order to allow O(1) removal 2011/10/20 - v2.0 * ***-bit support * More compiler intrinsics for ffs/fls * ffs/fls verification during TLSF creation in debug builds 2008/04/04 - v1.9 * Add tlsf_heap_check, a heap integrity check * Support a predefined tlsf_assert macro * Fix realloc case where block should shrink; if adjacent block is in use, execution would go down the slow path 2007/02/08 - v1.8 * Fix for unnecessary reallocation in tlsf_realloc 2007/02/03 - v1.7 * tlsf_heap_walk takes a callback * tlsf_realloc now returns NULL on failure * tlsf_memalign optimization for 4-byte alignment * Usage of size_t where appropriate 2006/11/21 - v1.6 * ffs/fls broken out into tlsfbits.h * tlsf_overhead queries per-pool overhead 2006/11/07 - v1.5 * Smart realloc implementation * Smart memalign implementation 2006/10/11 - v1.4 * Add some ffs/fls implementations * Minor code footprint reduction 2006/09/14 - v1.3 * Profiling indicates heavy use of blocks of size 1-128, so implement small block handling * Reduce pool overhead by about 1kb * Reduce minimum block size from 32 to 12 bytes * Realloc bug fix 2006/09/09 - v1.2 * Add tlsf_block_size * Static assertion mechanism for invariants * Minor bugfixes 2006/09/01 - v1.1 * Add tlsf_realloc * Add tlsf_walk_heap 2006/08/25 - v1.0 * First release

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