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tlsf: Two-Level Segregated Fit Memory Allocator

Two-Level Segregated Fit memory allocator implementation derived from the BSD-licensed implementation by Matthew Conte. This code was based on the TLSF 1.4 spec and documentation found at http://www.gii.upv.es/tlsf/main/docs.

Features

  • O(1) cost for malloc, free, realloc, aligned_alloc
  • Low overhead per allocation (one word)
  • Low overhead for the TLSF metadata (~4kB)
  • Low fragmentation
  • Very small - only ~500 lines of code
  • Compiles to only a few kB of code and data
  • Uses a linear memory area, which is resized on demand
  • Not thread safe. API calls must be protected by a mutex in a multi-threaded environment.
  • Works in environments with only minimal libc, uses only stddef.h, stdbool.h, stdint.h and string.h.

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Two-Level Segregated Fit Memory Allocator

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  • C 97.1%
  • Makefile 2.9%