https://github.com/NanXiao/umalloc

A tiny Unix dynamic memory allocator library.
https://github.com/NanXiao/umalloc

Last synced: 11 days ago
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A tiny Unix dynamic memory allocator library.

• Host: GitHub
• URL: https://github.com/NanXiao/umalloc
• Owner: NanXiao
• License: bsd-3-clause
• Created: 2017-09-22T23:36:26.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2017-10-10T02:03:02.000Z (over 6 years ago)
• Last Synced: 2024-02-29T10:33:33.607Z (4 months ago)
• Language: C
• Size: 6.84 KB
• Stars: 62
• Watchers: 5
• Forks: 11
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-stars - umalloc - A tiny Unix dynamic memory allocator library. (C)
• awesome-stars - NanXiao/umalloc - A tiny Unix dynamic memory allocator library. (C)

README

        
# umalloc

A tiny Unix dynamic memory allocator library. The allocated memory is divided into `4` parts:  

	 -------------------------------------------------

	|          |          |               |          |

	|chunk_size|head_guard|    chunk      |tail_guard|

	|          |          |               |          |

     ------------------------------------------------- 

Besides the allocated memory are initialized to `0`, when free the memory, it will check following cases:  

(1) Both up and down out-of-bound memory error;  

(2) Double-free pointer error.  

## Usage 

	$ git clone https://github.com/NanXiao/umalloc.git

	$ cd umalloc

	$ make && make install

## Example:  

    #include 

    #include 

    #include 

    #include 

    #include 

    int main(void)

    {

        uint32_t size = 1;

        for (size = 1; size < UINT32_MAX; size++)

        {

            printf("size=%" PRIu32 "\n", size);

            char *p = umalloc(size);

            memset(p, 0xFF, size);

            p = urealloc(p, size - 1);

            p = urealloc(p, size);

            ufree(p);

        }

        return 0;

    }

Build and run it:  

	$ cc -I/usr/local/include -L/usr/local/lib -Wall -o test test.c -lumalloc

	$ ./test