This project is my own implementation of the C standard utility functions malloc, free and realloc, for dynamically allocating, freeing, and reallocating memory. The objectives of this project were to:
- use the mmap and munmap system calls to create and delete mapping in the virtual address space of the calling process.
- efficiently use virtual memory for memory allocations, including defragmentation of freed memory blocks.
- create a shared (dynamic) library (as opposed to a static library).
- manage the use of malloc, free, and realloc in a multi-threaded program (i.e. making the functions "thread safe").
The project contains a Makefile for the following:
make all to compile the shared library and created a symbolic link to it. The library is named libft_malloc_$HOSTTYPE.so, and the symbolic link libft_malloc.so. If $HOSTTYPE does not exist as an environmental variable, the Makefile will define it as follows: HOSTTYPE := $(shell uname -m)_$(shell uname -s)
make clean to remove the object files
make fclean to run make clean as well as remove the shared library and symbolic link
make re to run make fclean and make all
export LD_LIBRARY_PATH=<path to libft_malloc.so>- Add
#include "<path to inludes folder>/ft_malloc.h"to the .c file - Compile your C program:
gcc -L$LD_LIBRARY_PATH -o <yourexecutable> <yourfile.c> -lft_malloc