The GNU C Library

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The GNU C Library

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3.2.2 Unconstrained Allocation

The most general dynamic allocation facility is malloc. It allows you to allocate blocks of memory of any size at any time, make them bigger or smaller at any time, and free the blocks individually at any time (or never).

3.2.2.1 Basic Memory Allocation    Simple use of malloc.

3.2.2.2 Examples of malloc    Examples of malloc. xmalloc.

3.2.2.3 Freeing Memory Allocated with malloc    Use free to free a block you got with malloc.

3.2.2.4 Changing the Size of a Block    Use realloc to make a block bigger or smaller.

3.2.2.5 Allocating Cleared Space    Use calloc to allocate a block and clear it.

3.2.2.6 Efficiency Considerations for malloc    Efficiency considerations in use of these functions.

3.2.2.7 Allocating Aligned Memory Blocks    Allocating specially aligned memory.

3.2.2.8 Malloc Tunable Parameters    Use mallopt to adjust allocation parameters.

3.2.2.9 Heap Consistency Checking    Automatic checking for errors.

3.2.2.10 Memory Allocation Hooks    You can use these hooks for debugging programs that use malloc.

3.2.2.11 Statistics for Memory Allocation with malloc    Getting information about how much memory your program is using.

3.2.2.12 Summary of malloc-Related Functions    Summary of malloc and related functions.

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3.2.2.1 Basic Memory Allocation		Simple use of `malloc`.
3.2.2.2 Examples of `malloc`		Examples of `malloc`. `xmalloc`.
3.2.2.3 Freeing Memory Allocated with `malloc`		Use `free` to free a block you got with `malloc`.
3.2.2.4 Changing the Size of a Block		Use `realloc` to make a block bigger or smaller.
3.2.2.5 Allocating Cleared Space		Use `calloc` to allocate a block and clear it.
3.2.2.6 Efficiency Considerations for `malloc`		Efficiency considerations in use of these functions.
3.2.2.7 Allocating Aligned Memory Blocks		Allocating specially aligned memory.
3.2.2.8 Malloc Tunable Parameters		Use `mallopt` to adjust allocation parameters.
3.2.2.9 Heap Consistency Checking		Automatic checking for errors.
3.2.2.10 Memory Allocation Hooks		You can use these hooks for debugging programs that use `malloc`.
3.2.2.11 Statistics for Memory Allocation with `malloc`		Getting information about how much memory your program is using.
3.2.2.12 Summary of `malloc`-Related Functions		Summary of `malloc` and related functions.