stdlib.h

Methods

Return	Method
void*	malloc( size_t size )
void*	calloc( size_t n_items, size_t size )
void*	realloc( void *ptr, size_t size )
void	free( void *ptr )

Method Descriptions

void *malloc( size_t size )

a.k.a. memory allocation

Dynamically allocates a single block of contiguous memory according to size, containing garbage.

Returns a void pointer pointing to the first byte of allocated memory, otherwise it returns NULL if unsuccessful.

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void *calloc( size_t n_items, size_t size )

a.k.a. clear allocation

Dynamically allocates multiple blocks of memory by n_items blocks sized according to size, containing zeroes.

Returns a void pointer pointing to the first byte of allocated memory, otherwise it returns NULL if unsuccessful.

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void *realloc( void *ptr, size_t size )

a.k.a. reallocation

Attempts to change the size of the memory block by size, pointed to by ptr. Newly allocated bytes are not initialized.

Returns a void pointer pointing to the first byte of newly allocated memory, otherwise it returns NULL if unsuccessful.

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void free( void *ptr )

Deallocates the memory previously allocated by a call to calloc, malloc, or realloc.

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