Aufgabe 7: Anwendung

Functions
alloc.h File Reference

C-style dynamic memory allocation interface. More...

#include "types.h"
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Functions

void * malloc (size_t size)
 Allocate a memory block The memory is not initialized. More...
 
void free (void *ptr)
 Free an allocated memory block. More...
 
void * realloc (void *ptr, size_t size)
 Change the size of an allocated memory block The contents will be unchanged in the range from the start of the region up to the minimum of the old and new sizes. If the new size is larger than the old size, the added memory will not be initialized. More...
 
void * calloc (size_t nmemb, size_t size)
 Allocate memory for an array of elements The memory is set to zero. More...
 

Detailed Description

C-style dynamic memory allocation interface.

Function Documentation

void * malloc ( size_t  size)

Allocate a memory block The memory is not initialized.

Parameters
sizeRequested size of memory in bytes.
Returns
Pointer to memory or nullptr on error (no memory available) or if size was zero.
Optional:
Implement method
void free ( void *  ptr)

Free an allocated memory block.

Parameters
ptrPointer to an previously allocated memory block.
Optional:
Implement method
void * realloc ( void *  ptr,
size_t  size 
)

Change the size of an allocated memory block The contents will be unchanged in the range from the start of the region up to the minimum of the old and new sizes. If the new size is larger than the old size, the added memory will not be initialized.

Parameters
ptrPointer to an previously allocated memory block. If nullptr, then the call is equivalent to malloc().
sizeNew size of the memory block. If equal to zero, then the call is equivalent to free
Returns
Pointer to new memory block or nullptr on error
Optional:
Implement method
void * calloc ( size_t  nmemb,
size_t  size 
)

Allocate memory for an array of elements The memory is set to zero.

Parameters
nmembNumber of elements
sizeSize of an element in bytes
Returns
pointer to the allocated memory or nullptr if the request fails
Optional:
Implement method