Oneway malloc

A malloc implementation without free for boards where the toolchain does not implement dynamic memory allocation. More...

Detailed Description

A malloc implementation without free for boards where the toolchain does not implement dynamic memory allocation.

The toolchain of MSP-430, for example, does not contain malloc() and friends. These functions provide the same interface as the stdlib functions, but the option to free memory.

Note

You should prefer statically allocated memory whenever possible.

See also

Two-Level Segregated Fit memory allocator

Files
file	malloc.h

Functions
void *	malloc (size_t size)
	Allocation a block of memory.
void *	realloc (void *ptr, size_t size)
	Allocated a new block of memory and move the existing content.
void *	calloc (size_t size, size_t cnt)
	Allocate a memory block and set all its content to zeroes.
void	free (void *ptr)
	This is a no-op.

Function Documentation

calloc()

void * calloc	(	size_t	size,
		size_t	cnt
	)

Allocate a memory block and set all its content to zeroes.

Please see malloc() for more information.

Note

This implementation of calloc() does not catch integer overflows

Parameters

[in]	size	One factor of the number of bytes to allocated.
[in]	cnt	The other factor of the number of bytes to allocated.

Returns

The new memory block. NULL if the "heap" is exhausted.

free()

void free

(

void *

ptr

)

This is a no-op.

You read correctly: This function does noting.

Note

Keep in mind that this function does not free the memory. It does nothing.

Parameters

[in]

ptr

The ignored argument.

malloc()

void * malloc

(

size_t

size

)

Allocation a block of memory.

Parameters

[in]

size

Size of the block to allocate in bytes.

Returns

The new memory block. NULL if the "heap" is exhausted.

realloc()

void * realloc	(	void *	ptr,
		size_t	size
	)

Allocated a new block of memory and move the existing content.

This function allocates a new block of memory and memcpy()s the content of the one ptr there.

         We do not know the size of the old block, so illegal reads would be likely,
         if it was not for the fact that the memory heap up.

Parameters

[in]	ptr	Old memory block that was allocated with malloc(), calloc() or realloc().
[in]	size	Size of the new block to allocated in bytes.

Returns

The new memory block. NULL if the "heap" is exhausted.