f_malloc.h File Reference

Simple, very fast, malloc library. More...

#include "meminfo.h"

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Data Structures

• struct fm_block

  Block of memory for F_MALLOC memory manager. More...
  

Defines

• #define F_MALLOC_HASH_BITMAP

  Use a bitmap to quickly find free fragments, should speed up especially startup (non-warmed-up malloc).
  

• #define F_MALLOC_OPTIMIZE   (1UL<<F_MALLOC_OPTIMIZE_FACTOR)

  Size to optimize for, (most allocs <= this size), must be 2^k.
  

Hash structure

- 0 ....

F_MALLOC_OPTIMIZE/ROUNDTO - small buckets, size increases with ROUNDTO from bucket to bucket

• +1 .... end - size = 2^k, big buckets

• #define fm_sums(qm)   do{}while(0)

  Debugging helper, summary and logs all allocated memory blocks.
  

• struct fm_block * fm_malloc_init (char *address, unsigned long size)

  Initialize memory manager malloc.
  

• void * fm_malloc (struct fm_block *qm, unsigned long size)

  Main memory manager allocation function.
  

• void fm_free (struct fm_block *qm, void *p)

  Main memory manager free function.
  

• void * fm_realloc (struct fm_block *qm, void *p, unsigned long size)

  Main memory manager realloc function.
  

• void fm_status (struct fm_block *qm)

  Report internal memory manager status.
  

• void fm_info (struct fm_block *qm, struct mem_info *info)

  Fills a malloc info structure with info about the block.
  

• unsigned long fm_available (struct fm_block *qm)

  Helper function for available memory report.
  

---

Detailed Description

Definition in file f_malloc.h.

---

Define Documentation

#define fm_sums

(

qm

)

do{}while(0)

Parameters:

qm

memory block

Definition at line 222 of file f_malloc.h.

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Function Documentation

unsigned long fm_available

(

struct fm_block *

qm

)

Parameters:

qm

memory block

Returns:

Returns how much free memory is available, on error (not compiled with bookkeeping code) returns (unsigned long)(-1)

void fm_free	(	struct fm_block *	qm,
		void *	p
	)

Main memory manager free function, provide functionality necessary for pkg_free

Parameters:

	qm	memory block
	p	freed memory

void fm_info	(	struct fm_block *	qm,
		struct mem_info *	info
	)

Fills a malloc info structure with info about the block, if a parameter is not supported, it will be filled with 0

Parameters:

	qm	memory block
	info	memory information

void* fm_malloc	(	struct fm_block *	qm,
		unsigned long	size
	)

Parameters:

	qm	memory block
	size	memory allocation size

Returns:

address of allocated memory

struct fm_block* fm_malloc_init	(	char *	address,
		unsigned long	size
	)			[read]

Parameters:

	address	start address for memory block
	size	Size of allocation

Returns:

return the fm_block

Referenced by init_pkg_mallocs().

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void* fm_realloc	(	struct fm_block *	qm,
		void *	p,
		unsigned long	size
	)

Main memory manager realloc function, provide functionality for pkg_realloc

Parameters:

	qm	memory block
	p	reallocated memory block
	size

Returns:

reallocated memory block

void fm_status

(

struct fm_block *

qm

)

Parameters:

qm

memory block