slab.c File Reference

(29312b1 fbconsole, panic: render panic after framebuffer was given to userspace - without clearing screen contents)

#include "slab.h"
#include "bitmap.h"
#include "string.h"
#include "panic.h"

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Functions
void	init_slab (ptr_t mem_start, ptr_t mem_end, size_t allocation_size)
ptr_t	slab_alloc (SlabHeader *slab)
void	slab_free (SlabHeader *slab, ptr_t mem)

Function Documentation

init_slab()

void init_slab	(	ptr_t	mem_start,
		ptr_t	mem_end,
		size_t	allocation_size
	)

Initialize a new slab allocator at the given memory location. After initialization, you can use mem_start as pointer to SlabHeader for more operations.

Parameters

mem_start	Memory address where the slab allocator region begins
mem_end	Memory address where the slab allocator region ends
allocation_size	Size of single objects in this allocator

Definition at line 6 of file slab.c.

References bitmap_size(), header, and memset().

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slab_alloc()

ptr_t slab_alloc

(

SlabHeader *

slab

)

Allocate object from slab allocator region.

Parameters

slab	mem_start given to init_slab before

Returns

Address in memory with the allocated object, NULL if full

Definition at line 22 of file slab.c.

References bitmap_get(), bitmap_set(), SlabHeader::num_entries, panic_message(), and slab_mem().

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slab_free()

void slab_free	(	SlabHeader *	slab,
		ptr_t	memory
	)

Free object in slab allocator region.

Parameters

slab	mem_start given to init_slab before
memory	Address to mark as free

Definition at line 37 of file slab.c.

References bitmap_clear(), and slab_index().

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