malloc.h File Reference

#include <debug.h>
#include <stddef.h>

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Functions
void	malloc_init (void)
	Initializes the malloc() descriptors. More...
void *	malloc (size_t) __attribute__((malloc))
	Obtains and returns a new block of at least SIZE bytes. More...
void *	calloc (size_t, size_t) __attribute__((malloc))
	Allocates and return A times B bytes initialized to zeroes. More...
void *	realloc (void *, size_t)
	Attempts to resize OLD_BLOCK to NEW_SIZE bytes, possibly moving it in the process. More...
void	free (void *)
	threads/malloc.h More...

Function Documentation

calloc()

void * calloc	(	size_t	a,
		size_t	b
	)

Allocates and return A times B bytes initialized to zeroes.

Returns a null pointer if memory is not available.

Definition at line 159 of file malloc.c.

References malloc(), memset(), NULL, and block::size.

Referenced by dir_open(), file_open(), and inode_create().

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free()

void free

(

void *

p

)

threads/malloc.h

threads/malloc.h

Definition at line 219 of file malloc.c.

References arena_to_block(), ASSERT, desc::block_size, block_to_arena(), desc::blocks_per_arena, arena::desc, arena::free_cnt, block::free_elem, desc::free_list, list_push_front(), list_remove(), desc::lock, lock_acquire(), lock_release(), memset(), NULL, palloc_free_multiple(), and palloc_free_page().

Referenced by bitmap_create(), bitmap_destroy(), dir_close(), dir_open(), file_close(), file_open(), fsutil_append(), fsutil_extract(), hash_destroy(), inode_close(), inode_create(), inode_read_at(), inode_write_at(), read_partition_table(), realloc(), rehash(), and test_sleep().

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malloc()

void * malloc

(

size_t

size

)

Obtains and returns a new block of at least SIZE bytes.

Returns a null pointer if memory is not available.

Definition at line 90 of file malloc.c.

References ARENA_MAGIC, arena_to_block(), desc::block_size, block_to_arena(), desc::blocks_per_arena, arena::desc, desc_cnt, descs, DIV_ROUND_UP, arena::free_cnt, block::free_elem, desc::free_list, list_empty(), list_entry, list_pop_front(), list_push_back(), desc::lock, lock_acquire(), lock_release(), arena::magic, NULL, palloc_get_multiple(), palloc_get_page(), and PGSIZE.

Referenced by bitmap_create(), block_register(), calloc(), found_partition(), fsutil_append(), fsutil_extract(), hash_init(), inode_open(), inode_read_at(), inode_write_at(), read_partition_table(), realloc(), rehash(), and test_sleep().

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malloc_init()

void malloc_init

(

void

)

Initializes the malloc() descriptors.

Definition at line 72 of file malloc.c.

References ASSERT, desc::block_size, block_size(), desc::blocks_per_arena, desc_cnt, descs, desc::free_list, list_init(), desc::lock, lock_init(), and PGSIZE.

Referenced by pintos_init().

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realloc()

void * realloc	(	void *	old_block,
		size_t	new_size
	)

Attempts to resize OLD_BLOCK to NEW_SIZE bytes, possibly moving it in the process.

If successful, returns the new block; on failure, returns a null pointer. A call with null OLD_BLOCK is equivalent to malloc(NEW_SIZE). A call with zero NEW_SIZE is equivalent to free(OLD_BLOCK).

Definition at line 195 of file malloc.c.

References block_size(), free(), malloc(), memcpy(), and NULL.

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