diff options
Diffstat (limited to 'libc/stdlib/malloc-930716/malloc.h')
-rw-r--r-- | libc/stdlib/malloc-930716/malloc.h | 63 |
1 files changed, 9 insertions, 54 deletions
diff --git a/libc/stdlib/malloc-930716/malloc.h b/libc/stdlib/malloc-930716/malloc.h index 34458c062..fc21a13cc 100644 --- a/libc/stdlib/malloc-930716/malloc.h +++ b/libc/stdlib/malloc-930716/malloc.h @@ -10,23 +10,13 @@ #include <sys/cdefs.h> -/* Underlying allocation function; successive calls should return - contiguous pieces of memory. */ -extern void *(*__morecore)(long); - -/* Default value of previous. */ -extern void *__default_morecore_init(long); -extern void *__default_morecore(long); - /* The allocator divides the heap into blocks of fixed size; large requests receive one or more whole blocks, and small requests receive a fragment of a block. Fragment sizes are powers of two, and all fragments of a block are the same size. When all the fragments in a block have been freed, the block itself is freed. - WARNING: BLOCKSIZE must be set greater than or equal to the - machine's page size for valloc() to work correctly. The default - definition here is 4096 bytes. */ -#define INT_BIT (CHAR_BIT * sizeof (int)) + */ +#define INT_BIT (CHAR_BIT * sizeof (size_t)) #define BLOCKLOG (INT_BIT > 16 ? 12 : 9) #define BLOCKSIZE (1 << BLOCKLOG) #define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE) @@ -42,66 +32,31 @@ extern void *__default_morecore(long); /* Data structure giving per-block information. */ union info { struct { - int type; /* Zero for a large block, or positive + size_t type; /* Zero for a large block, or positive giving the logarithm to the base two of the fragment size. */ union { struct { - int nfree; /* Free fragments in a fragmented block. */ - int first; /* First free fragment of the block. */ + size_t nfree; /* Free fragments in a fragmented block. */ + size_t first; /* First free fragment of the block. */ } frag; - int size; /* Size (in blocks) of a large cluster. */ + size_t size; /* Size (in blocks) of a large cluster. */ } info; } busy; struct { - int size; /* Size (in blocks) of a free cluster. */ - int next; /* Index of next free cluster. */ - int prev; /* Index of previous free cluster. */ + size_t size; /* Size (in blocks) of a free cluster. */ + size_t next; /* Index of next free cluster. */ + size_t prev; /* Index of previous free cluster. */ } free; }; -/* Pointer to first block of the heap. */ -extern char *_heapbase; - -/* Table indexed by block number giving per-block information. */ -extern union info *_heapinfo; - /* Address to block number and vice versa. */ #define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1) #define ADDRESS(B) ((void *) (((B) - 1) * BLOCKSIZE + _heapbase)) -/* Current search index for the heap table. */ -extern int _heapindex; - -/* Limit of valid info table indices. */ -extern int _heaplimit; - /* Doubly linked lists of free fragments. */ struct list { struct list *next; struct list *prev; }; -/* Count of blocks for each fragment size. */ -extern int _fragblocks[]; - -/* Free list headers for each fragment size. */ -extern struct list _fraghead[]; - -/* List of blocks allocated with `memalign' (or `valloc'). */ -struct alignlist -{ - struct alignlist *next; - __ptr_t aligned; /* The address that memaligned returned. */ - __ptr_t exact; /* The address that malloc returned. */ -}; -extern struct alignlist *_aligned_blocks; - -extern void _free_internal __P ((__ptr_t __ptr)); - -extern void free (void *); -extern void * malloc (size_t); -extern void * calloc (size_t, size_t); -extern void * valloc (size_t); -extern void * memalign (size_t, size_t); -extern void * realloc (void *, size_t); |