65 /*          --------------------------------------
66  *          | size                               |
67  *   chunk->| When allocated: data               |
70  *          --------------------------------------
73  * address of 'size' may not be aligned to MALLOC_CHUNK_ALIGN. But it
76  * size is set so that a chunk starting at chunk+size will be
79  * We can't use a single struct containing both size and next as that
80  * may insert padding between the size and pointer fields when
85     size_t      size;  member
104 /* nominal "page size" */
107 /* Minimum allocation size */
110 /* Maximum allocation size */
111 #define MALLOC_MAXSIZE 		(SIZE_MAX - (MALLOC_HEAD + 2*MALLOC_CHUNK_ALIGN))
115     return (size_t *) ((char *) chunk - MALLOC_HEAD);  in _size_ref()
123 static inline void _set_size(chunk_t *chunk, size_t size)  in _set_size()  argument
125     *_size_ref(chunk) = size;  in _set_size()
139 /* Work around compiler optimizing away stores to 'size' field before
175     return (void *) ((char *) c - MALLOC_HEAD);  in chunk_to_blob()
178 /* end of chunk -- address of first byte past chunk storage */
186 /* next chunk in memory -- address of chunk header past this chunk */
193 /* chunk size needed to hold 'malloc_size' bytes */
204     malloc_size += (MALLOC_CHUNK_ALIGN - MALLOC_HEAD_ALIGN);  in chunk_size()
206     /* Make sure the requested size is big enough to hold a free chunk */  in chunk_size()
207     malloc_size = MAX(MALLOC_MINSIZE, malloc_size);  in chunk_size()
215     return _size(c) - MALLOC_HEAD;  in chunk_usable()
218 /* assign 'size' to the specified chunk and return it to the free
221 make_free_chunk(chunk_t *c, size_t size)  in make_free_chunk()  argument
223     _set_size(c, size);  in make_free_chunk()