diff options
Diffstat (limited to 'malloc/malloc.c')
| -rw-r--r-- | malloc/malloc.c | 44 |
1 files changed, 20 insertions, 24 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c index 981aae690d..68d8752de6 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -1330,11 +1330,11 @@ static void free_atfork(); /* Ptr to next physical malloc_chunk. */ -#define next_chunk(p) ((mchunkptr)( ((char*)(p)) + ((p)->size & ~PREV_INUSE) )) +#define next_chunk(p) chunk_at_offset((p), (p)->size & ~PREV_INUSE) /* Ptr to previous physical malloc_chunk */ -#define prev_chunk(p) ((mchunkptr)( ((char*)(p)) - ((p)->prev_size) )) +#define prev_chunk(p) chunk_at_offset((p), -(p)->prev_size) /* Treat space at ptr + offset as a chunk */ @@ -1350,8 +1350,7 @@ static void free_atfork(); /* extract p's inuse bit */ -#define inuse(p) \ - ((((mchunkptr)(((char*)(p))+((p)->size & ~PREV_INUSE)))->size) & PREV_INUSE) +#define inuse(p) (next_chunk(p)->size & PREV_INUSE) /* extract inuse bit of previous chunk */ @@ -1363,22 +1362,20 @@ static void free_atfork(); /* set/clear chunk as in use without otherwise disturbing */ -#define set_inuse(p) \ - ((mchunkptr)(((char*)(p)) + ((p)->size & ~PREV_INUSE)))->size |= PREV_INUSE +#define set_inuse(p) (next_chunk(p)->size |= PREV_INUSE) -#define clear_inuse(p) \ - ((mchunkptr)(((char*)(p)) + ((p)->size & ~PREV_INUSE)))->size &= ~(PREV_INUSE) +#define clear_inuse(p) (next_chunk(p)->size &= ~PREV_INUSE) /* check/set/clear inuse bits in known places */ -#define inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size & PREV_INUSE) +#define inuse_bit_at_offset(p, s) \ + (chunk_at_offset((p), (s))->size & PREV_INUSE) -#define set_inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size |= PREV_INUSE) +#define set_inuse_bit_at_offset(p, s) \ + (chunk_at_offset((p), (s))->size |= PREV_INUSE) -#define clear_inuse_bit_at_offset(p, s)\ - (((mchunkptr)(((char*)(p)) + (s)))->size &= ~(PREV_INUSE)) +#define clear_inuse_bit_at_offset(p, s) \ + (chunk_at_offset((p), (s))->size &= ~(PREV_INUSE)) @@ -1401,7 +1398,7 @@ static void free_atfork(); /* Set size at footer (only when chunk is not in use) */ -#define set_foot(p, s) (((mchunkptr)((char*)(p) + (s)))->prev_size = (s)) +#define set_foot(p, s) (chunk_at_offset(p, s)->prev_size = (s)) @@ -1409,10 +1406,10 @@ static void free_atfork(); /* access macros */ -#define bin_at(a, i) ((mbinptr)((char*)&(((a)->av)[2*(i) + 2]) - 2*SIZE_SZ)) -#define init_bin(a, i) ((a)->av[2*i+2] = (a)->av[2*i+3] = bin_at((a), i)) -#define next_bin(b) ((mbinptr)((char*)(b) + 2 * sizeof(mbinptr))) -#define prev_bin(b) ((mbinptr)((char*)(b) - 2 * sizeof(mbinptr))) +#define bin_at(a, i) ((mbinptr)((char*)&(((a)->av)[2*(i)+2]) - 2*SIZE_SZ)) +#define init_bin(a, i) ((a)->av[2*(i)+2] = (a)->av[2*(i)+3] = bin_at((a), (i))) +#define next_bin(b) ((mbinptr)((char*)(b) + 2 * sizeof(((arena*)0)->av[0]))) +#define prev_bin(b) ((mbinptr)((char*)(b) - 2 * sizeof(((arena*)0)->av[0]))) /* The first 2 bins are never indexed. The corresponding av cells are instead @@ -3531,7 +3528,7 @@ chunk_align(ar_ptr, nb, alignment) arena* ar_ptr; INTERNAL_SIZE_T nb; size_t alignment; #endif { - char* m; /* memory returned by malloc call */ + unsigned long m; /* memory returned by malloc call */ mchunkptr p; /* corresponding chunk */ char* brk; /* alignment point within p */ mchunkptr newp; /* chunk to return */ @@ -3545,9 +3542,9 @@ arena* ar_ptr; INTERNAL_SIZE_T nb; size_t alignment; if (p == 0) return 0; /* propagate failure */ - m = (char*)chunk2mem(p); + m = (unsigned long)chunk2mem(p); - if ((((unsigned long)(m)) % alignment) == 0) /* aligned */ + if ((m % alignment) == 0) /* aligned */ { #if HAVE_MMAP if(chunk_is_mmapped(p)) { @@ -3566,8 +3563,7 @@ arena* ar_ptr; INTERNAL_SIZE_T nb; size_t alignment; this is always possible. */ - brk = (char*)mem2chunk(((unsigned long)(m + alignment - 1)) & - -(long)alignment); + brk = (char*)mem2chunk(((m + alignment - 1)) & -(long)alignment); if ((long)(brk - (char*)(p)) < (long)MINSIZE) brk += alignment; newp = (mchunkptr)brk; |