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authorGreg McGary <greg@mcgary.org>2000-07-21 07:51:23 +0000
committerGreg McGary <greg@mcgary.org>2000-07-21 07:51:23 +0000
commitcb5113c14551d5bc10412938fdc9072cb1005d11 (patch)
treee49aa7fb35ea8d49f7cdeec58a8d0ce705715dbb /malloc
parentdf0f2bf8cccb0d1c4fc829eac281ae8f0ecef734 (diff)
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* malloc/malloc.c (next_chunk, prev_chunk, inuse_bit_at_offset,
set_inuse_bit_at_offset, clear_inuse_bit_at_offset, set_foot): Define in terms of chunk_at_offset. (inuse, set_inuse, clear_inuse): Define in terms of next_chunk. (next_bin, prev_bin): offset by size of real array elements. (chunk_align): Make `m' a scalar, since that's how it's used. * malloc/malloc.c (next_chunk, prev_chunk, inuse_bit_at_offset, set_inuse_bit_at_offset, clear_inuse_bit_at_offset, set_foot): Define in terms of chunk_at_offset. (inuse, set_inuse, clear_inuse): Define in terms of next_chunk. (next_bin, prev_bin): offset by size of real array elements. (chunk_align): Make `m' a scalar, since that's how it's used. 2000-07-21 Greg McGary <greg@mcgary.org>
Diffstat (limited to 'malloc')
-rw-r--r--malloc/malloc.c44
1 files changed, 20 insertions, 24 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 981aae6..68d8752 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;