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malloc: Use C11 atomics rather than atomic_exchange_and_add 

Replace a few counters using atomic_exchange_and_add with
atomic_fetch_add_relaxed.

Reviewed-by: Florian Weimer <fweimer@redhat.com>
This commit is contained in:
Wilco Dijkstra 2022-09-06 16:49:01 +01:00
parent 76fe56020e
commit 89d40cacd0
1 changed files with 3 additions and 3 deletions
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6
malloc/malloc.c
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@ -2460,11 +2460,11 @@ sysmalloc_mmap (INTERNAL_SIZE_T nb, size_t pagesize, int extra_flags, mstate av)
}
/* update statistics */
int new = atomic_exchange_and_add (&mp_.n_mmaps, 1) + 1;
int new = atomic_fetch_add_relaxed (&mp_.n_mmaps, 1) + 1;
atomic_max (&mp_.max_n_mmaps, new);
unsigned long sum;
sum = atomic_exchange_and_add (&mp_.mmapped_mem, size) + size;
sum = atomic_fetch_add_relaxed (&mp_.mmapped_mem, size) + size;
atomic_max (&mp_.max_mmapped_mem, sum);
check_chunk (av, p);
@ -3084,7 +3084,7 @@ mremap_chunk (mchunkptr p, size_t new_size)
set_head (p, (new_size - offset) | IS_MMAPPED);
INTERNAL_SIZE_T new;
new = atomic_exchange_and_add (&mp_.mmapped_mem, new_size - size - offset)
new = atomic_fetch_add_relaxed (&mp_.mmapped_mem, new_size - size - offset)
+ new_size - size - offset;
atomic_max (&mp_.max_mmapped_mem, new);
return p;