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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 13:54:38 +0000 |
commit | 8c1ab65c0f548d20b7f177bdb736daaf603340e1 (patch) | |
tree | df55b7e75bf43f2bf500845b105afe3ac3a5157e /libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c | |
parent | Initial commit. (diff) | |
download | wasi-libc-b0f726bfa464c79fdf040fa7daed6094ddbffb4c.tar.xz wasi-libc-b0f726bfa464c79fdf040fa7daed6094ddbffb4c.zip |
Adding upstream version 0.0~git20221206.8b7148f.upstream/0.0_git20221206.8b7148f
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c')
-rw-r--r-- | libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c b/libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c new file mode 100644 index 0000000..ce6a960 --- /dev/null +++ b/libc-top-half/musl/src/malloc/mallocng/malloc_usable_size.c @@ -0,0 +1,13 @@ +#include <stdlib.h> +#include "meta.h" + +size_t malloc_usable_size(void *p) +{ + if (!p) return 0; + struct meta *g = get_meta(p); + int idx = get_slot_index(p); + size_t stride = get_stride(g); + unsigned char *start = g->mem->storage + stride*idx; + unsigned char *end = start + stride - IB; + return get_nominal_size(p, end); +} |