malloc_usable_size() is a standard libc function. Implement it for the barebox allocators, dlmalloc and tlsf_malloc.
Signed-off-by: Sascha Hauer <[email protected]> --- common/dlmalloc.c | 12 ++++++++++++ common/tlsf_malloc.c | 11 +++++++++++ include/malloc.h | 1 + 3 files changed, 24 insertions(+) diff --git a/common/dlmalloc.c b/common/dlmalloc.c index c41487d54b..99f666aada 100644 --- a/common/dlmalloc.c +++ b/common/dlmalloc.c @@ -1431,6 +1431,18 @@ void free(void *mem) frontlink(p, sz, idx, bck, fwd); } +size_t malloc_usable_size(void *mem) +{ + mchunkptr p; + size_t size; + + if (!mem) + return 0; + + p = mem2chunk(mem); + return chunksize(p); +} + /* Realloc algorithm: diff --git a/common/tlsf_malloc.c b/common/tlsf_malloc.c index 981f09de41..f07ef5645b 100644 --- a/common/tlsf_malloc.c +++ b/common/tlsf_malloc.c @@ -38,6 +38,17 @@ void free(void *mem) } EXPORT_SYMBOL(free); +size_t malloc_usable_size(void *mem) +{ + size_t size; + + if (!mem) + return 0; + + return tlsf_block_size(mem); +} +EXPORT_SYMBOL(malloc_usable_size); + void *realloc(void *oldmem, size_t bytes) { void *mem = tlsf_realloc(tlsf_mem_pool, oldmem, bytes); diff --git a/include/malloc.h b/include/malloc.h index d63853b91e..5cdff0a4f9 100644 --- a/include/malloc.h +++ b/include/malloc.h @@ -6,6 +6,7 @@ #include <types.h> void *malloc(size_t) __alloc_size(1); +size_t malloc_usable_size(void *); void free(void *); void *realloc(void *, size_t) __realloc_size(2); void *memalign(size_t, size_t) __alloc_size(2); -- 2.39.2
