diff options
| -rw-r--r-- | qstd/memory.c | 11 | ||||
| -rw-r--r-- | qstd/memory.h | 1 |
2 files changed, 12 insertions, 0 deletions
diff --git a/qstd/memory.c b/qstd/memory.c index f245289..6ea43f7 100644 --- a/qstd/memory.c +++ b/qstd/memory.c @@ -209,6 +209,17 @@ void heap_free( heap_free_aligned(h, p); } +int heap_block_size(void* ptr) { + unsigned char* a; + int f = ~((unsigned)-1 >> 1); + ptrdiff_t shift; + a = ptr; + shift = a[-1]; + shift += 256 * shift == 0; + a -= shift; + return ((int*)a)[-1] & ~f; +} + /* void print_blocks(Heap* h) { int i, o; diff --git a/qstd/memory.h b/qstd/memory.h index 26c0382..842cb49 100644 --- a/qstd/memory.h +++ b/qstd/memory.h @@ -53,4 +53,5 @@ void heap_free( void* p ); void heap_defrag(Heap* h); +int heap_block_size(void* ptr); #endif |