Getting the metadata of a smart pointer will not change over time.

Snaipe · Jan 14, 2015 · 67fa1a7 · 67fa1a7
1 parent 2a3deae
commit 67fa1a7
Show file tree

Hide file tree

Showing 2 changed files with 3 additions and 0 deletions.
diff --git a/src/mman.c b/src/mman.c
@@ -53,11 +53,13 @@ INLINE static size_t align(size_t s) {
     return (s + (sizeof (void *) - 1)) & ~(sizeof (void *) - 1);
 }
 
+__attribute__ ((pure))
 INLINE static s_meta *get_meta(void *ptr) {
     size_t *size = (size_t *) ptr - 1;
     return (s_meta *) ((char *) size - *size - sizeof (s_meta));
 }
 
+__attribute__ ((pure))
 void *get_smart_ptr_meta(void *ptr) {
     assert((size_t) ptr == align((size_t) ptr));
 

diff --git a/src/mman.h b/src/mman.h
@@ -45,6 +45,7 @@ typedef struct {
 
 extern s_allocator smalloc_allocator;
 
+__attribute__ ((pure))
 void *get_smart_ptr_meta(void *ptr);
 void *sref(void *ptr);
 __attribute__((malloc))