* only make objects long lived if they are on the GC heap

1 files changed, 11 insertions, 0 deletions

diff --git a/py/gc.h b/py/gc.h
index 02bf45158..cd63ba94c 100644
--- a/py/gc.h
+++ b/py/gc.h
@@ -29,8 +29,19 @@
 #include <stdint.h>
 
 #include "py/mpconfig.h"
+#include "py/mpstate.h"
 #include "py/misc.h"
 
+#define WORDS_PER_BLOCK ((MICROPY_BYTES_PER_GC_BLOCK) / BYTES_PER_WORD)
+#define BYTES_PER_BLOCK (MICROPY_BYTES_PER_GC_BLOCK)
+
+// ptr should be of type void*
+#define VERIFY_PTR(ptr) ( \
+        ((uintptr_t)(ptr) & (BYTES_PER_BLOCK - 1)) == 0      /* must be aligned on a block */ \
+        && ptr >= (void*)MP_STATE_MEM(gc_pool_start)     /* must be above start of pool */ \
+        && ptr < (void*)MP_STATE_MEM(gc_pool_end)        /* must be below end of pool */ \
+    )
+
 void gc_init(void *start, void *end);
 void gc_deinit(void);