py: Wrap all obj-ptr conversions in MP_OBJ_TO_PTR/MP_OBJ_FROM_PTR.

This allows the mp_obj_t type to be configured to something other than a
pointer-sized primitive type.

This patch also includes additional changes to allow the code to compile
when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
mp_uint_t, and various casts.

1 files changed, 1 insertions, 1 deletions

diff --git a/py/misc.h b/py/misc.h
index 1a0c085ac..0ccb52619 100644
--- a/py/misc.h
+++ b/py/misc.h
@@ -101,7 +101,7 @@ size_t m_get_peak_bytes_allocated(void);
 #define MP_ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
 // align ptr to the nearest multiple of "alignment"
-#define MP_ALIGN(ptr, alignment) (void*)(((mp_uint_t)(ptr) + ((alignment) - 1)) & ~((alignment) - 1))
+#define MP_ALIGN(ptr, alignment) (void*)(((uintptr_t)(ptr) + ((alignment) - 1)) & ~((alignment) - 1))
 
 /** unichar / UTF-8 *********************************************/