all: Rename BYTES_PER_WORD to MP_BYTES_PER_OBJ_WORD.

The "word" referred to by BYTES_PER_WORD is actually the size of mp_obj_t
which is not always the same as the size of a pointer on the target
architecture.  So rename this config value to better reflect what it
measures, and also prefix it with MP_.

For uses of BYTES_PER_WORD in setting the stack limit this has been
changed to sizeof(void *), because the stack usually grows with
machine-word sized values (eg an nlr_buf_t has many machine words in it).

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/py/gc.c b/py/gc.c
index be35dc2cc..53a0d9da4 100644
--- a/py/gc.c
+++ b/py/gc.c
@@ -49,7 +49,7 @@
 // detect untraced object still in use
 #define CLEAR_ON_SWEEP (0)
 
-#define WORDS_PER_BLOCK ((MICROPY_BYTES_PER_GC_BLOCK) / BYTES_PER_WORD)
+#define WORDS_PER_BLOCK ((MICROPY_BYTES_PER_GC_BLOCK) / MP_BYTES_PER_OBJ_WORD)
 #define BYTES_PER_BLOCK (MICROPY_BYTES_PER_GC_BLOCK)
 
 // ATB = allocation table byte