gc: Use byte* pointers instead of void* for pointer arithmetic
void* is of unknown size
diff --git a/py/gc.c b/py/gc.c
index 7fab040..452736b 100644
--- a/py/gc.c
+++ b/py/gc.c
@@ -120,7 +120,7 @@
// F = A * BLOCKS_PER_ATB / BLOCKS_PER_FTB
// P = A * BLOCKS_PER_ATB * BYTES_PER_BLOCK
// => T = A * (1 + BLOCKS_PER_ATB / BLOCKS_PER_FTB + BLOCKS_PER_ATB * BYTES_PER_BLOCK)
- machine_uint_t total_byte_len = end - start;
+ machine_uint_t total_byte_len = (byte*)end - (byte*)start;
#if MICROPY_ENABLE_FINALISER
gc_alloc_table_byte_len = total_byte_len * BITS_PER_BYTE / (BITS_PER_BYTE + BITS_PER_BYTE * BLOCKS_PER_ATB / BLOCKS_PER_FTB + BITS_PER_BYTE * BLOCKS_PER_ATB * BYTES_PER_BLOCK);
#else
@@ -136,8 +136,8 @@
#endif
machine_uint_t gc_pool_block_len = gc_alloc_table_byte_len * BLOCKS_PER_ATB;
- gc_pool_start = end - gc_pool_block_len * BYTES_PER_BLOCK;
- gc_pool_end = end;
+ gc_pool_start = (machine_uint_t*)((byte*)end - gc_pool_block_len * BYTES_PER_BLOCK);
+ gc_pool_end = (machine_uint_t*)end;
// clear ATBs
memset(gc_alloc_table_start, 0, gc_alloc_table_byte_len);
@@ -400,7 +400,7 @@
}
// get pointer to first block
- void *ret_ptr = (void*)(gc_pool_start + start_block * WORDS_PER_BLOCK);
+ byte *ret_ptr = (byte*)(gc_pool_start + start_block * WORDS_PER_BLOCK);
// zero out the additional bytes of the newly allocated blocks
// This is needed because the blocks may have previously held pointers
@@ -571,7 +571,7 @@
}
// zero out the additional bytes of the newly allocated blocks (see comment above in gc_alloc)
- memset(ptr_in + n_bytes, 0, new_blocks * BYTES_PER_BLOCK - n_bytes);
+ memset((byte*)ptr_in + n_bytes, 0, new_blocks * BYTES_PER_BLOCK - n_bytes);
return ptr_in;
}