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py: Add MICROPY_OBJ_BASE_ALIGNMENT to help with 16-bit ports.

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This commit is contained in:
Damien George 2015-02-08 13:42:00 +00:00
parent 5351a48185
commit 28631537bd
2 changed files with 9 additions and 1 deletions
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8
py/mpconfig.h
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@ -536,6 +536,14 @@ typedef double mp_float_t;
/*****************************************************************************/
/* Miscellaneous settings */
// All uPy objects in ROM must be aligned on at least a 4 byte boundary
// so that the small-int/qstr/pointer distinction can be made. For machines
// that don't do this (eg 16-bit CPU), define the following macro to something
// like __attribute__((aligned(4))).
#ifndef MICROPY_OBJ_BASE_ALIGNMENT
#define MICROPY_OBJ_BASE_ALIGNMENT
#endif
// On embedded platforms, these will typically enable/disable irqs.
#ifndef MICROPY_BEGIN_ATOMIC_SECTION
#define MICROPY_BEGIN_ATOMIC_SECTION() (0)

2
py/obj.h
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@ -46,7 +46,7 @@ typedef machine_const_ptr_t mp_const_obj_t;
struct _mp_obj_type_t;
struct _mp_obj_base_t {
const struct _mp_obj_type_t *type;
const struct _mp_obj_type_t *type MICROPY_OBJ_BASE_ALIGNMENT;
};
typedef struct _mp_obj_base_t mp_obj_base_t;