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simplified the uncocpyable check in moo_shallowcopy()

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This commit is contained in:
hyunghwan.chung 2019-09-22 16:26:30 +00:00
parent de72bc6b58
commit cc9c1a3925
4 changed files with 30 additions and 18 deletions
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10
moo/README.md
View File

@ -84,6 +84,16 @@ X new -> create an object with 2 words.
X new: 4 -> create an object with 6 words.
```
if an object is asked to instantiate with trailer in the class defintion, it becomes
uncopyable, without the #uncopyable attribute.
```
class Shader(Object) from 'shader'
{
// if the shaer module calls moo_setclasstrsize(), an instance of Shader is uncopyable
}
```
### Flow Control
```
k := if (i < 20) { 30 } else { 40 }.

6
moo/lib/gc.c
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@ -646,7 +646,7 @@ int moo_ignite (moo_t* moo, moo_oow_t heapsz)
moo->_nil = moo_allocbytes(moo, MOO_SIZEOF(moo_obj_t));
if (!moo->_nil) goto oops;
moo->_nil->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 1, moo->igniting, 0, 0, 0, 0);
moo->_nil->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 1, moo->igniting, 0, 0, 0, 0, 0);
moo->_nil->_size = 0;
if (ignite_1(moo) <= -1 || ignite_2(moo) <= -1 || ignite_3(moo)) goto oops;;
@ -1126,10 +1126,10 @@ moo_oop_t moo_shallowcopy (moo_t* moo, moo_oop_t oop)
moo_oop_t z;
moo_oow_t total_bytes;
if (MOO_OBJ_GET_FLAGS_UNCOPYABLE(oop) || MOO_OBJ_GET_FLAGS_TRAILER(oop))
if (MOO_OBJ_GET_FLAGS_UNCOPYABLE(oop))
{
/* TOOD: should i disallow this or return without copying? */
moo_seterrbfmt (moo, MOO_EPERM, "not allowed to copy process or object with trailer");
moo_seterrbfmt (moo, MOO_EPERM, "uncopyable object");
return MOO_NULL;
}

5
moo/lib/moo.h
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@ -361,7 +361,7 @@ typedef enum moo_gcfin_t moo_gcfin_t;
/* [NOTE] this macro doesn't check the range of the actual value.
* make sure that the value of each bit fields given falls within the
* possible range of the defined bits */
#define MOO_OBJ_MAKE_FLAGS(_ty,_u,_e,_k,_p,_m,_g,_tr,_h) ( \
#define MOO_OBJ_MAKE_FLAGS(_ty,_u,_e,_k,_p,_m,_g,_tr,_h,_uncp) ( \
(((moo_oow_t)(_ty)) << MOO_OBJ_FLAGS_TYPE_SHIFT) | \
(((moo_oow_t)(_u)) << MOO_OBJ_FLAGS_UNIT_SHIFT) | \
(((moo_oow_t)(_e)) << MOO_OBJ_FLAGS_EXTRA_SHIFT) | \
@ -370,7 +370,8 @@ typedef enum moo_gcfin_t moo_gcfin_t;
(((moo_oow_t)(_m)) << MOO_OBJ_FLAGS_MOVED_SHIFT) | \
(((moo_oow_t)(_g)) << MOO_OBJ_FLAGS_PROC_SHIFT) | \
(((moo_oow_t)(_tr)) << MOO_OBJ_FLAGS_TRAILER_SHIFT) | \
(((moo_oow_t)(_h)) << MOO_OBJ_FLAGS_HASH_SHIFT) \
(((moo_oow_t)(_h)) << MOO_OBJ_FLAGS_HASH_SHIFT) | \
(((moo_oow_t)(_uncp)) << MOO_OBJ_FLAGS_UNCOPYABLE_SHIFT) \
)
#define MOO_OBJ_FLAGS_KERNEL_USER 0 /* not a kernel object */

11
moo/lib/obj.c
View File

@ -76,7 +76,7 @@ moo_oop_t moo_allocoopobj (moo_t* moo, moo_oow_t size)
hdr = (moo_oop_oop_t)moo_allocbytes(moo, MOO_SIZEOF(moo_obj_t) + nbytes_aligned);
if (!hdr) return MOO_NULL;
hdr->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 0, moo->igniting, 0, 0, 0, 0);
hdr->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 0, moo->igniting, 0, 0, 0, 0, 0);
MOO_OBJ_SET_SIZE (hdr, size);
MOO_OBJ_SET_CLASS (hdr, moo->_nil);
@ -102,7 +102,7 @@ moo_oop_t moo_allocoopobjwithtrailer (moo_t* moo, moo_oow_t size, const moo_oob_
hdr = (moo_oop_oop_t)moo_allocbytes(moo, MOO_SIZEOF(moo_obj_t) + nbytes_aligned);
if (!hdr) return MOO_NULL;
hdr->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 0, moo->igniting, 0, 0, 1, 0); /* TRAILER bit -> 1 */
hdr->_flags = MOO_OBJ_MAKE_FLAGS(MOO_OBJ_TYPE_OOP, MOO_SIZEOF(moo_oop_t), 0, 0, moo->igniting, 0, 0, 1, 0, 1); /* TRAILER -> 1, UNCOPYABLE -> 1 */
MOO_OBJ_SET_SIZE (hdr, size);
MOO_OBJ_SET_CLASS (hdr, moo->_nil);
@ -149,7 +149,7 @@ static MOO_INLINE moo_oop_t alloc_numeric_array (moo_t* moo, const void* ptr, mo
hdr = (moo_oop_t)moo_allocbytes(moo, MOO_SIZEOF(moo_obj_t) + nbytes_aligned);
if (!hdr) return MOO_NULL;
hdr->_flags = MOO_OBJ_MAKE_FLAGS(type, unit, extra, 0, moo->igniting, 0, 0, 0, 0); /* TODO: review. ngc and perm flags seems to conflict with each other ... the diff is that ngc is malloc() and perm is allocated in the perm heap */
hdr->_flags = MOO_OBJ_MAKE_FLAGS(type, unit, extra, 0, moo->igniting, 0, 0, 0, 0, 0); /* TODO: review. ngc and perm flags seems to conflict with each other ... the diff is that ngc is malloc() and perm is allocated in the perm heap */
hdr->_size = len;
MOO_OBJ_SET_SIZE (hdr, len);
MOO_OBJ_SET_CLASS (hdr, moo->_nil);
@ -388,8 +388,9 @@ moo_oop_t moo_instantiatewithtrailer (moo_t* moo, moo_oop_class_t _class, moo_oo
MOO_OBJ_SET_CLASS (oop, _class);
spec = MOO_OOP_TO_SMOOI(_class->spec);
if (MOO_CLASS_SPEC_IS_IMMUTABLE(spec)) MOO_OBJ_SET_FLAGS_RDONLY (oop, 1);
/* the object with a trailer is always uncopyable */
/*if (MOO_CLASS_SPEC_IS_UNCOPYABLE(spec)) */MOO_OBJ_SET_FLAGS_UNCOPYABLE (oop, 1);
/* the object with trailer is to to uncopyable in moo_allocoopobjwithtrailer() so no need to check/set it again here
if (MOO_CLASS_SPEC_IS_UNCOPYABLE(spec)) MOO_OBJ_SET_FLAGS_UNCOPYABLE (oop, 1);
*/
}
moo_popvolats (moo, tmp_count);