pike.git/ src/ svalue.h

2013-06-12

2013-06-12 18:29:23 by Henrik Grubbström (Grubba) <grubba@grubba.org>

• 833cae715cbcbceca889d19bb7e7730eb91ca586 (47 lines) (+30/-17) ^{[ Show | Annotate ]}
  Branch: 7.9

Runtime: Renumbered PIKE_T_*. Breaks ppc32 and ppc64.

Renumber the low PIKE_T_* values so that PIKE_T_INT becomes zero.

This has the feature that zeroed memory becomes filled with Pike
svalues containing integer zeroes (and not NULL pointer arrays).
This will let call_c_initializers() avoid traversing the entire
identifier table for the class.

Note: The serialized representation of types (__parse_pike_type())
is unchanged. As is the {out,in}put for {en,de}code_value().

Updates the code generators for ia32 and amd64.

Breaks the code generators for ppc32 and ppc64.

116:   */   #define INVALIDATE_SVAL(SVAL) SET_SVAL_TYPE(SVAL, 99) /* an invalid type */    - #define PIKE_T_ARRAY 0 - #define PIKE_T_MAPPING 1 - #define PIKE_T_MULTISET 2 - #define PIKE_T_OBJECT 3 - #define PIKE_T_FUNCTION 4 - #define PIKE_T_PROGRAM 5 - #define PIKE_T_STRING 6 - #define PIKE_T_TYPE 7 - #define PIKE_T_INT 8 - #define PIKE_T_FLOAT 9 + /* The native types. +  * +  * Note that PIKE_T_INT is zero so that cleared memory +  * is filled with zeroes. +  */ + #define PIKE_T_INT 0 + #define PIKE_T_FLOAT 1    -  + /* NB: The reference counted types all have bit 4 set. */ + #define PIKE_T_ARRAY 8 + #define PIKE_T_MAPPING 9 + #define PIKE_T_MULTISET 10 + #define PIKE_T_OBJECT 11 + #define PIKE_T_FUNCTION 12 + #define PIKE_T_PROGRAM 13 + #define PIKE_T_STRING 14 + #define PIKE_T_TYPE 15 +    /* The types above are valid types in svalues.    * The following are only used by the internal systems.    */    - #define PIKE_T_ZERO 14 /**< Can return 0, but nothing else */ + /* NB: 6 & 7 below are selected for easy backward compat with Pike 7.8. */ + #define PIKE_T_ZERO 6 /**< Can return 0, but nothing else */       - #define T_UNFINISHED 15 + #define T_UNFINISHED 7      #define T_VOID 16 /**< Can't return any value. Also used on stack to fill out the second    * svalue on an lvalue when it isn't used. */
200:   #define T_MULTISET_DATA 10003   #define T_STRUCT_CALLABLE 10004    + /* NOTE: The t* macros below currently use the old type encoding +  * to be compatible with __parse_pike_type() in older +  * versions of Pike. +  */   #define tArr(VAL) "\000" VAL   #define tArray tArr(tMix)   #define tMap(IND,VAL) "\001" IND VAL
325:   #define BIT_VOID (1 << T_VOID)      /** This is used in typechecking to signify that the rest of the -  * arguments has to be of this type. +  * arguments have to be of this type.    */   #define BIT_MANY (1 << T_MANY)   
338:      /* Max type which contains svalues */   #define MAX_COMPLEX PIKE_T_PROGRAM - /* Max type with ref count */ - #define MAX_REF_TYPE PIKE_T_TYPE + /* Min type with ref count */ + #define MIN_REF_TYPE PIKE_T_ARRAY   /* Max type handled by svalue primitives */ - #define MAX_TYPE PIKE_T_FLOAT + #define MAX_TYPE PIKE_T_TYPE    - #define REFCOUNTED_TYPE(T) ((T) <= MAX_REF_TYPE) + #define REFCOUNTED_TYPE(T) (((T) & ~(MIN_REF_TYPE - 1)) == MIN_REF_TYPE)      #define NUMBER_NUMBER 0   #define NUMBER_UNDEFINED 1