1 /* 2 ** $Id: lfunc.h $ 3 ** Auxiliary functions to manipulate prototypes and closures 4 ** See Copyright Notice in lua.h 5 */ 6 7 #ifndef lfunc_h 8 #define lfunc_h 9 10 11 #include "lobject.h" 12 13 14 #define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \ 15 cast_int(sizeof(TValue)) * (n)) 16 17 #define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \ 18 cast_int(sizeof(TValue *)) * (n)) 19 20 21 /* test whether thread is in 'twups' list */ 22 #define isintwups(L) (L->twups != L) 23 24 25 /* 26 ** maximum number of upvalues in a closure (both C and Lua). (Value 27 ** must fit in a VM register.) 28 */ 29 #define MAXUPVAL 255 30 31 32 #define upisopen(up) ((up)->v.p != &(up)->u.value) 33 34 35 #define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v.p)) 36 37 38 /* 39 ** maximum number of misses before giving up the cache of closures 40 ** in prototypes 41 */ 42 #define MAXMISS 10 43 44 45 46 /* special status to close upvalues preserving the top of the stack */ 47 #define CLOSEKTOP (-1) 48 49 50 LUAI_FUNC Proto *luaF_newproto (lua_State *L); 51 LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); 52 LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); 53 LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); 54 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); 55 LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); 56 LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level); 57 LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy); 58 LUAI_FUNC void luaF_unlinkupval (UpVal *uv); 59 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 60 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 61 int pc); 62 63 64 #endif 65