1 /* $NetBSD: lfunc.h,v 1.11 2023/06/08 21:12:08 nikita Exp $ */ 2 3 /* 4 ** Id: lfunc.h 5 ** Auxiliary functions to manipulate prototypes and closures 6 ** See Copyright Notice in lua.h 7 */ 8 9 #ifndef lfunc_h 10 #define lfunc_h 11 12 13 #include "lobject.h" 14 15 16 #define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \ 17 cast_int(sizeof(TValue)) * (n)) 18 19 #define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \ 20 cast_int(sizeof(TValue *)) * (n)) 21 22 23 /* test whether thread is in 'twups' list */ 24 #define isintwups(L) (L->twups != L) 25 26 27 /* 28 ** maximum number of upvalues in a closure (both C and Lua). (Value 29 ** must fit in a VM register.) 30 */ 31 #define MAXUPVAL 255 32 33 34 #define upisopen(up) ((up)->v.p != &(up)->u.value) 35 36 37 #define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v.p)) 38 39 40 /* 41 ** maximum number of misses before giving up the cache of closures 42 ** in prototypes 43 */ 44 #define MAXMISS 10 45 46 47 48 /* special status to close upvalues preserving the top of the stack */ 49 #define CLOSEKTOP (-1) 50 51 52 LUAI_FUNC Proto *luaF_newproto (lua_State *L); 53 LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); 54 LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); 55 LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); 56 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); 57 LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); 58 LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level); 59 LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy); 60 LUAI_FUNC void luaF_unlinkupval (UpVal *uv); 61 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 62 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 63 int pc); 64 65 66 #endif 67