1 /* $NetBSD: lfunc.h,v 1.3 2015/10/08 13:21:00 mbalmer Exp $ */ 2 3 /* 4 ** Id: lfunc.h,v 2.15 2015/01/13 15:49:11 roberto Exp 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, sizeof(CClosure)) + \ 17 cast(int, sizeof(TValue)*((n)-1))) 18 19 #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \ 20 cast(int, sizeof(TValue *)*((n)-1))) 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 /* 35 ** Upvalues for Lua closures 36 */ 37 struct UpVal { 38 TValue *v; /* points to stack or to its own value */ 39 lu_mem refcount; /* reference counter */ 40 union { 41 struct { /* (when open) */ 42 UpVal *next; /* linked list */ 43 int touched; /* mark to avoid cycles with dead threads */ 44 } open; 45 TValue value; /* the value (when closed) */ 46 } u; 47 }; 48 49 #define upisopen(up) ((up)->v != &(up)->u.value) 50 51 52 LUAI_FUNC Proto *luaF_newproto (lua_State *L); 53 LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems); 54 LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems); 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_close (lua_State *L, StkId level); 58 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 59 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 60 int pc); 61 62 63 #endif 64