1/* 2** $Id: lfunc.h,v 2.15.1.1 2017/04/19 17:39:34 roberto Exp $ 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, sizeof(CClosure)) + \ 15 cast(int, sizeof(TValue)*((n)-1))) 16 17#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \ 18 cast(int, sizeof(TValue *)*((n)-1))) 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/* 33** Upvalues for Lua closures 34*/ 35struct UpVal { 36 TValue *v; /* points to stack or to its own value */ 37 lu_mem refcount; /* reference counter */ 38 union { 39 struct { /* (when open) */ 40 UpVal *next; /* linked list */ 41 int touched; /* mark to avoid cycles with dead threads */ 42 } open; 43 TValue value; /* the value (when closed) */ 44 } u; 45}; 46 47#define upisopen(up) ((up)->v != &(up)->u.value) 48 49 50LUAI_FUNC Proto *luaF_newproto (lua_State *L); 51LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems); 52LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems); 53LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); 54LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); 55LUAI_FUNC void luaF_close (lua_State *L, StkId level); 56LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 57LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 58 int pc); 59 60 61#endif 62