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 50LUAI_FUNC Proto *luaF_newproto (lua_State *L); 51LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); 52LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); 53LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); 54LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); 55LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); 56LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level); 57LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy); 58LUAI_FUNC void luaF_unlinkupval (UpVal *uv); 59LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 60LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 61 int pc); 62 63 64#endif 65