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 52LUAI_FUNC Proto *luaF_newproto (lua_State *L); 53LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); 54LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); 55LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); 56LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); 57LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); 58LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level); 59LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy); 60LUAI_FUNC void luaF_unlinkupval (UpVal *uv); 61LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); 62LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, 63 int pc); 64 65 66#endif 67