lua/doxygen/lfunc_8h_source.html

/*

** $Id: lfunc.h $

** Auxiliary functions to manipulate prototypes and closures

** See Copyright Notice in lua.h

*/


#ifndef lfunc_h

#define lfunc_h


#include "lobject.h"


#define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \

                         cast_int(sizeof(TValue)) * (n))


#define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \

                         cast_int(sizeof(TValue *)) * (n))


/* test whether thread is in 'twups' list */

#define isintwups(L)    (L->twups != L)


/*

** maximum number of upvalues in a closure (both C and Lua). (Value

** must fit in a VM register.)

*/

#define MAXUPVAL    255


#define upisopen(up)    ((up)->v != &(up)->u.value)


#define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v))


/*

** maximum number of misses before giving up the cache of closures

** in prototypes

*/

#define MAXMISS     10


/*

** Special "status" for 'luaF_close'

*/


/* close upvalues without running their closing methods */

#define NOCLOSINGMETH   (-1)


/* close upvalues running all closing methods in protected mode */

#define CLOSEPROTECT    (-2)


LUAI_FUNC Proto *luaF_newproto (lua_State *L);

LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals);

LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals);

LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);

LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);

LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);

LUAI_FUNC int luaF_close (lua_State *L, StkId level, int status);

LUAI_FUNC void luaF_unlinkupval (UpVal *uv);

LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);

LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,

                                         int pc);


#endif