lua/lfunc.h at master · lua/lua

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	/*
	** $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 to close upvalues preserving the top of the stack */
	#define CLOSEKTOP (-1)


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