mirror of
https://github.com/lua/lua
synced 2024-11-22 21:01:26 +03:00
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
|
|
** $Id: lfunc.h,v 2.14 2014/06/19 18:27:20 roberto Exp roberto $
|
|
** 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, sizeof(CClosure)) + \
|
|
cast(int, sizeof(TValue)*((n)-1)))
|
|
|
|
#define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
|
|
cast(int, sizeof(TValue *)*((n)-1)))
|
|
|
|
|
|
/* 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
|
|
|
|
|
|
/*
|
|
** Upvalues for Lua closures
|
|
*/
|
|
struct UpVal {
|
|
TValue *v; /* points to stack or to its own value */
|
|
lu_mem refcount; /* reference counter */
|
|
union {
|
|
struct { /* (when open) */
|
|
UpVal *next; /* linked list */
|
|
int touched; /* mark to avoid cycles with dead threads */
|
|
} open;
|
|
TValue value; /* the value (when closed) */
|
|
} u;
|
|
};
|
|
|
|
#define upisopen(up) ((up)->v != &(up)->u.value)
|
|
|
|
|
|
LUAI_FUNC Proto *luaF_newproto (lua_State *L);
|
|
LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
|
|
LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
|
|
LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
|
|
LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
|
|
LUAI_FUNC void luaF_close (lua_State *L, StkId level);
|
|
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
|