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lfunc.h
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1 /*
2 ** $Id: lfunc.h,v 2.15.1.1 2017/04/19 17:39:34 roberto Exp $
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, sizeof(CClosure)) + \
15  cast(int, sizeof(TValue)*((n)-1)))
16 
17 #define sizeLclosure(n) (cast(int, sizeof(LClosure)) + \
18  cast(int, sizeof(TValue *)*((n)-1)))
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 /*
33 ** Upvalues for Lua closures
34 */
35 struct UpVal {
36  TValue *v; /* points to stack or to its own value */
37  lu_mem refcount; /* reference counter */
38  union {
39  struct { /* (when open) */
40  UpVal *next; /* linked list */
41  int touched; /* mark to avoid cycles with dead threads */
42  } open;
43  TValue value; /* the value (when closed) */
44  } u;
45 };
46 
47 #define upisopen(up) ((up)->v != &(up)->u.value)
48 
49 
57 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
58  int pc);
59 
60 
61 #endif
void luaF_freeproto(lua_State *L, Proto *f)
UpVal * luaF_findupval(lua_State *L, StkId level)
CClosure * luaF_newCclosure(lua_State *L, int nelems)
Proto * luaF_newproto(lua_State *L)
void luaF_initupvals(lua_State *L, LClosure *cl)
LClosure * luaF_newLclosure(lua_State *L, int nelems)
void luaF_close(lua_State *L, StkId level)
const char * luaF_getlocalname(const Proto *func, int local_number, int pc)
unsigned long lu_mem
Definition: llimits.h:29
#define LUAI_FUNC
Definition: luaconf.h:282
Definition: lobject.h:407
Definition: lfunc.h:35
int touched
Definition: lfunc.h:41
struct UpVal::@29::@30 open
union UpVal::@29 u
UpVal * next
Definition: lfunc.h:40
TValue value
Definition: lfunc.h:43
lu_mem refcount
Definition: lfunc.h:37
TValue * v
Definition: lfunc.h:36
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