1 | /* |
2 | ** $Id: lfunc.h $ |
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(offsetof(CClosure, upvalue)) + \ |
15 | cast_int(sizeof(TValue)) * (n)) |
16 | |
17 | #define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \ |
18 | cast_int(sizeof(TValue *)) * (n)) |
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 | #define upisopen(up) ((up)->v != &(up)->u.value) |
33 | |
34 | |
35 | #define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v)) |
36 | |
37 | |
38 | /* |
39 | ** maximum number of misses before giving up the cache of closures |
40 | ** in prototypes |
41 | */ |
42 | #define MAXMISS 10 |
43 | |
44 | |
45 | /* |
46 | ** Special "status" for 'luaF_close' |
47 | */ |
48 | |
49 | /* close upvalues without running their closing methods */ |
50 | #define NOCLOSINGMETH (-1) |
51 | |
52 | /* close upvalues running all closing methods in protected mode */ |
53 | #define CLOSEPROTECT (-2) |
54 | |
55 | |
56 | LUAI_FUNC Proto *luaF_newproto (lua_State *L); |
57 | LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals); |
58 | LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals); |
59 | LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl); |
60 | LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); |
61 | LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level); |
62 | LUAI_FUNC int luaF_close (lua_State *L, StkId level, int status); |
63 | LUAI_FUNC void luaF_unlinkupval (UpVal *uv); |
64 | LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); |
65 | LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, |
66 | int pc); |
67 | |
68 | |
69 | #endif |
70 | |