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1 /*
2 ** $Id: ldo.h,v 2.20.1.1 2013/04/12 18:48:47 roberto Exp $
3 ** Stack and Call structure of Lua
4 ** See Copyright Notice in lua.h
5 */
6 
7 #ifndef ldo_h
8 #define ldo_h
9 
10 
11 #include "lobject.h"
12 #include "lstate.h"
13 #include "lzio.h"
14 
15 
16 #define luaD_checkstack(L,n)	if (L->stack_last - L->top <= (n)) \
17 				    luaD_growstack(L, n); else condmovestack(L);
18 
19 
20 #define incr_top(L) {L->top++; luaD_checkstack(L,0);}
21 
22 #define savestack(L,p)		((char *)(p) - (char *)L->stack)
23 #define restorestack(L,n)	((TValue *)((char *)L->stack + (n)))
24 
25 
26 /* type of protected functions, to be ran by `runprotected' */
27 typedef void (*Pfunc) (lua_State *L, void *ud);
28 
29 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
30                                                   const char *mode);
31 LUAI_FUNC void luaD_hook (lua_State *L, int event, int line);
32 LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
33 LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults,
34                                         int allowyield);
35 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
36                                         ptrdiff_t oldtop, ptrdiff_t ef);
37 LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
38 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
39 LUAI_FUNC void luaD_growstack (lua_State *L, int n);
40 LUAI_FUNC void luaD_shrinkstack (lua_State *L);
41 
42 LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
43 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
44 
45 #endif
46 
47