lua/ldo.h

   1 /*
   2 ** $Id: ldo.h,v 2.7.1.1 2007/12/27 13:02:25 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)    \
  17   if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \
  18     luaD_growstack(L, n); \
  19   else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1));
  20
  21
  22 #define incr_top(L) {luaD_checkstack(L,1); L->top++;}
  23
  24 #define savestack(L,p)          ((TValue *)(p) - (TValue *)L->stack)
  25 #define restorestack(L,n)       ((TValue *)((TValue *)L->stack + (n)))
  26
  27 #define saveci(L,p)             ((CallInfo *)(p) - (CallInfo *)L->base_ci)
  28 #define restoreci(L,n)          ((CallInfo *)((CallInfo *)L->base_ci + (n)))
  29
  30
  31 /* results from luaD_precall */
  32 #define PCRLUA          0       /* initiated a call to a Lua function */
  33 #define PCRC            1       /* did a call to a C function */
  34 #define PCRYIELD        2       /* C funtion yielded */
  35
  36
  37 /* type of protected functions, to be ran by `runprotected' */
  38 typedef void (*Pfunc) (lua_State *L, void *ud);
  39
  40 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name);
  41 LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line);
  42 LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
  43 LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
  44 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
  45                                         ptrdiff_t oldtop, ptrdiff_t ef);
  46 LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
  47 LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize);
  48 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
  49 LUAI_FUNC void luaD_growstack (lua_State *L, int n);
  50
  51 LUAI_FUNC void luaD_throw (lua_State *L, int errcode);
  52 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
  53
  54 LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
  55
  56 #endif
  57