external/mit/lua/dist/src/ldo.h

   1 /*      $NetBSD: ldo.h,v 1.1.1.2 2012/03/15 00:08:09 alnsn Exp $        */
   2
   3 /*
   4 ** $Id: ldo.h,v 1.1.1.2 2012/03/15 00:08:09 alnsn Exp $
   5 ** Stack and Call structure of Lua
   6 ** See Copyright Notice in lua.h
   7 */
   8
   9 #ifndef ldo_h
  10 #define ldo_h
  11
  12
  13 #include "lobject.h"
  14 #include "lstate.h"
  15 #include "lzio.h"
  16
  17
  18 #define luaD_checkstack(L,n)    \
  19   if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \
  20     luaD_growstack(L, n); \
  21   else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1));
  22
  23
  24 #define incr_top(L) {luaD_checkstack(L,1); L->top++;}
  25
  26 #define savestack(L,p)          ((char *)(p) - (char *)L->stack)
  27 #define restorestack(L,n)       ((TValue *)((char *)L->stack + (n)))
  28
  29 #define saveci(L,p)             ((char *)(p) - (char *)L->base_ci)
  30 #define restoreci(L,n)          ((CallInfo *)((char *)L->base_ci + (n)))
  31
  32
  33 /* results from luaD_precall */
  34 #define PCRLUA          0       /* initiated a call to a Lua function */
  35 #define PCRC            1       /* did a call to a C function */
  36 #define PCRYIELD        2       /* C funtion yielded */
  37
  38
  39 /* type of protected functions, to be ran by `runprotected' */
  40 typedef void (*Pfunc) (lua_State *L, void *ud);
  41
  42 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name);
  43 LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line);
  44 LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
  45 LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
  46 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
  47                                         ptrdiff_t oldtop, ptrdiff_t ef);
  48 LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
  49 LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize);
  50 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
  51 LUAI_FUNC void luaD_growstack (lua_State *L, int n);
  52
  53 LUAI_FUNC void luaD_throw (lua_State *L, int errcode);
  54 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
  55
  56 LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
  57
  58 #endif
  59