| commit | author | age | ||
| 6e1425 | 1 | /* |
| H | 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) ((char *)(p) - (char *)L->stack) | |
| 25 | #define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) | |
| 26 | ||
| 27 | #define saveci(L,p) ((char *)(p) - (char *)L->base_ci) | |
| 28 | #define restoreci(L,n) ((CallInfo *)((char *)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 | ||
