1 /* 2 ** $Id: ldo.h,v 2.29.1.1 2017/04/19 17:20:42 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 /* 17 ** Macro to check stack size and grow stack if needed. Parameters 18 ** 'pre'/'pos' allow the macro to preserve a pointer into the 19 ** stack across reallocations, doing the work only when needed. 20 ** 'condmovestack' is used in heavy tests to force a stack reallocation 21 ** at every check. 22 */ 23 #define luaD_checkstackaux(L,n,pre,pos) \ 24 if (L->stack_last - L->top <= (n)) \ 25 { pre; luaD_growstack(L, n); pos; } else { condmovestack(L,pre,pos); } 26 27 /* In general, 'pre'/'pos' are empty (nothing to save) */ 28 #define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0) 29 30 31 32 #define savestack(L,p) ((char *)(p) - (char *)L->stack) 33 #define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) 34 35 36 /* type of protected functions, to be ran by 'runprotected' */ 37 typedef void (*Pfunc) (lua_State *L, void *ud); 38 39 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name, 40 const char *mode); 41 LUAI_FUNC void luaD_hook (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 void luaD_callnoyield (lua_State *L, StkId func, int nResults); 45 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, 46 ptrdiff_t oldtop, ptrdiff_t ef); 47 LUAI_FUNC int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, 48 int nres); 49 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); 50 LUAI_FUNC void luaD_growstack (lua_State *L, int n); 51 LUAI_FUNC void luaD_shrinkstack (lua_State *L); 52 LUAI_FUNC void luaD_inctop (lua_State *L); 53 54 LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode); 55 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); 56 57 #endif 58 59