1 /* $NetBSD: ldo.h,v 1.8 2017/04/26 13:17:33 mbalmer Exp $ */ 2 3 /* 4 ** Id: ldo.h,v 2.29 2015/12/21 13:02:14 roberto 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 /* 19 ** Macro to check stack size and grow stack if needed. Parameters 20 ** 'pre'/'pos' allow the macro to preserve a pointer into the 21 ** stack across reallocations, doing the work only when needed. 22 ** 'condmovestack' is used in heavy tests to force a stack reallocation 23 ** at every check. 24 */ 25 #define luaD_checkstackaux(L,n,pre,pos) \ 26 if (L->stack_last - L->top <= (n)) \ 27 { pre; luaD_growstack(L, n); pos; } else { condmovestack(L,pre,pos); } 28 29 /* In general, 'pre'/'pos' are empty (nothing to save) */ 30 #define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0) 31 32 33 34 #define savestack(L,p) ((char *)(p) - (char *)L->stack) 35 #define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) 36 37 38 /* type of protected functions, to be ran by 'runprotected' */ 39 typedef void (*Pfunc) (lua_State *L, void *ud); 40 41 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name, 42 const char *mode); 43 LUAI_FUNC void luaD_hook (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 void luaD_callnoyield (lua_State *L, StkId func, int nResults); 47 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, 48 ptrdiff_t oldtop, ptrdiff_t ef); 49 LUAI_FUNC int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, 50 int nres); 51 LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); 52 LUAI_FUNC void luaD_growstack (lua_State *L, int n); 53 LUAI_FUNC void luaD_shrinkstack (lua_State *L); 54 LUAI_FUNC void luaD_inctop (lua_State *L); 55 56 LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode); 57 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); 58 59 #endif 60 61