| /* |
| ** $Id: ldo.h $ |
| ** Stack and Call structure of Lua |
| ** See Copyright Notice in lua.h |
| */ |
| |
| #ifndef ldo_h |
| #define ldo_h |
| |
| |
| #include "lobject.h" |
| #include "lstate.h" |
| #include "lzio.h" |
| |
| |
| /* |
| ** Macro to check stack size and grow stack if needed. Parameters |
| ** 'pre'/'pos' allow the macro to preserve a pointer into the |
| ** stack across reallocations, doing the work only when needed. |
| ** 'condmovestack' is used in heavy tests to force a stack reallocation |
| ** at every check. |
| */ |
| #define luaD_checkstackaux(L,n,pre,pos) \ |
| if (L->stack_last - L->top <= (n)) \ |
| { pre; luaD_growstack(L, n, 1); pos; } \ |
| else { condmovestack(L,pre,pos); } |
| |
| /* In general, 'pre'/'pos' are empty (nothing to save) */ |
| #define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0) |
| |
| |
| |
| #define savestack(L,p) ((char *)(p) - (char *)L->stack) |
| #define restorestack(L,n) ((StkId)((char *)L->stack + (n))) |
| |
| |
| /* macro to check stack size, preserving 'p' */ |
| #define checkstackp(L,n,p) \ |
| luaD_checkstackaux(L, n, \ |
| ptrdiff_t t__ = savestack(L, p); /* save 'p' */ \ |
| luaC_checkGC(L), /* stack grow uses memory */ \ |
| p = restorestack(L, t__)) /* 'pos' part: restore 'p' */ |
| |
| |
| /* macro to check stack size and GC */ |
| #define checkstackGC(L,fsize) \ |
| luaD_checkstackaux(L, (fsize), (void)0, luaC_checkGC(L)) |
| |
| |
| /* type of protected functions, to be ran by 'runprotected' */ |
| typedef void (*Pfunc) (lua_State *L, void *ud); |
| |
| LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop); |
| LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name, |
| const char *mode); |
| LUAI_FUNC void luaD_hook (lua_State *L, int event, int line, |
| int fTransfer, int nTransfer); |
| LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci); |
| LUAI_FUNC void luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, int n); |
| LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); |
| LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults); |
| LUAI_FUNC void luaD_tryfuncTM (lua_State *L, StkId func); |
| LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, |
| ptrdiff_t oldtop, ptrdiff_t ef); |
| LUAI_FUNC void luaD_poscall (lua_State *L, CallInfo *ci, int nres); |
| LUAI_FUNC int luaD_reallocstack (lua_State *L, int newsize, int raiseerror); |
| LUAI_FUNC int luaD_growstack (lua_State *L, int n, int raiseerror); |
| LUAI_FUNC void luaD_shrinkstack (lua_State *L); |
| LUAI_FUNC void luaD_inctop (lua_State *L); |
| |
| LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode); |
| LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); |
| |
| #endif |
| |