mirror of https://github.com/lua/lua.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.6 KiB
74 lines
2.6 KiB
/*
|
|
** $Id: ldo.h,v 2.43 2018/02/17 19:29:29 roberto Exp roberto $
|
|
** 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 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
|
|
|
|
|