mirror of
https://github.com/lua/lua
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90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
/*
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** $Id: lstate.h,v 1.29 2000/02/08 16:34:31 roberto Exp roberto $
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** Global State
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** See Copyright Notice in lua.h
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*/
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#ifndef lstate_h
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#define lstate_h
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#include <setjmp.h>
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#include "lobject.h"
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#include "lua.h"
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#include "luadebug.h"
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typedef TObject *StkId; /* index to stack elements */
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/*
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** `jmp_buf' may be an array, so it is better to make sure it has an
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** address (and not that it *is* an address...)
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*/
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struct lua_longjmp {
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jmp_buf b;
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};
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/*
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** stack layout for C point of view:
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** [lua2C, lua2C+num) - `array' lua2C
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** [lua2C+num, base) - space for extra lua_Objects (limbo)
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** [base, L->top) - `stack' C2Lua
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*/
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struct C_Lua_Stack {
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StkId base;
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StkId lua2C;
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int num;
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};
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typedef struct stringtable {
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int size;
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int nuse; /* number of elements (including EMPTYs) */
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TString **hash;
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} stringtable;
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struct lua_State {
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/* thread-specific state */
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StkId top; /* first free slot in the stack */
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StkId stack; /* stack base */
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StkId stack_last; /* last free slot in the stack */
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int stacksize;
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struct C_Lua_Stack Cstack; /* C2lua struct */
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struct lua_longjmp *errorJmp; /* current error recover point */
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char *Mbuffer; /* global buffer */
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int Mbuffbase; /* current first position of Mbuffer */
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int Mbuffsize; /* size of Mbuffer */
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int Mbuffnext; /* next position to fill in Mbuffer */
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struct C_Lua_Stack *Cblocks;
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int numCblocks; /* number of nested Cblocks */
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/* global state */
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Proto *rootproto; /* list of all prototypes */
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Closure *rootcl; /* list of all closures */
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Hash *roottable; /* list of all tables */
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GlobalVar *rootglobal; /* list of global variables */
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stringtable *string_root; /* array of hash tables for strings and udata */
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struct IM *IMtable; /* table for tag methods */
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int last_tag; /* last used tag in IMtable */
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struct Ref *refArray; /* locked objects */
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int refSize; /* size of refArray */
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int refFree; /* list of free positions in refArray */
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unsigned long GCthreshold;
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unsigned long nblocks; /* number of `blocks' currently allocated */
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int debug;
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lua_Dbghook callhook;
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lua_Dbghook linehook;
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int allowhooks;
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};
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#endif
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