mirror of
https://github.com/lua/lua
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82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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** $Id: lstate.h,v 1.6 1997/12/17 20:48:58 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 "lobject.h"
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#define MAX_C_BLOCKS 10
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#define GARBAGE_BLOCK 150
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typedef int StkId; /* index to stack elements */
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struct Stack {
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TObject *top;
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TObject *stack;
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TObject *last;
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};
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struct C_Lua_Stack {
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StkId base; /* when Lua calls C or C calls Lua, points to */
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/* the first slot after the last parameter. */
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StkId lua2C; /* points to first element of "array" lua2C */
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int num; /* size of "array" lua2C */
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};
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typedef struct {
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int size;
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int nuse; /* number of elements (including EMPTYs) */
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TaggedString **hash;
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} stringtable;
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struct ref {
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TObject o;
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enum {LOCK, HOLD, FREE, COLLECTED} status;
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};
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typedef struct LState {
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struct Stack stack; /* Lua stack */
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struct C_Lua_Stack Cstack; /* C2lua struct */
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void *errorJmp; /* current error recover point */
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TObject errorim; /* error tag method */
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GCnode rootproto; /* list of all prototypes */
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GCnode rootcl; /* list of all closures */
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GCnode roottable; /* list of all tables */
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GCnode rootglobal; /* list of strings with global values */
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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 IMtable_size; /* size of IMtable */
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int last_tag; /* last used tag in IMtable */
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struct FuncState *mainState, *currState; /* point to local structs in yacc */
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struct LexState *lexstate; /* point to local struct in yacc */
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struct ref *refArray; /* locked objects */
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int refSize; /* size of refArray */
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unsigned long GCthreshold;
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unsigned long nblocks; /* number of 'blocks' currently allocated */
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char *Mbuffer; /* global buffer */
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char *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[MAX_C_BLOCKS];
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int numCblocks; /* number of nested Cblocks */
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} LState;
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extern LState *lua_state;
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#define L lua_state
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#endif
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