mirror of https://github.com/lua/lua
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
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** $Id: lstate.h,v 1.57 2001/06/06 18:00:19 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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#include "lua.h"
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#include "luadebug.h"
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/*
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** macros for thread syncronization inside Lua core machine:
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** all accesses to the global state and to global objects are syncronized.
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** Because threads can read the stack of other threads
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** (when running garbage collection),
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** a thread must also syncronize any write-access to its own stack.
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** Unsyncronized accesses are allowed only when reading its own stack,
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** or when reading immutable fields from global objects
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** (such as string values and udata values).
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*/
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#ifndef lua_lock
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#define lua_lock(L) ((void) 0)
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#endif
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#ifndef lua_unlock
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#define lua_unlock(L) ((void) 0)
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#endif
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/*
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** macro to allow the inclusion of user information in Lua state
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*/
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#ifndef LUA_USERSTATE
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#define LUA_USERSTATE
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#endif
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struct lua_longjmp; /* defined in ldo.c */
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struct TM; /* defined in ltm.h */
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typedef struct stringtable {
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int size;
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ls_nstr nuse; /* number of elements */
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TString **hash;
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} stringtable;
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/*
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** `global state', shared by all threads of this state
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*/
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typedef struct global_State {
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void *Mbuffer; /* global buffer */
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size_t Mbuffsize; /* size of Mbuffer */
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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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Udata *rootudata; /* list of all userdata */
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stringtable strt; /* hash table for strings */
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Hash *type2tag; /* hash table from type names to tags */
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Hash *registry; /* (strong) registry table */
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Hash *weakregistry; /* weakregistry table */
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struct TM *TMtable; /* table for tag methods */
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int sizeTM; /* size of TMtable */
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int ntag; /* number of tags in TMtable */
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lu_mem GCthreshold;
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lu_mem nblocks; /* number of `bytes' currently allocated */
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} global_State;
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/*
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** `per thread' state
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*/
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struct lua_State {
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LUA_USERSTATE
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StkId top; /* first free slot in the stack */
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CallInfo *ci; /* call info for current function */
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StkId stack_last; /* last free slot in the stack */
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Hash *gt; /* table for globals */
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global_State *G;
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StkId stack; /* stack base */
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int stacksize;
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lua_Hook callhook;
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lua_Hook linehook;
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int allowhooks;
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struct lua_longjmp *errorJmp; /* current error recover point */
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lua_State *next; /* circular double linked list of states */
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lua_State *previous;
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CallInfo basefunc;
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};
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#define G(L) (L->G)
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#endif
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